java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 17:13:25,179 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 17:13:25,181 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 17:13:25,193 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 17:13:25,194 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 17:13:25,195 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 17:13:25,196 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 17:13:25,198 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 17:13:25,200 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 17:13:25,201 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 17:13:25,202 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 17:13:25,203 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 17:13:25,204 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 17:13:25,205 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 17:13:25,206 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 17:13:25,207 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 17:13:25,208 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 17:13:25,213 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 17:13:25,218 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 17:13:25,220 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 17:13:25,221 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 17:13:25,223 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 17:13:25,225 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 17:13:25,225 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 17:13:25,225 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 17:13:25,226 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 17:13:25,227 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 17:13:25,228 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 17:13:25,229 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 17:13:25,230 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 17:13:25,230 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 17:13:25,231 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 17:13:25,234 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 17:13:25,249 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 17:13:25,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 17:13:25,250 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 17:13:25,250 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 17:13:25,251 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 17:13:25,251 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 17:13:25,251 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 17:13:25,251 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 17:13:25,251 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 17:13:25,252 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 17:13:25,252 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 17:13:25,252 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 17:13:25,252 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 17:13:25,252 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 17:13:25,253 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 17:13:25,253 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 17:13:25,253 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 17:13:25,253 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 17:13:25,253 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 17:13:25,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:13:25,254 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 17:13:25,254 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 17:13:25,254 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 17:13:25,254 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 17:13:25,255 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 17:13:25,255 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 17:13:25,255 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 17:13:25,255 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 17:13:25,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 17:13:25,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 17:13:25,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 17:13:25,326 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 17:13:25,327 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 17:13:25,328 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-10-23 17:13:25,389 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abac7f5ff/91cf6c86c7fa4a60985e66636debd3a0/FLAG9cff2865f [2018-10-23 17:13:26,073 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 17:13:26,074 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-10-23 17:13:26,092 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abac7f5ff/91cf6c86c7fa4a60985e66636debd3a0/FLAG9cff2865f [2018-10-23 17:13:26,110 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abac7f5ff/91cf6c86c7fa4a60985e66636debd3a0 [2018-10-23 17:13:26,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 17:13:26,125 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 17:13:26,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 17:13:26,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 17:13:26,130 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 17:13:26,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:13:26" (1/1) ... [2018-10-23 17:13:26,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1597294d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:26, skipping insertion in model container [2018-10-23 17:13:26,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:13:26" (1/1) ... [2018-10-23 17:13:26,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 17:13:26,229 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 17:13:26,986 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:13:26,993 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 17:13:27,277 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:13:27,305 INFO L193 MainTranslator]: Completed translation [2018-10-23 17:13:27,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27 WrapperNode [2018-10-23 17:13:27,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 17:13:27,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 17:13:27,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 17:13:27,307 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 17:13:27,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 17:13:27,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 17:13:27,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 17:13:27,654 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 17:13:27,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... [2018-10-23 17:13:27,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 17:13:27,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 17:13:27,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 17:13:27,804 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 17:13:27,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 17:13:27,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 17:13:27,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 17:13:27,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 17:13:33,036 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 17:13:33,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:13:33 BoogieIcfgContainer [2018-10-23 17:13:33,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 17:13:33,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 17:13:33,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 17:13:33,042 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 17:13:33,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:13:26" (1/3) ... [2018-10-23 17:13:33,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32413296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:13:33, skipping insertion in model container [2018-10-23 17:13:33,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:27" (2/3) ... [2018-10-23 17:13:33,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32413296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:13:33, skipping insertion in model container [2018-10-23 17:13:33,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:13:33" (3/3) ... [2018-10-23 17:13:33,045 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28_false-unreach-call.c [2018-10-23 17:13:33,055 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 17:13:33,065 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 17:13:33,083 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 17:13:33,120 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 17:13:33,121 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 17:13:33,121 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 17:13:33,122 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 17:13:33,122 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 17:13:33,122 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 17:13:33,122 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 17:13:33,122 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 17:13:33,122 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 17:13:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-23 17:13:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-23 17:13:33,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:33,166 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:33,168 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:33,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1324610274, now seen corresponding path program 1 times [2018-10-23 17:13:33,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:33,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:33,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:33,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:33,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:13:34,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:34,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:13:34,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:13:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:13:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:13:34,148 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-23 17:13:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:37,584 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-10-23 17:13:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:13:37,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2018-10-23 17:13:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:37,613 INFO L225 Difference]: With dead ends: 1027 [2018-10-23 17:13:37,613 INFO L226 Difference]: Without dead ends: 717 [2018-10-23 17:13:37,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:13:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-10-23 17:13:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-10-23 17:13:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-10-23 17:13:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-10-23 17:13:37,723 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 153 [2018-10-23 17:13:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:37,727 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-10-23 17:13:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:13:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-10-23 17:13:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-23 17:13:37,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:37,743 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:37,743 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:37,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash 729772227, now seen corresponding path program 1 times [2018-10-23 17:13:37,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:37,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:37,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:37,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:37,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:13:37,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:37,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:13:37,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:13:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:13:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:13:37,999 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-10-23 17:13:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:39,764 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-10-23 17:13:39,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:13:39,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-10-23 17:13:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:39,773 INFO L225 Difference]: With dead ends: 2058 [2018-10-23 17:13:39,774 INFO L226 Difference]: Without dead ends: 1345 [2018-10-23 17:13:39,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:13:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-10-23 17:13:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-10-23 17:13:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-23 17:13:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-10-23 17:13:39,855 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 162 [2018-10-23 17:13:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:39,856 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-10-23 17:13:39,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:13:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-10-23 17:13:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-23 17:13:39,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:39,860 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:39,861 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:39,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash -292716689, now seen corresponding path program 1 times [2018-10-23 17:13:39,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:39,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:39,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:39,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:39,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:13:40,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:40,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:13:40,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:13:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:13:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:13:40,082 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-10-23 17:13:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:43,816 INFO L93 Difference]: Finished difference Result 3891 states and 6117 transitions. [2018-10-23 17:13:43,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:13:43,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-10-23 17:13:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:43,832 INFO L225 Difference]: With dead ends: 3891 [2018-10-23 17:13:43,833 INFO L226 Difference]: Without dead ends: 2562 [2018-10-23 17:13:43,836 INFO L605 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 [2018-10-23 17:13:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2018-10-23 17:13:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2557. [2018-10-23 17:13:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2557 states. [2018-10-23 17:13:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3774 transitions. [2018-10-23 17:13:43,894 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3774 transitions. Word has length 170 [2018-10-23 17:13:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:43,895 INFO L481 AbstractCegarLoop]: Abstraction has 2557 states and 3774 transitions. [2018-10-23 17:13:43,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:13:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3774 transitions. [2018-10-23 17:13:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-23 17:13:43,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:43,902 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:43,903 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:43,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2000314268, now seen corresponding path program 1 times [2018-10-23 17:13:43,903 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:43,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:43,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:43,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:43,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:13:44,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:44,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:13:44,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:13:44,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:13:44,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:13:44,130 INFO L87 Difference]: Start difference. First operand 2557 states and 3774 transitions. Second operand 3 states. [2018-10-23 17:13:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:46,407 INFO L93 Difference]: Finished difference Result 6396 states and 9368 transitions. [2018-10-23 17:13:46,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:13:46,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 182 [2018-10-23 17:13:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:46,429 INFO L225 Difference]: With dead ends: 6396 [2018-10-23 17:13:46,429 INFO L226 Difference]: Without dead ends: 3841 [2018-10-23 17:13:46,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:13:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2018-10-23 17:13:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3837. [2018-10-23 17:13:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3837 states. [2018-10-23 17:13:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 5572 transitions. [2018-10-23 17:13:46,519 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 5572 transitions. Word has length 182 [2018-10-23 17:13:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:46,520 INFO L481 AbstractCegarLoop]: Abstraction has 3837 states and 5572 transitions. [2018-10-23 17:13:46,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:13:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 5572 transitions. [2018-10-23 17:13:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-23 17:13:46,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:46,529 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:46,530 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:46,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash -75866040, now seen corresponding path program 1 times [2018-10-23 17:13:46,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:46,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:46,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:46,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:46,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:46,881 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 17:13:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:13:47,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:13:47,070 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 17:13:47,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:47,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:13:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:13:47,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:13:47,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 17:13:47,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 17:13:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 17:13:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 17:13:47,388 INFO L87 Difference]: Start difference. First operand 3837 states and 5572 transitions. Second operand 6 states. [2018-10-23 17:13:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:53,701 INFO L93 Difference]: Finished difference Result 24481 states and 35515 transitions. [2018-10-23 17:13:53,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 17:13:53,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-10-23 17:13:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:53,788 INFO L225 Difference]: With dead ends: 24481 [2018-10-23 17:13:53,789 INFO L226 Difference]: Without dead ends: 20646 [2018-10-23 17:13:53,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-23 17:13:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20646 states. [2018-10-23 17:13:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20646 to 20571. [2018-10-23 17:13:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20571 states. [2018-10-23 17:13:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20571 states to 20571 states and 27034 transitions. [2018-10-23 17:13:54,157 INFO L78 Accepts]: Start accepts. Automaton has 20571 states and 27034 transitions. Word has length 190 [2018-10-23 17:13:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:54,158 INFO L481 AbstractCegarLoop]: Abstraction has 20571 states and 27034 transitions. [2018-10-23 17:13:54,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 17:13:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20571 states and 27034 transitions. [2018-10-23 17:13:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-23 17:13:54,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:54,198 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:54,199 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:54,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -441917383, now seen corresponding path program 1 times [2018-10-23 17:13:54,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:54,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:54,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:54,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:54,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-10-23 17:13:54,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:54,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:13:54,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:13:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:13:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:13:54,613 INFO L87 Difference]: Start difference. First operand 20571 states and 27034 transitions. Second operand 4 states. [2018-10-23 17:13:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:13:56,828 INFO L93 Difference]: Finished difference Result 74750 states and 98801 transitions. [2018-10-23 17:13:56,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:13:56,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2018-10-23 17:13:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:13:56,963 INFO L225 Difference]: With dead ends: 74750 [2018-10-23 17:13:56,963 INFO L226 Difference]: Without dead ends: 54181 [2018-10-23 17:13:56,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:13:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54181 states. [2018-10-23 17:13:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54181 to 37932. [2018-10-23 17:13:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37932 states. [2018-10-23 17:13:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37932 states to 37932 states and 48172 transitions. [2018-10-23 17:13:57,609 INFO L78 Accepts]: Start accepts. Automaton has 37932 states and 48172 transitions. Word has length 221 [2018-10-23 17:13:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:13:57,610 INFO L481 AbstractCegarLoop]: Abstraction has 37932 states and 48172 transitions. [2018-10-23 17:13:57,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:13:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37932 states and 48172 transitions. [2018-10-23 17:13:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-23 17:13:57,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:13:57,654 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:13:57,654 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:13:57,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:13:57,655 INFO L82 PathProgramCache]: Analyzing trace with hash 703323991, now seen corresponding path program 1 times [2018-10-23 17:13:57,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:13:57,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:13:57,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:57,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:13:57,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:13:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:13:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:13:58,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:13:58,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:13:58,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:13:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:13:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:13:58,039 INFO L87 Difference]: Start difference. First operand 37932 states and 48172 transitions. Second operand 5 states. [2018-10-23 17:14:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:01,642 INFO L93 Difference]: Finished difference Result 126163 states and 159704 transitions. [2018-10-23 17:14:01,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:14:01,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2018-10-23 17:14:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:01,842 INFO L225 Difference]: With dead ends: 126163 [2018-10-23 17:14:01,843 INFO L226 Difference]: Without dead ends: 88233 [2018-10-23 17:14:01,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:14:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88233 states. [2018-10-23 17:14:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88233 to 88220. [2018-10-23 17:14:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88220 states. [2018-10-23 17:14:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88220 states to 88220 states and 108664 transitions. [2018-10-23 17:14:02,992 INFO L78 Accepts]: Start accepts. Automaton has 88220 states and 108664 transitions. Word has length 225 [2018-10-23 17:14:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:02,992 INFO L481 AbstractCegarLoop]: Abstraction has 88220 states and 108664 transitions. [2018-10-23 17:14:02,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:14:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 88220 states and 108664 transitions. [2018-10-23 17:14:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-23 17:14:03,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:03,060 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:03,060 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:03,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2089000476, now seen corresponding path program 1 times [2018-10-23 17:14:03,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:03,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:03,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:03,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:03,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-23 17:14:03,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:03,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:14:03,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:03,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:03,276 INFO L87 Difference]: Start difference. First operand 88220 states and 108664 transitions. Second operand 3 states. [2018-10-23 17:14:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:04,904 INFO L93 Difference]: Finished difference Result 168731 states and 207345 transitions. [2018-10-23 17:14:04,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:04,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2018-10-23 17:14:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:04,983 INFO L225 Difference]: With dead ends: 168731 [2018-10-23 17:14:04,983 INFO L226 Difference]: Without dead ends: 80513 [2018-10-23 17:14:05,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80513 states. [2018-10-23 17:14:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80513 to 80513. [2018-10-23 17:14:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80513 states. [2018-10-23 17:14:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80513 states to 80513 states and 97363 transitions. [2018-10-23 17:14:05,847 INFO L78 Accepts]: Start accepts. Automaton has 80513 states and 97363 transitions. Word has length 264 [2018-10-23 17:14:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:05,847 INFO L481 AbstractCegarLoop]: Abstraction has 80513 states and 97363 transitions. [2018-10-23 17:14:05,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 80513 states and 97363 transitions. [2018-10-23 17:14:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-23 17:14:05,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:05,874 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:05,874 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:05,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1369324177, now seen corresponding path program 1 times [2018-10-23 17:14:05,875 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:05,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:05,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:05,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:05,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-23 17:14:06,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:06,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:06,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:06,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:06,219 INFO L87 Difference]: Start difference. First operand 80513 states and 97363 transitions. Second operand 4 states. [2018-10-23 17:14:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:08,482 INFO L93 Difference]: Finished difference Result 158145 states and 191328 transitions. [2018-10-23 17:14:08,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:08,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 279 [2018-10-23 17:14:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:08,570 INFO L225 Difference]: With dead ends: 158145 [2018-10-23 17:14:08,571 INFO L226 Difference]: Without dead ends: 77634 [2018-10-23 17:14:08,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77634 states. [2018-10-23 17:14:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77634 to 76410. [2018-10-23 17:14:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76410 states. [2018-10-23 17:14:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76410 states to 76410 states and 87917 transitions. [2018-10-23 17:14:09,571 INFO L78 Accepts]: Start accepts. Automaton has 76410 states and 87917 transitions. Word has length 279 [2018-10-23 17:14:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:09,571 INFO L481 AbstractCegarLoop]: Abstraction has 76410 states and 87917 transitions. [2018-10-23 17:14:09,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 76410 states and 87917 transitions. [2018-10-23 17:14:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-23 17:14:09,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:09,597 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:09,597 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:09,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash 797567040, now seen corresponding path program 1 times [2018-10-23 17:14:09,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:09,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:09,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:09,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:09,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-10-23 17:14:09,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:09,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:09,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:09,990 INFO L87 Difference]: Start difference. First operand 76410 states and 87917 transitions. Second operand 4 states. [2018-10-23 17:14:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:12,966 INFO L93 Difference]: Finished difference Result 278773 states and 320534 transitions. [2018-10-23 17:14:12,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:12,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 292 [2018-10-23 17:14:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:13,206 INFO L225 Difference]: With dead ends: 278773 [2018-10-23 17:14:13,206 INFO L226 Difference]: Without dead ends: 202365 [2018-10-23 17:14:13,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202365 states. [2018-10-23 17:14:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202365 to 199070. [2018-10-23 17:14:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199070 states. [2018-10-23 17:14:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199070 states to 199070 states and 228706 transitions. [2018-10-23 17:14:16,290 INFO L78 Accepts]: Start accepts. Automaton has 199070 states and 228706 transitions. Word has length 292 [2018-10-23 17:14:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:16,291 INFO L481 AbstractCegarLoop]: Abstraction has 199070 states and 228706 transitions. [2018-10-23 17:14:16,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 199070 states and 228706 transitions. [2018-10-23 17:14:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-23 17:14:16,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:16,308 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:16,309 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:16,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1732862087, now seen corresponding path program 1 times [2018-10-23 17:14:16,309 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:16,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:16,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:16,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:16,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:14:16,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:16,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:16,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:16,784 INFO L87 Difference]: Start difference. First operand 199070 states and 228706 transitions. Second operand 4 states. [2018-10-23 17:14:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:21,275 INFO L93 Difference]: Finished difference Result 468936 states and 535642 transitions. [2018-10-23 17:14:21,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:21,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2018-10-23 17:14:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:21,616 INFO L225 Difference]: With dead ends: 468936 [2018-10-23 17:14:21,617 INFO L226 Difference]: Without dead ends: 269868 [2018-10-23 17:14:21,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269868 states. [2018-10-23 17:14:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269868 to 269437. [2018-10-23 17:14:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269437 states. [2018-10-23 17:14:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269437 states to 269437 states and 302663 transitions. [2018-10-23 17:14:25,997 INFO L78 Accepts]: Start accepts. Automaton has 269437 states and 302663 transitions. Word has length 305 [2018-10-23 17:14:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:25,997 INFO L481 AbstractCegarLoop]: Abstraction has 269437 states and 302663 transitions. [2018-10-23 17:14:25,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 269437 states and 302663 transitions. [2018-10-23 17:14:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-10-23 17:14:26,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:26,026 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:26,027 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:26,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 179923740, now seen corresponding path program 1 times [2018-10-23 17:14:26,027 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:26,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:26,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:26,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-10-23 17:14:26,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:26,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:26,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:26,472 INFO L87 Difference]: Start difference. First operand 269437 states and 302663 transitions. Second operand 4 states. [2018-10-23 17:14:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:30,408 INFO L93 Difference]: Finished difference Result 540775 states and 607217 transitions. [2018-10-23 17:14:30,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:30,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2018-10-23 17:14:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:30,785 INFO L225 Difference]: With dead ends: 540775 [2018-10-23 17:14:30,785 INFO L226 Difference]: Without dead ends: 271340 [2018-10-23 17:14:30,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271340 states. [2018-10-23 17:14:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271340 to 268580. [2018-10-23 17:14:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268580 states. [2018-10-23 17:14:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268580 states to 268580 states and 299186 transitions. [2018-10-23 17:14:41,285 INFO L78 Accepts]: Start accepts. Automaton has 268580 states and 299186 transitions. Word has length 348 [2018-10-23 17:14:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:41,285 INFO L481 AbstractCegarLoop]: Abstraction has 268580 states and 299186 transitions. [2018-10-23 17:14:41,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 268580 states and 299186 transitions. [2018-10-23 17:14:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-23 17:14:41,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:41,322 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:41,322 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:41,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2075183857, now seen corresponding path program 1 times [2018-10-23 17:14:41,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:41,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:41,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:41,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:41,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:41,834 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 17:14:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-23 17:14:41,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:41,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:14:41,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:14:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:14:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:14:41,963 INFO L87 Difference]: Start difference. First operand 268580 states and 299186 transitions. Second operand 5 states. [2018-10-23 17:14:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:47,455 INFO L93 Difference]: Finished difference Result 679334 states and 758132 transitions. [2018-10-23 17:14:47,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:14:47,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2018-10-23 17:14:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:49,293 INFO L225 Difference]: With dead ends: 679334 [2018-10-23 17:14:49,293 INFO L226 Difference]: Without dead ends: 410756 [2018-10-23 17:14:49,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:14:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410756 states. [2018-10-23 17:14:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410756 to 406579. [2018-10-23 17:14:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406579 states. [2018-10-23 17:14:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406579 states to 406579 states and 452962 transitions. [2018-10-23 17:14:54,969 INFO L78 Accepts]: Start accepts. Automaton has 406579 states and 452962 transitions. Word has length 368 [2018-10-23 17:14:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:54,970 INFO L481 AbstractCegarLoop]: Abstraction has 406579 states and 452962 transitions. [2018-10-23 17:14:54,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:14:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 406579 states and 452962 transitions. [2018-10-23 17:14:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-23 17:14:54,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:54,999 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:54,999 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:55,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1022522118, now seen corresponding path program 1 times [2018-10-23 17:14:55,000 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:55,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:55,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:55,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:55,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:14:56,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:56,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:14:56,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:56,594 INFO L87 Difference]: Start difference. First operand 406579 states and 452962 transitions. Second operand 4 states. [2018-10-23 17:15:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:02,600 INFO L93 Difference]: Finished difference Result 824115 states and 918045 transitions. [2018-10-23 17:15:02,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:15:02,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2018-10-23 17:15:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:03,102 INFO L225 Difference]: With dead ends: 824115 [2018-10-23 17:15:03,102 INFO L226 Difference]: Without dead ends: 417538 [2018-10-23 17:15:03,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417538 states. [2018-10-23 17:15:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417538 to 396314. [2018-10-23 17:15:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396314 states. [2018-10-23 17:15:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396314 states to 396314 states and 440012 transitions. [2018-10-23 17:15:15,014 INFO L78 Accepts]: Start accepts. Automaton has 396314 states and 440012 transitions. Word has length 368 [2018-10-23 17:15:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:15,014 INFO L481 AbstractCegarLoop]: Abstraction has 396314 states and 440012 transitions. [2018-10-23 17:15:15,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:15:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 396314 states and 440012 transitions. [2018-10-23 17:15:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-23 17:15:15,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:15,041 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:15:15,042 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:15,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1775015508, now seen corresponding path program 1 times [2018-10-23 17:15:15,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:15,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-23 17:15:16,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:15:16,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:15:16,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:15:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:15:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:16,403 INFO L87 Difference]: Start difference. First operand 396314 states and 440012 transitions. Second operand 4 states. [2018-10-23 17:15:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:22,116 INFO L93 Difference]: Finished difference Result 811128 states and 901067 transitions. [2018-10-23 17:15:22,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:15:22,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 375 [2018-10-23 17:15:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:22,705 INFO L225 Difference]: With dead ends: 811128 [2018-10-23 17:15:22,705 INFO L226 Difference]: Without dead ends: 392272 [2018-10-23 17:15:22,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392272 states. [2018-10-23 17:15:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392272 to 321262. [2018-10-23 17:15:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321262 states. [2018-10-23 17:15:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321262 states to 321262 states and 350128 transitions. [2018-10-23 17:15:28,110 INFO L78 Accepts]: Start accepts. Automaton has 321262 states and 350128 transitions. Word has length 375 [2018-10-23 17:15:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:28,110 INFO L481 AbstractCegarLoop]: Abstraction has 321262 states and 350128 transitions. [2018-10-23 17:15:28,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:15:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 321262 states and 350128 transitions. [2018-10-23 17:15:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-10-23 17:15:28,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:28,133 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:15:28,133 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:28,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1461030302, now seen corresponding path program 1 times [2018-10-23 17:15:28,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:28,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:28,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:28,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:28,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 347 proven. 32 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-23 17:15:28,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:15:28,592 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 17:15:28,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:28,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:15:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-23 17:15:29,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:15:29,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-23 17:15:29,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:15:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:15:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:29,741 INFO L87 Difference]: Start difference. First operand 321262 states and 350128 transitions. Second operand 4 states. [2018-10-23 17:15:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:37,178 INFO L93 Difference]: Finished difference Result 1119387 states and 1215646 transitions. [2018-10-23 17:15:37,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:15:37,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2018-10-23 17:15:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:38,495 INFO L225 Difference]: With dead ends: 1119387 [2018-10-23 17:15:38,496 INFO L226 Difference]: Without dead ends: 798127 [2018-10-23 17:15:38,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798127 states. [2018-10-23 17:15:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798127 to 534707. [2018-10-23 17:15:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534707 states. [2018-10-23 17:15:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534707 states to 534707 states and 579768 transitions. [2018-10-23 17:15:55,760 INFO L78 Accepts]: Start accepts. Automaton has 534707 states and 579768 transitions. Word has length 420 [2018-10-23 17:15:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:55,761 INFO L481 AbstractCegarLoop]: Abstraction has 534707 states and 579768 transitions. [2018-10-23 17:15:55,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:15:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 534707 states and 579768 transitions. [2018-10-23 17:15:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-10-23 17:15:55,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:55,845 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:15:55,845 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:55,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash 235689142, now seen corresponding path program 1 times [2018-10-23 17:15:55,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:55,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:55,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:55,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:55,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:56,422 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 17:15:56,606 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 17:15:56,866 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 17:15:57,093 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 17:15:57,291 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-23 17:15:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 352 proven. 77 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-10-23 17:15:59,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:15:59,357 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 17:15:59,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:59,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:15:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-10-23 17:15:59,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:15:59,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-23 17:15:59,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 17:15:59,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 17:15:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-23 17:15:59,884 INFO L87 Difference]: Start difference. First operand 534707 states and 579768 transitions. Second operand 11 states. [2018-10-23 17:16:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:16:24,703 INFO L93 Difference]: Finished difference Result 2241898 states and 2422963 transitions. [2018-10-23 17:16:24,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 17:16:24,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 427 [2018-10-23 17:16:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:16:29,582 INFO L225 Difference]: With dead ends: 2241898 [2018-10-23 17:16:29,583 INFO L226 Difference]: Without dead ends: 1707193 [2018-10-23 17:16:29,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-10-23 17:16:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707193 states. Received shutdown request... [2018-10-23 17:16:49,785 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 17:16:49,789 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 17:16:49,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:16:49 BoogieIcfgContainer [2018-10-23 17:16:49,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 17:16:49,790 INFO L168 Benchmark]: Toolchain (without parser) took 203666.48 ms. Allocated memory was 1.5 GB in the beginning and 7.2 GB in the end (delta: 5.6 GB). Free memory was 1.4 GB in the beginning and 5.0 GB in the end (delta: -3.5 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,791 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-10-23 17:16:49,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1180.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,792 INFO L168 Benchmark]: Boogie Procedure Inliner took 346.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -873.8 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,793 INFO L168 Benchmark]: Boogie Preprocessor took 149.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,794 INFO L168 Benchmark]: RCFGBuilder took 5234.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 254.2 MB). Peak memory consumption was 254.2 MB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,795 INFO L168 Benchmark]: TraceAbstraction took 196751.06 ms. Allocated memory was 2.3 GB in the beginning and 7.2 GB in the end (delta: 4.9 GB). Free memory was 2.0 GB in the beginning and 5.0 GB in the end (delta: -3.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. [2018-10-23 17:16:49,800 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 1180.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 346.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -873.8 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5234.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 254.2 MB). Peak memory consumption was 254.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 196751.06 ms. Allocated memory was 2.3 GB in the beginning and 7.2 GB in the end (delta: 4.9 GB). Free memory was 2.0 GB in the beginning and 5.0 GB in the end (delta: -3.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1491]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1491). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 303 locations, 1 error locations. TIMEOUT Result, 196.6s OverallTime, 17 OverallIterations, 6 TraceHistogramMax, 100.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4019 SDtfs, 14658 SDslu, 4698 SDs, 0 SdLazy, 25856 SolverSat, 4903 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1127 GetRequests, 1067 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=534707occurred in iteration=16, 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: 81.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 383903 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 5786 NumberOfCodeBlocks, 5786 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 5766 ConstructedInterpolants, 0 QuantifiedInterpolants, 5832016 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1826 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 4504/4617 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown