java -Xmx8000000000 -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 csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:34:23,157 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:34:23,159 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:34:23,177 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:34:23,177 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:34:23,178 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:34:23,179 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:34:23,181 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:34:23,183 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:34:23,184 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:34:23,185 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:34:23,185 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:34:23,186 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:34:23,187 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:34:23,188 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:34:23,189 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:34:23,189 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:34:23,191 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:34:23,193 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:34:23,195 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:34:23,196 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:34:23,197 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:34:23,199 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 23:34:23,208 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:34:23,223 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:34:23,224 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:34:23,225 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:34:23,225 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:34:23,226 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:34:23,226 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:34:23,226 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:34:23,227 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:34:23,227 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:34:23,228 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:34:23,229 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:34:23,229 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:34:23,229 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:34:23,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:34:23,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:34:23,231 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:34:23,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:34:23,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:34:23,231 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:34:23,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:34:23,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:34:23,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:34:23,232 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:34:23,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:34:23,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:34:23,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:34:23,306 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:34:23,306 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:34:23,307 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-07-23 23:34:23,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935518404/a87ddd40dbb243bf81c79755efe1f8d1/FLAGbf06c11d5 [2018-07-23 23:34:23,777 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:34:23,778 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-07-23 23:34:23,784 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935518404/a87ddd40dbb243bf81c79755efe1f8d1/FLAGbf06c11d5 [2018-07-23 23:34:23,798 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935518404/a87ddd40dbb243bf81c79755efe1f8d1 [2018-07-23 23:34:23,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:34:23,811 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:34:23,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:34:23,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:34:23,819 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:34:23,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:34:23" (1/1) ... [2018-07-23 23:34:23,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50a528a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:23, skipping insertion in model container [2018-07-23 23:34:23,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:34:23" (1/1) ... [2018-07-23 23:34:23,978 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:34:24,027 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:34:24,043 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:34:24,053 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:34:24,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24 WrapperNode [2018-07-23 23:34:24,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:34:24,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:34:24,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:34:24,069 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:34:24,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:34:24,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:34:24,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:34:24,107 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:34:24,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... [2018-07-23 23:34:24,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:34:24,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:34:24,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:34:24,131 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:34:24,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:34:24,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:34:24,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:34:24,477 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:34:24,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:34:24 BoogieIcfgContainer [2018-07-23 23:34:24,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:34:24,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:34:24,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:34:24,482 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:34:24,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:34:23" (1/3) ... [2018-07-23 23:34:24,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4674a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:34:24, skipping insertion in model container [2018-07-23 23:34:24,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:24" (2/3) ... [2018-07-23 23:34:24,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4674a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:34:24, skipping insertion in model container [2018-07-23 23:34:24,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:34:24" (3/3) ... [2018-07-23 23:34:24,486 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call4_true-termination.i [2018-07-23 23:34:24,506 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:34:24,518 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:34:24,562 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:34:24,563 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:34:24,563 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:34:24,563 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:34:24,563 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:34:24,563 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:34:24,564 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:34:24,564 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:34:24,564 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:34:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-07-23 23:34:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 23:34:24,582 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:24,582 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:24,583 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 413615625, now seen corresponding path program 1 times [2018-07-23 23:34:24,589 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:24,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:24,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:24,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:24,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:24,693 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:34:24,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:34:24,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:34:24,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:34:24,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:34:24,711 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2018-07-23 23:34:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:24,726 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-07-23 23:34:24,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:34:24,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-07-23 23:34:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:24,737 INFO L225 Difference]: With dead ends: 29 [2018-07-23 23:34:24,737 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 23:34:24,741 INFO L573 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 [2018-07-23 23:34:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 23:34:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 23:34:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 23:34:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-07-23 23:34:24,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-07-23 23:34:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:24,777 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-07-23 23:34:24,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:34:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-07-23 23:34:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 23:34:24,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:24,778 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:24,778 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 654469332, now seen corresponding path program 1 times [2018-07-23 23:34:24,778 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:24,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:24,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:24,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:24,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:24,809 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:34:24,810 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:34:24,811 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:34:24,811 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:34:24,812 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:34:24,812 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-07-23 23:34:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:25,002 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-07-23 23:34:25,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:34:25,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-07-23 23:34:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:25,004 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:34:25,004 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 23:34:25,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:34:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 23:34:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2018-07-23 23:34:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 23:34:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-07-23 23:34:25,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-07-23 23:34:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:25,009 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-07-23 23:34:25,009 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:34:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-07-23 23:34:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 23:34:25,010 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:25,010 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:25,011 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -556557226, now seen corresponding path program 1 times [2018-07-23 23:34:25,011 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:25,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:25,085 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:25,085 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:25,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:25,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:25,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:25,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-23 23:34:25,163 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:34:25,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:34:25,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:34:25,163 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2018-07-23 23:34:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:25,303 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-07-23 23:34:25,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:34:25,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-07-23 23:34:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:25,305 INFO L225 Difference]: With dead ends: 41 [2018-07-23 23:34:25,305 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 23:34:25,306 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:34:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 23:34:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-07-23 23:34:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 23:34:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-07-23 23:34:25,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-07-23 23:34:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:25,310 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-07-23 23:34:25,311 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:34:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-07-23 23:34:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:34:25,311 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:25,312 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:25,312 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -523460204, now seen corresponding path program 2 times [2018-07-23 23:34:25,313 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:25,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:34:25,377 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:34:25,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-23 23:34:25,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:34:25,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:34:25,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:34:25,379 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-07-23 23:34:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:25,644 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-07-23 23:34:25,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:34:25,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-07-23 23:34:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:25,646 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:34:25,646 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 23:34:25,649 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:34:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 23:34:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-23 23:34:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:34:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-07-23 23:34:25,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-07-23 23:34:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:25,653 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-07-23 23:34:25,653 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:34:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-07-23 23:34:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:34:25,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:25,656 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:25,656 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2024446829, now seen corresponding path program 1 times [2018-07-23 23:34:25,657 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:25,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:25,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:25,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:34:25,755 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:25,756 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-23 23:34:25,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:25,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:34:25,833 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:25,833 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-23 23:34:25,834 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:34:25,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:34:25,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:34:25,835 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-07-23 23:34:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:25,923 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-07-23 23:34:25,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:34:25,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-07-23 23:34:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:25,925 INFO L225 Difference]: With dead ends: 49 [2018-07-23 23:34:25,925 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 23:34:25,925 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:34:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 23:34:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2018-07-23 23:34:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 23:34:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-07-23 23:34:25,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2018-07-23 23:34:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:25,933 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-07-23 23:34:25,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:34:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-07-23 23:34:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:34:25,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:25,937 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:25,937 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1183251631, now seen corresponding path program 2 times [2018-07-23 23:34:25,938 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:25,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:25,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:25,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:34:26,015 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:26,016 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:26,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:26,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:26,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:26,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:34:26,069 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:26,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-23 23:34:26,069 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:34:26,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:34:26,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:34:26,070 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2018-07-23 23:34:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:26,271 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-07-23 23:34:26,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:34:26,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-07-23 23:34:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:26,272 INFO L225 Difference]: With dead ends: 59 [2018-07-23 23:34:26,272 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 23:34:26,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:34:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 23:34:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2018-07-23 23:34:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 23:34:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-07-23 23:34:26,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2018-07-23 23:34:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:26,279 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-07-23 23:34:26,279 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:34:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-07-23 23:34:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 23:34:26,280 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:26,280 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:26,280 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2023687123, now seen corresponding path program 3 times [2018-07-23 23:34:26,281 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:26,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:26,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:34:26,381 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:26,381 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:26,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:26,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-23 23:34:26,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:26,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:34:26,463 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:26,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2018-07-23 23:34:26,464 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:34:26,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:34:26,465 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:34:26,465 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2018-07-23 23:34:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:26,953 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2018-07-23 23:34:26,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:34:26,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-07-23 23:34:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:26,954 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:34:26,954 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 23:34:26,956 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:34:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 23:34:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-07-23 23:34:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 23:34:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-07-23 23:34:26,961 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 25 [2018-07-23 23:34:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:26,962 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-07-23 23:34:26,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:34:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-07-23 23:34:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:34:26,963 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:26,963 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:26,964 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1783195601, now seen corresponding path program 4 times [2018-07-23 23:34:26,964 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:26,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:26,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:26,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:26,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:27,083 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:27,083 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:27,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:27,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:27,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:27,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:27,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:27,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-23 23:34:27,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:34:27,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:34:27,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:34:27,157 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 8 states. [2018-07-23 23:34:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:27,285 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-07-23 23:34:27,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:34:27,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-07-23 23:34:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:27,287 INFO L225 Difference]: With dead ends: 75 [2018-07-23 23:34:27,287 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 23:34:27,287 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:34:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 23:34:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2018-07-23 23:34:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:34:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-07-23 23:34:27,293 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2018-07-23 23:34:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:27,293 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-07-23 23:34:27,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:34:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-07-23 23:34:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 23:34:27,295 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:27,295 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:27,295 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1551174611, now seen corresponding path program 5 times [2018-07-23 23:34:27,296 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:27,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:27,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:27,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:27,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:27,675 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:27,676 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:27,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:27,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-23 23:34:27,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:27,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:27,762 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:27,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:34:27,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:34:27,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:34:27,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:34:27,763 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 9 states. [2018-07-23 23:34:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:27,938 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2018-07-23 23:34:27,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:34:27,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2018-07-23 23:34:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:27,939 INFO L225 Difference]: With dead ends: 85 [2018-07-23 23:34:27,939 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 23:34:27,940 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:34:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 23:34:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2018-07-23 23:34:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:34:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-07-23 23:34:27,946 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2018-07-23 23:34:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:27,947 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-07-23 23:34:27,947 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:34:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-07-23 23:34:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:34:27,948 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:27,949 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:27,949 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 16240785, now seen corresponding path program 6 times [2018-07-23 23:34:27,949 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:27,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:27,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:27,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:27,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:28,120 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:28,120 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:28,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:28,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-23 23:34:28,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:28,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:28,190 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:28,191 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-23 23:34:28,191 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:34:28,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:34:28,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:34:28,192 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2018-07-23 23:34:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:28,382 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-07-23 23:34:28,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:34:28,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-07-23 23:34:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:28,383 INFO L225 Difference]: With dead ends: 95 [2018-07-23 23:34:28,383 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 23:34:28,384 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:34:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 23:34:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2018-07-23 23:34:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 23:34:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-07-23 23:34:28,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2018-07-23 23:34:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:28,394 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-07-23 23:34:28,394 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:34:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-07-23 23:34:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 23:34:28,396 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:28,396 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:28,396 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1319430931, now seen corresponding path program 7 times [2018-07-23 23:34:28,397 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:28,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:28,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:28,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:28,644 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:28,644 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:28,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:28,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:28,711 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:28,711 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:34:28,712 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:34:28,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:34:28,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:34:28,713 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2018-07-23 23:34:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:28,847 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-07-23 23:34:28,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:34:28,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-07-23 23:34:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:28,848 INFO L225 Difference]: With dead ends: 105 [2018-07-23 23:34:28,848 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 23:34:28,849 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:34:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 23:34:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2018-07-23 23:34:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:34:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-07-23 23:34:28,855 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2018-07-23 23:34:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:28,855 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-07-23 23:34:28,855 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:34:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-07-23 23:34:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:34:28,856 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:28,857 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:28,857 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1847285423, now seen corresponding path program 8 times [2018-07-23 23:34:28,857 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:28,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:28,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:28,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:28,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:29,020 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:29,020 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:29,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:29,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:29,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:29,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:29,130 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:29,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-23 23:34:29,131 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:34:29,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:34:29,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:34:29,132 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2018-07-23 23:34:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:29,696 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-07-23 23:34:29,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:34:29,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-07-23 23:34:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:29,699 INFO L225 Difference]: With dead ends: 115 [2018-07-23 23:34:29,699 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 23:34:29,700 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:34:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 23:34:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2018-07-23 23:34:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:34:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-07-23 23:34:29,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2018-07-23 23:34:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:29,708 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-07-23 23:34:29,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:34:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-07-23 23:34:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:34:29,709 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:29,709 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:29,709 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1757436499, now seen corresponding path program 9 times [2018-07-23 23:34:29,710 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:29,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:29,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:29,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:29,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:34:29,918 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:29,918 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:29,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:29,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-23 23:34:29,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:29,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:34:30,021 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:30,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2018-07-23 23:34:30,022 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:34:30,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:34:30,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:34:30,023 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 14 states. [2018-07-23 23:34:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:30,255 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2018-07-23 23:34:30,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:34:30,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2018-07-23 23:34:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:30,257 INFO L225 Difference]: With dead ends: 113 [2018-07-23 23:34:30,257 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 23:34:30,259 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:34:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 23:34:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2018-07-23 23:34:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 23:34:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-07-23 23:34:30,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 55 [2018-07-23 23:34:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:30,265 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-07-23 23:34:30,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:34:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-07-23 23:34:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 23:34:30,267 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:30,267 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:30,267 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2145646671, now seen corresponding path program 10 times [2018-07-23 23:34:30,268 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:30,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:30,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:30,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:34:30,450 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:30,450 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:30,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:30,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:30,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:30,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:34:30,541 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:30,541 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-23 23:34:30,542 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:34:30,542 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:34:30,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:34:30,543 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 14 states. [2018-07-23 23:34:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:30,764 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-07-23 23:34:30,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:34:30,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-07-23 23:34:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:30,766 INFO L225 Difference]: With dead ends: 129 [2018-07-23 23:34:30,766 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 23:34:30,767 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:34:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 23:34:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2018-07-23 23:34:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:34:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-07-23 23:34:30,772 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2018-07-23 23:34:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:30,773 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-07-23 23:34:30,773 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:34:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-07-23 23:34:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 23:34:30,774 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:30,774 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:30,775 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1550495053, now seen corresponding path program 11 times [2018-07-23 23:34:30,775 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:30,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:30,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:34:31,027 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:31,027 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:31,038 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:31,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-23 23:34:31,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:31,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:34:31,174 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:31,174 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:34:31,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:34:31,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:34:31,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:34:31,176 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 15 states. [2018-07-23 23:34:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:31,387 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-07-23 23:34:31,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:34:31,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2018-07-23 23:34:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:31,389 INFO L225 Difference]: With dead ends: 139 [2018-07-23 23:34:31,389 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 23:34:31,390 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:34:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 23:34:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2018-07-23 23:34:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 23:34:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-07-23 23:34:31,396 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2018-07-23 23:34:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:31,396 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-07-23 23:34:31,396 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:34:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-07-23 23:34:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 23:34:31,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:31,398 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:31,398 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1013641103, now seen corresponding path program 12 times [2018-07-23 23:34:31,398 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:31,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:31,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:31,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:31,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:34:31,923 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:31,923 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:31,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:31,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-07-23 23:34:32,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:32,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:34:32,070 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:32,070 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-07-23 23:34:32,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:34:32,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:34:32,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:34:32,071 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 17 states. [2018-07-23 23:34:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:32,245 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2018-07-23 23:34:32,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:34:32,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2018-07-23 23:34:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:32,247 INFO L225 Difference]: With dead ends: 143 [2018-07-23 23:34:32,247 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 23:34:32,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:34:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 23:34:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2018-07-23 23:34:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 23:34:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-07-23 23:34:32,253 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 82 [2018-07-23 23:34:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:32,254 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-07-23 23:34:32,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:34:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-07-23 23:34:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 23:34:32,255 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:32,255 INFO L353 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:32,255 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash 570072948, now seen corresponding path program 13 times [2018-07-23 23:34:32,256 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:32,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:32,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:32,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:32,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:34:32,531 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:32,532 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:32,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:32,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:34:32,609 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:32,609 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:34:32,609 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:34:32,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:34:32,610 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:34:32,610 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 17 states. [2018-07-23 23:34:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:32,771 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-07-23 23:34:32,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:34:32,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2018-07-23 23:34:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:32,774 INFO L225 Difference]: With dead ends: 156 [2018-07-23 23:34:32,774 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 23:34:32,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:34:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 23:34:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2018-07-23 23:34:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:34:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-07-23 23:34:32,779 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2018-07-23 23:34:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:32,780 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-07-23 23:34:32,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:34:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-07-23 23:34:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 23:34:32,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:32,782 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:32,782 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1059843574, now seen corresponding path program 14 times [2018-07-23 23:34:32,782 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:32,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:32,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:32,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:32,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:34:33,781 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:33,781 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:33,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:33,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:33,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:33,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:34:33,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:33,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-23 23:34:33,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:34:33,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:34:33,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:34:33,899 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 18 states. [2018-07-23 23:34:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:34,143 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2018-07-23 23:34:34,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:34:34,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2018-07-23 23:34:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:34,145 INFO L225 Difference]: With dead ends: 166 [2018-07-23 23:34:34,145 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 23:34:34,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:34:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 23:34:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2018-07-23 23:34:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 23:34:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-07-23 23:34:34,150 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2018-07-23 23:34:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:34,151 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-07-23 23:34:34,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:34:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-07-23 23:34:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 23:34:34,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:34,152 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:34,152 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:34,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1812658228, now seen corresponding path program 15 times [2018-07-23 23:34:34,153 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:34,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:34,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:34,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:34,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:34:34,411 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:34,411 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:34,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:34,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-07-23 23:34:34,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:34,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-07-23 23:34:34,631 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:34,631 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-07-23 23:34:34,631 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:34:34,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:34:34,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:34:34,632 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 20 states. [2018-07-23 23:34:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:35,007 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2018-07-23 23:34:35,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:34:35,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2018-07-23 23:34:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:35,009 INFO L225 Difference]: With dead ends: 170 [2018-07-23 23:34:35,009 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 23:34:35,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:34:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 23:34:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2018-07-23 23:34:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 23:34:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-07-23 23:34:35,013 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 100 [2018-07-23 23:34:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:35,013 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-07-23 23:34:35,013 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:34:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-07-23 23:34:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 23:34:35,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:35,014 INFO L353 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:35,015 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1677348753, now seen corresponding path program 16 times [2018-07-23 23:34:35,015 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:35,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:35,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:35,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:35,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:35,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:35,961 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:35,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:36,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:36,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:36,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:36,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:36,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-23 23:34:36,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:34:36,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:34:36,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:34:36,054 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 20 states. [2018-07-23 23:34:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:36,230 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2018-07-23 23:34:36,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:34:36,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2018-07-23 23:34:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:36,232 INFO L225 Difference]: With dead ends: 183 [2018-07-23 23:34:36,232 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 23:34:36,233 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:34:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 23:34:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2018-07-23 23:34:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:34:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-07-23 23:34:36,237 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2018-07-23 23:34:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:36,237 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-07-23 23:34:36,238 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:34:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-07-23 23:34:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 23:34:36,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:36,239 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:36,239 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1362739603, now seen corresponding path program 17 times [2018-07-23 23:34:36,239 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:36,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:36,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:36,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:36,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:36,559 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:36,559 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:36,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:36,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-23 23:34:36,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:36,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:36,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:36,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:34:36,696 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:34:36,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:34:36,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:34:36,697 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 21 states. [2018-07-23 23:34:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:36,849 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2018-07-23 23:34:36,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:34:36,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 115 [2018-07-23 23:34:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:36,851 INFO L225 Difference]: With dead ends: 193 [2018-07-23 23:34:36,851 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 23:34:36,852 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:34:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 23:34:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2018-07-23 23:34:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 23:34:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-07-23 23:34:36,856 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 115 [2018-07-23 23:34:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:36,856 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-07-23 23:34:36,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:34:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-07-23 23:34:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 23:34:36,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:36,857 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:36,857 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 460191825, now seen corresponding path program 18 times [2018-07-23 23:34:36,858 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:36,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:36,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:36,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:37,137 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:37,137 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:37,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:37,277 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-07-23 23:34:37,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:37,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:37,332 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:37,332 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-23 23:34:37,332 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:34:37,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:34:37,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:34:37,333 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 22 states. [2018-07-23 23:34:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:37,525 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2018-07-23 23:34:37,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:34:37,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2018-07-23 23:34:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:37,529 INFO L225 Difference]: With dead ends: 203 [2018-07-23 23:34:37,529 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 23:34:37,530 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:34:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 23:34:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2018-07-23 23:34:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 23:34:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-07-23 23:34:37,534 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2018-07-23 23:34:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:37,535 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-07-23 23:34:37,535 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:34:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-07-23 23:34:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 23:34:37,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:37,536 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:37,536 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash -845389613, now seen corresponding path program 19 times [2018-07-23 23:34:37,537 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:37,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:37,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:37,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:37,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:37,947 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:37,947 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:37,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:37,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:38,038 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:38,038 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:34:38,038 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:34:38,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:34:38,039 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:34:38,039 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 23 states. [2018-07-23 23:34:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:38,260 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2018-07-23 23:34:38,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:34:38,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-07-23 23:34:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:38,262 INFO L225 Difference]: With dead ends: 213 [2018-07-23 23:34:38,262 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 23:34:38,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:34:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 23:34:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2018-07-23 23:34:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:34:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-07-23 23:34:38,267 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2018-07-23 23:34:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:38,267 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-07-23 23:34:38,268 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:34:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-07-23 23:34:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 23:34:38,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:38,268 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:38,269 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -198176495, now seen corresponding path program 20 times [2018-07-23 23:34:38,269 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:38,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:38,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:38,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:38,641 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:38,642 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:38,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:38,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:38,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:38,726 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:38,726 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-23 23:34:38,726 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:34:38,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:34:38,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:34:38,727 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 24 states. [2018-07-23 23:34:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:38,915 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-07-23 23:34:38,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:34:38,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2018-07-23 23:34:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:38,917 INFO L225 Difference]: With dead ends: 223 [2018-07-23 23:34:38,917 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 23:34:38,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:34:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 23:34:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 128. [2018-07-23 23:34:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 23:34:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-07-23 23:34:38,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2018-07-23 23:34:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:38,922 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-07-23 23:34:38,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:34:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-07-23 23:34:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 23:34:38,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:38,923 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:38,923 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 819630099, now seen corresponding path program 21 times [2018-07-23 23:34:38,923 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:38,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:38,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:38,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-23 23:34:39,242 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:39,242 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:39,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:39,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-07-23 23:34:39,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:39,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-07-23 23:34:39,469 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:39,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 26 [2018-07-23 23:34:39,470 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:34:39,470 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:34:39,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:34:39,470 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 26 states. [2018-07-23 23:34:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:39,813 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2018-07-23 23:34:39,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:34:39,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2018-07-23 23:34:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:39,815 INFO L225 Difference]: With dead ends: 221 [2018-07-23 23:34:39,815 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 23:34:39,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=636, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:34:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 23:34:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2018-07-23 23:34:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 23:34:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-07-23 23:34:39,820 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 127 [2018-07-23 23:34:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:39,820 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-07-23 23:34:39,820 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:34:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-07-23 23:34:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 23:34:39,821 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:39,821 INFO L353 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:39,821 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1054490481, now seen corresponding path program 22 times [2018-07-23 23:34:39,822 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:39,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:39,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:39,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:39,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:40,520 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:40,520 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:40,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:40,567 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:40,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:40,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:40,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:40,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-23 23:34:40,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:34:40,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:34:40,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:34:40,619 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 26 states. [2018-07-23 23:34:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:40,822 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2018-07-23 23:34:40,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:34:40,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 148 [2018-07-23 23:34:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:40,825 INFO L225 Difference]: With dead ends: 237 [2018-07-23 23:34:40,825 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 23:34:40,826 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:34:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 23:34:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2018-07-23 23:34:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 23:34:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2018-07-23 23:34:40,830 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2018-07-23 23:34:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:40,830 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2018-07-23 23:34:40,830 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:34:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2018-07-23 23:34:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 23:34:40,831 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:40,831 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:40,832 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1676126093, now seen corresponding path program 23 times [2018-07-23 23:34:40,832 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:40,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:40,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:40,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:40,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:41,167 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:41,167 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:41,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:41,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-07-23 23:34:41,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:41,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:41,348 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:41,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:34:41,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:34:41,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:34:41,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:34:41,349 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 27 states. [2018-07-23 23:34:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:42,316 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-07-23 23:34:42,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:34:42,317 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 151 [2018-07-23 23:34:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:42,318 INFO L225 Difference]: With dead ends: 247 [2018-07-23 23:34:42,318 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 23:34:42,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:34:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 23:34:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2018-07-23 23:34:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 23:34:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-07-23 23:34:42,323 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 151 [2018-07-23 23:34:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:42,323 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-07-23 23:34:42,323 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:34:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-07-23 23:34:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 23:34:42,324 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:42,324 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:42,324 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1501071409, now seen corresponding path program 24 times [2018-07-23 23:34:42,325 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:42,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:42,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:42,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:42,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:43,494 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:43,494 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:43,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:43,670 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-07-23 23:34:43,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:43,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:43,726 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:43,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-07-23 23:34:43,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:34:43,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:34:43,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:34:43,728 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 28 states. [2018-07-23 23:34:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:43,954 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-07-23 23:34:43,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:34:43,954 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2018-07-23 23:34:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:43,955 INFO L225 Difference]: With dead ends: 257 [2018-07-23 23:34:43,956 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 23:34:43,957 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:34:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 23:34:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2018-07-23 23:34:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 23:34:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-07-23 23:34:43,961 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2018-07-23 23:34:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:43,961 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-07-23 23:34:43,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:34:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-07-23 23:34:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 23:34:43,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:43,962 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:43,962 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash 902584243, now seen corresponding path program 25 times [2018-07-23 23:34:43,963 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:43,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:43,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:43,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:43,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:44,394 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:44,394 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:44,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:44,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:44,491 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:44,491 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:34:44,491 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:34:44,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:34:44,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:34:44,492 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 29 states. [2018-07-23 23:34:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:44,738 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2018-07-23 23:34:44,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:34:44,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-07-23 23:34:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:44,740 INFO L225 Difference]: With dead ends: 267 [2018-07-23 23:34:44,741 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 23:34:44,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:34:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 23:34:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 161. [2018-07-23 23:34:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 23:34:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-07-23 23:34:44,746 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2018-07-23 23:34:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:44,747 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-07-23 23:34:44,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:34:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-07-23 23:34:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 23:34:44,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:44,748 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:44,748 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash -219332367, now seen corresponding path program 26 times [2018-07-23 23:34:44,748 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:44,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:44,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:44,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:44,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:45,248 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:45,248 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:45,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:45,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:45,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:45,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:45,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:45,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-07-23 23:34:45,353 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:34:45,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:34:45,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:34:45,354 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 30 states. [2018-07-23 23:34:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:45,896 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2018-07-23 23:34:45,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:34:45,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 160 [2018-07-23 23:34:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:45,898 INFO L225 Difference]: With dead ends: 277 [2018-07-23 23:34:45,898 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 23:34:45,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:34:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 23:34:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 164. [2018-07-23 23:34:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 23:34:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2018-07-23 23:34:45,903 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2018-07-23 23:34:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:45,903 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2018-07-23 23:34:45,903 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:34:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2018-07-23 23:34:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 23:34:45,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:45,904 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:45,904 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash 198436595, now seen corresponding path program 27 times [2018-07-23 23:34:45,905 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:45,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:45,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:45,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:45,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-07-23 23:34:46,397 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:46,397 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:46,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:46,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-07-23 23:34:46,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:46,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-07-23 23:34:46,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:46,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 32 [2018-07-23 23:34:46,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:34:46,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:34:46,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:34:46,758 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 32 states. [2018-07-23 23:34:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:47,090 INFO L93 Difference]: Finished difference Result 275 states and 283 transitions. [2018-07-23 23:34:47,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 23:34:47,090 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 163 [2018-07-23 23:34:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:47,092 INFO L225 Difference]: With dead ends: 275 [2018-07-23 23:34:47,092 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 23:34:47,093 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=521, Invalid=885, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:34:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 23:34:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-07-23 23:34:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 23:34:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-07-23 23:34:47,098 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 163 [2018-07-23 23:34:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:47,098 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-07-23 23:34:47,098 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:34:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-07-23 23:34:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 23:34:47,099 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:47,099 INFO L353 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:47,099 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1607346351, now seen corresponding path program 28 times [2018-07-23 23:34:47,100 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:47,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:47,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:47,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:47,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:47,593 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:47,593 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:47,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:47,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:47,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:47,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:47,727 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:47,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-07-23 23:34:47,728 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:34:47,728 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:34:47,728 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:34:47,729 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 32 states. [2018-07-23 23:34:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:48,075 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-07-23 23:34:48,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:34:48,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 184 [2018-07-23 23:34:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:48,077 INFO L225 Difference]: With dead ends: 291 [2018-07-23 23:34:48,077 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 23:34:48,079 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:34:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 23:34:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2018-07-23 23:34:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 23:34:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2018-07-23 23:34:48,083 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2018-07-23 23:34:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:48,083 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2018-07-23 23:34:48,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:34:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2018-07-23 23:34:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 23:34:48,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:48,085 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:48,085 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1097275219, now seen corresponding path program 29 times [2018-07-23 23:34:48,085 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:48,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:48,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:48,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:48,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:49,144 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:49,144 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:49,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:49,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-07-23 23:34:49,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:49,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:49,424 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:49,424 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:34:49,424 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:34:49,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:34:49,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:34:49,425 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 33 states. [2018-07-23 23:34:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:49,680 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-07-23 23:34:49,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:34:49,681 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 187 [2018-07-23 23:34:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:49,682 INFO L225 Difference]: With dead ends: 301 [2018-07-23 23:34:49,683 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 23:34:49,684 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:34:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 23:34:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2018-07-23 23:34:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 23:34:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-07-23 23:34:49,687 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 187 [2018-07-23 23:34:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:49,687 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-07-23 23:34:49,687 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:34:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-07-23 23:34:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 23:34:49,688 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:49,688 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:49,688 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 891994129, now seen corresponding path program 30 times [2018-07-23 23:34:49,689 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:49,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:49,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:49,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:49,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:50,620 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:50,620 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:50,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:50,940 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-07-23 23:34:50,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:50,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:50,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:50,991 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-07-23 23:34:50,991 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:34:50,991 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:34:50,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:34:50,992 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 34 states. [2018-07-23 23:34:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:51,232 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-07-23 23:34:51,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:34:51,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 190 [2018-07-23 23:34:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:51,235 INFO L225 Difference]: With dead ends: 311 [2018-07-23 23:34:51,235 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 23:34:51,236 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:34:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 23:34:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2018-07-23 23:34:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 23:34:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2018-07-23 23:34:51,239 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 190 [2018-07-23 23:34:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:51,240 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2018-07-23 23:34:51,240 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:34:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2018-07-23 23:34:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 23:34:51,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:51,241 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:51,241 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1396471443, now seen corresponding path program 31 times [2018-07-23 23:34:51,242 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:51,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:51,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:51,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:52,302 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:52,302 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:52,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:52,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:52,418 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:52,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:34:52,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:34:52,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:34:52,419 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:34:52,420 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 35 states. [2018-07-23 23:34:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:52,699 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-07-23 23:34:52,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:34:52,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 193 [2018-07-23 23:34:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:52,700 INFO L225 Difference]: With dead ends: 321 [2018-07-23 23:34:52,700 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 23:34:52,701 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:34:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 23:34:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 197. [2018-07-23 23:34:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 23:34:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-07-23 23:34:52,704 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 193 [2018-07-23 23:34:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:52,705 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-07-23 23:34:52,705 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:34:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-07-23 23:34:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 23:34:52,706 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:52,706 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:52,706 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:52,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2105403183, now seen corresponding path program 32 times [2018-07-23 23:34:52,707 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:52,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:52,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:52,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:53,615 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:53,615 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:53,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:53,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:53,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:53,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:53,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:53,745 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-07-23 23:34:53,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:34:53,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:34:53,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:34:53,746 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 36 states. [2018-07-23 23:34:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:55,114 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-07-23 23:34:55,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:34:55,115 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 196 [2018-07-23 23:34:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:55,117 INFO L225 Difference]: With dead ends: 331 [2018-07-23 23:34:55,117 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 23:34:55,119 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:34:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 23:34:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2018-07-23 23:34:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 23:34:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2018-07-23 23:34:55,123 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2018-07-23 23:34:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:55,123 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2018-07-23 23:34:55,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:34:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2018-07-23 23:34:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 23:34:55,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:55,125 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:55,125 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1696766509, now seen corresponding path program 33 times [2018-07-23 23:34:55,125 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:55,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:55,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:55,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:55,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-07-23 23:34:56,915 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:56,915 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:56,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:57,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-07-23 23:34:57,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:57,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2018-07-23 23:34:57,660 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:57,660 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 38 [2018-07-23 23:34:57,661 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:34:57,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:34:57,661 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:34:57,661 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 38 states. [2018-07-23 23:34:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:58,082 INFO L93 Difference]: Finished difference Result 329 states and 337 transitions. [2018-07-23 23:34:58,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:34:58,082 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 199 [2018-07-23 23:34:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:58,084 INFO L225 Difference]: With dead ends: 329 [2018-07-23 23:34:58,084 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 23:34:58,085 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=722, Invalid=1170, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:34:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 23:34:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2018-07-23 23:34:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 23:34:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-07-23 23:34:58,089 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 199 [2018-07-23 23:34:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:58,090 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-07-23 23:34:58,090 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:34:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-07-23 23:34:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 23:34:58,091 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:58,091 INFO L353 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:58,092 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -571009231, now seen corresponding path program 34 times [2018-07-23 23:34:58,092 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:58,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:58,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-07-23 23:34:59,027 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:59,027 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:59,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:59,095 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:59,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:59,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-07-23 23:34:59,161 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:59,161 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-07-23 23:34:59,161 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:34:59,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:34:59,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:34:59,162 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 38 states. [2018-07-23 23:34:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:59,448 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2018-07-23 23:34:59,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:34:59,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 220 [2018-07-23 23:34:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:59,450 INFO L225 Difference]: With dead ends: 345 [2018-07-23 23:34:59,450 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 23:34:59,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:34:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 23:34:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2018-07-23 23:34:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 23:34:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2018-07-23 23:34:59,455 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 220 [2018-07-23 23:34:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:59,456 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2018-07-23 23:34:59,456 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:34:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2018-07-23 23:34:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 23:34:59,457 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:59,457 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:59,458 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -455344589, now seen corresponding path program 35 times [2018-07-23 23:34:59,458 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:59,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:59,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-07-23 23:35:00,123 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:00,124 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:00,131 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:35:00,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-07-23 23:35:00,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:00,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-07-23 23:35:00,579 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:00,579 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-07-23 23:35:00,580 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:35:00,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:35:00,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:35:00,581 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 39 states. [2018-07-23 23:35:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:02,882 INFO L93 Difference]: Finished difference Result 355 states and 357 transitions. [2018-07-23 23:35:02,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:35:02,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 223 [2018-07-23 23:35:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:02,884 INFO L225 Difference]: With dead ends: 355 [2018-07-23 23:35:02,884 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 23:35:02,885 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:35:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 23:35:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 227. [2018-07-23 23:35:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 23:35:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-07-23 23:35:02,888 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 223 [2018-07-23 23:35:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:02,889 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-07-23 23:35:02,889 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:35:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-07-23 23:35:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 23:35:02,890 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:02,890 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:02,890 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash 746233841, now seen corresponding path program 36 times [2018-07-23 23:35:02,890 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:02,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:02,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:02,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:02,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-07-23 23:35:04,054 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:04,054 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:04,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:35:04,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-07-23 23:35:04,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:04,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2018-07-23 23:35:05,207 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:05,207 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-07-23 23:35:05,208 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:35:05,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:35:05,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:35:05,209 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 41 states. [2018-07-23 23:35:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:06,045 INFO L93 Difference]: Finished difference Result 359 states and 364 transitions. [2018-07-23 23:35:06,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:35:06,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 226 [2018-07-23 23:35:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:06,047 INFO L225 Difference]: With dead ends: 359 [2018-07-23 23:35:06,048 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 23:35:06,048 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=800, Invalid=1092, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:35:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 23:35:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2018-07-23 23:35:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 23:35:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-07-23 23:35:06,052 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 226 [2018-07-23 23:35:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:06,052 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-07-23 23:35:06,052 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:35:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-07-23 23:35:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 23:35:06,053 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:06,053 INFO L353 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:06,054 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1913086964, now seen corresponding path program 37 times [2018-07-23 23:35:06,054 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:06,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:06,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:06,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2018-07-23 23:35:06,770 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:06,770 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:06,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:06,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2018-07-23 23:35:06,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:06,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-07-23 23:35:06,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:35:06,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:35:06,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:35:06,929 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 41 states. [2018-07-23 23:35:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:07,298 INFO L93 Difference]: Finished difference Result 372 states and 374 transitions. [2018-07-23 23:35:07,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:35:07,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 238 [2018-07-23 23:35:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:07,300 INFO L225 Difference]: With dead ends: 372 [2018-07-23 23:35:07,301 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 23:35:07,302 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:35:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 23:35:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 242. [2018-07-23 23:35:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 23:35:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2018-07-23 23:35:07,306 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 238 [2018-07-23 23:35:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:07,306 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2018-07-23 23:35:07,306 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:35:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2018-07-23 23:35:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 23:35:07,308 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:07,308 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:07,308 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1635077750, now seen corresponding path program 38 times [2018-07-23 23:35:07,308 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:07,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:07,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:07,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:07,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2018-07-23 23:35:08,404 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:08,404 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:08,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:35:08,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:35:08,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:08,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2018-07-23 23:35:08,567 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:08,567 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-07-23 23:35:08,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:35:08,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:35:08,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:35:08,569 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 42 states. [2018-07-23 23:35:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:09,119 INFO L93 Difference]: Finished difference Result 382 states and 384 transitions. [2018-07-23 23:35:09,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 23:35:09,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 241 [2018-07-23 23:35:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:09,121 INFO L225 Difference]: With dead ends: 382 [2018-07-23 23:35:09,121 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 23:35:09,123 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:35:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 23:35:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2018-07-23 23:35:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 23:35:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-07-23 23:35:09,127 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 241 [2018-07-23 23:35:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:09,127 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-07-23 23:35:09,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:35:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-07-23 23:35:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 23:35:09,128 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:09,128 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:09,129 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 159530164, now seen corresponding path program 39 times [2018-07-23 23:35:09,129 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:09,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:09,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:09,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:09,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4605 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2018-07-23 23:35:09,973 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:09,973 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:09,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:35:11,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-07-23 23:35:11,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:11,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4605 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-07-23 23:35:11,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:11,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-07-23 23:35:11,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:35:11,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:35:11,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:35:11,781 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 44 states. [2018-07-23 23:35:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:12,188 INFO L93 Difference]: Finished difference Result 386 states and 391 transitions. [2018-07-23 23:35:12,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 23:35:12,189 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 244 [2018-07-23 23:35:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:12,190 INFO L225 Difference]: With dead ends: 386 [2018-07-23 23:35:12,191 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 23:35:12,192 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=923, Invalid=1239, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:35:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 23:35:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2018-07-23 23:35:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 23:35:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-07-23 23:35:12,196 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 244 [2018-07-23 23:35:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:12,197 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-07-23 23:35:12,197 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:35:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-07-23 23:35:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 23:35:12,198 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:12,198 INFO L353 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:12,198 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1956642577, now seen corresponding path program 40 times [2018-07-23 23:35:12,198 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:12,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:12,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:12,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:12,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-07-23 23:35:12,981 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:12,981 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:12,988 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:35:13,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:35:13,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:13,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-07-23 23:35:13,168 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:13,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-07-23 23:35:13,169 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:35:13,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:35:13,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:35:13,170 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 44 states. [2018-07-23 23:35:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:13,497 INFO L93 Difference]: Finished difference Result 399 states and 401 transitions. [2018-07-23 23:35:13,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:35:13,497 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 256 [2018-07-23 23:35:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:13,499 INFO L225 Difference]: With dead ends: 399 [2018-07-23 23:35:13,499 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 23:35:13,500 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:35:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 23:35:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 260. [2018-07-23 23:35:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-07-23 23:35:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2018-07-23 23:35:13,504 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 256 [2018-07-23 23:35:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:13,505 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2018-07-23 23:35:13,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:35:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2018-07-23 23:35:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-07-23 23:35:13,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:13,506 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:13,507 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1890389267, now seen corresponding path program 41 times [2018-07-23 23:35:13,507 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:13,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:13,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-07-23 23:35:15,509 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:15,509 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:15,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:35:16,276 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-07-23 23:35:16,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:16,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-07-23 23:35:16,366 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:16,367 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-07-23 23:35:16,367 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:35:16,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:35:16,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:35:16,370 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand 45 states. [2018-07-23 23:35:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:16,739 INFO L93 Difference]: Finished difference Result 409 states and 411 transitions. [2018-07-23 23:35:16,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:35:16,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 259 [2018-07-23 23:35:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:16,741 INFO L225 Difference]: With dead ends: 409 [2018-07-23 23:35:16,742 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 23:35:16,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:35:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 23:35:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 263. [2018-07-23 23:35:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 23:35:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-07-23 23:35:16,747 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 259 [2018-07-23 23:35:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:16,747 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-07-23 23:35:16,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:35:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-07-23 23:35:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 23:35:16,749 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:16,749 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:16,749 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash -471980079, now seen corresponding path program 42 times [2018-07-23 23:35:16,749 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:16,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5337 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-07-23 23:35:17,874 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:17,874 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:17,883 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:35:18,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-07-23 23:35:18,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:18,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5337 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-07-23 23:35:18,928 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:18,928 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-07-23 23:35:18,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:35:18,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:35:18,929 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:35:18,930 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 47 states. [2018-07-23 23:35:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:19,383 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2018-07-23 23:35:19,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:35:19,383 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 262 [2018-07-23 23:35:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:19,385 INFO L225 Difference]: With dead ends: 413 [2018-07-23 23:35:19,386 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 23:35:19,387 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1055, Invalid=1395, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:35:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 23:35:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2018-07-23 23:35:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 23:35:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-07-23 23:35:19,391 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 262 [2018-07-23 23:35:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:19,391 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-07-23 23:35:19,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:35:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-07-23 23:35:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 23:35:19,393 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:19,393 INFO L353 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:19,393 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash 596881684, now seen corresponding path program 43 times [2018-07-23 23:35:19,394 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:19,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:19,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:19,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:19,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-07-23 23:35:20,643 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:20,643 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:20,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:20,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-07-23 23:35:20,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:20,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-07-23 23:35:20,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:35:20,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:35:20,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:35:20,815 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 47 states. [2018-07-23 23:35:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:21,198 INFO L93 Difference]: Finished difference Result 426 states and 428 transitions. [2018-07-23 23:35:21,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:35:21,199 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 274 [2018-07-23 23:35:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:21,201 INFO L225 Difference]: With dead ends: 426 [2018-07-23 23:35:21,201 INFO L226 Difference]: Without dead ends: 287 [2018-07-23 23:35:21,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:35:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-23 23:35:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 278. [2018-07-23 23:35:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-07-23 23:35:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 279 transitions. [2018-07-23 23:35:21,205 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 279 transitions. Word has length 274 [2018-07-23 23:35:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:21,206 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 279 transitions. [2018-07-23 23:35:21,206 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:35:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 279 transitions. [2018-07-23 23:35:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-23 23:35:21,207 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:21,207 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:21,207 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash 51249814, now seen corresponding path program 44 times [2018-07-23 23:35:21,208 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:21,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:21,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:21,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:21,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-07-23 23:35:22,147 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:22,147 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:22,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:35:22,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:35:22,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:22,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-07-23 23:35:22,306 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:22,307 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-07-23 23:35:22,307 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:35:22,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:35:22,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:35:22,308 INFO L87 Difference]: Start difference. First operand 278 states and 279 transitions. Second operand 48 states. [2018-07-23 23:35:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:22,739 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2018-07-23 23:35:22,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:35:22,739 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 277 [2018-07-23 23:35:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:22,741 INFO L225 Difference]: With dead ends: 436 [2018-07-23 23:35:22,741 INFO L226 Difference]: Without dead ends: 297 [2018-07-23 23:35:22,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:35:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-07-23 23:35:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2018-07-23 23:35:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 23:35:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-07-23 23:35:22,746 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 277 [2018-07-23 23:35:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:22,747 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-07-23 23:35:22,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:35:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-07-23 23:35:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 23:35:22,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:22,748 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:22,749 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1583426004, now seen corresponding path program 45 times [2018-07-23 23:35:22,749 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:22,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:22,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:22,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:22,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6123 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-07-23 23:35:23,814 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:23,814 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:35:23,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:35:26,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-07-23 23:35:26,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:26,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:26,739 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-07-23 23:35:26,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-23 23:35:26,749 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-23 23:35:26,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 Received shutdown request... [2018-07-23 23:38:51,223 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-23 23:38:51,424 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:38:51,425 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 23:38:51,430 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 23:38:51,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:38:51 BoogieIcfgContainer [2018-07-23 23:38:51,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:38:51,431 INFO L168 Benchmark]: Toolchain (without parser) took 267621.26 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -915.5 MB). Peak memory consumption was 352.7 MB. Max. memory is 7.1 GB. [2018-07-23 23:38:51,433 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:38:51,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:38:51,433 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:38:51,434 INFO L168 Benchmark]: Boogie Preprocessor took 23.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:38:51,434 INFO L168 Benchmark]: RCFGBuilder took 347.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -792.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-07-23 23:38:51,435 INFO L168 Benchmark]: TraceAbstraction took 266951.86 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 515.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -133.3 MB). Peak memory consumption was 382.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:38:51,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -792.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 266951.86 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 515.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -133.3 MB). Peak memory consumption was 382.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 6]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 6). Cancelled while BasicCegarLoop was analyzing trace of length 281 with TraceHistMax 47, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 87 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. TIMEOUT Result, 266.8s OverallTime, 49 OverallIterations, 47 TraceHistogramMax, 17.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 394 SDtfs, 4165 SDslu, 4607 SDs, 0 SdLazy, 7105 SolverSat, 1422 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7589 GetRequests, 6452 SyntacticMatches, 0 SemanticMatches, 1137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 27.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=281occurred in iteration=48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 48 MinimizatonAttempts, 693 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 29.3s InterpolantComputationTime, 12856 NumberOfCodeBlocks, 12775 NumberOfCodeBlocksAsserted, 578 NumberOfCheckSat, 12763 ConstructedInterpolants, 0 QuantifiedInterpolants, 4690531 SizeOfPredicates, 65 NumberOfNonLiveVariables, 11764 ConjunctsInSsa, 1142 ConjunctsInUnsatCore, 93 InterpolantComputations, 3 PerfectInterpolantSequences, 87062/180119 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array_true-unreach-call4_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-38-51-451.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array_true-unreach-call4_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-38-51-451.csv Completed graceful shutdown