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_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 18:21:38,086 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 18:21:38,088 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 18:21:38,102 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 18:21:38,102 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 18:21:38,103 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 18:21:38,104 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 18:21:38,107 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 18:21:38,109 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 18:21:38,111 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 18:21:38,113 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 18:21:38,114 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 18:21:38,115 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 18:21:38,116 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 18:21:38,123 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 18:21:38,124 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 18:21:38,127 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 18:21:38,129 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 18:21:38,135 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 18:21:38,139 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 18:21:38,141 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 18:21:38,143 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 18:21:38,145 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 18:21:38,146 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 18:21:38,147 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 18:21:38,148 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 18:21:38,148 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 18:21:38,151 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 18:21:38,153 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 18:21:38,156 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 18:21:38,156 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 18:21:38,158 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 18:21:38,160 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 [2018-10-26 18:21:38,189 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 18:21:38,190 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 18:21:38,191 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 18:21:38,191 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 18:21:38,194 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 18:21:38,195 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 18:21:38,195 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 18:21:38,195 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 18:21:38,195 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 18:21:38,195 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 18:21:38,196 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 18:21:38,196 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 18:21:38,196 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 18:21:38,196 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 18:21:38,196 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 18:21:38,196 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 18:21:38,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 18:21:38,198 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 18:21:38,198 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 18:21:38,198 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 18:21:38,198 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 18:21:38,199 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 18:21:38,199 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 18:21:38,199 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 18:21:38,199 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 18:21:38,200 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 18:21:38,200 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 18:21:38,200 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 18:21:38,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 18:21:38,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 18:21:38,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 18:21:38,283 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 18:21:38,285 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 18:21:38,285 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-10-26 18:21:38,360 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a799ed779/4707b06704d041f0ba027f1e8f5e0f52/FLAGec931668c [2018-10-26 18:21:39,055 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 18:21:39,056 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-10-26 18:21:39,085 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a799ed779/4707b06704d041f0ba027f1e8f5e0f52/FLAGec931668c [2018-10-26 18:21:39,107 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a799ed779/4707b06704d041f0ba027f1e8f5e0f52 [2018-10-26 18:21:39,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 18:21:39,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 18:21:39,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 18:21:39,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 18:21:39,130 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 18:21:39,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:21:39" (1/1) ... [2018-10-26 18:21:39,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedfbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:39, skipping insertion in model container [2018-10-26 18:21:39,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:21:39" (1/1) ... [2018-10-26 18:21:39,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 18:21:39,252 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 18:21:40,034 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 18:21:40,040 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 18:21:40,287 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 18:21:40,309 INFO L193 MainTranslator]: Completed translation [2018-10-26 18:21:40,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40 WrapperNode [2018-10-26 18:21:40,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 18:21:40,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 18:21:40,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 18:21:40,312 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 18:21:40,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 18:21:40,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 18:21:40,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 18:21:40,602 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 18:21:40,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (1/1) ... [2018-10-26 18:21:40,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 18:21:40,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 18:21:40,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 18:21:40,738 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 18:21:40,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (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 [2018-10-26 18:21:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 18:21:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 18:21:40,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 18:21:46,398 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 18:21:46,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:21:46 BoogieIcfgContainer [2018-10-26 18:21:46,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 18:21:46,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 18:21:46,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 18:21:46,404 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 18:21:46,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:21:39" (1/3) ... [2018-10-26 18:21:46,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:21:46, skipping insertion in model container [2018-10-26 18:21:46,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:21:40" (2/3) ... [2018-10-26 18:21:46,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:21:46, skipping insertion in model container [2018-10-26 18:21:46,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:21:46" (3/3) ... [2018-10-26 18:21:46,409 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13_false-unreach-call.c [2018-10-26 18:21:46,419 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 18:21:46,428 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 18:21:46,446 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 18:21:46,484 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 18:21:46,485 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 18:21:46,485 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 18:21:46,485 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 18:21:46,486 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 18:21:46,486 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 18:21:46,486 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 18:21:46,486 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 18:21:46,486 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 18:21:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-26 18:21:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-26 18:21:46,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:21:46,534 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, 1, 1, 1] [2018-10-26 18:21:46,536 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:21:46,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:21:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -689951132, now seen corresponding path program 1 times [2018-10-26 18:21:46,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:21:46,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:21:46,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:46,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:21:46,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:21:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 18:21:47,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:21:47,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:21:47,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:21:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:21:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:21:47,563 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-26 18:21:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:21:51,575 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-10-26 18:21:51,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:21:51,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2018-10-26 18:21:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:21:51,603 INFO L225 Difference]: With dead ends: 1027 [2018-10-26 18:21:51,603 INFO L226 Difference]: Without dead ends: 717 [2018-10-26 18:21:51,608 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 [2018-10-26 18:21:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-10-26 18:21:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-10-26 18:21:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-10-26 18:21:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-10-26 18:21:51,698 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 156 [2018-10-26 18:21:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:21:51,699 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-10-26 18:21:51,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:21:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-10-26 18:21:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-26 18:21:51,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:21:51,707 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, 1, 1, 1] [2018-10-26 18:21:51,708 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:21:51,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:21:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash -475146013, now seen corresponding path program 1 times [2018-10-26 18:21:51,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:21:51,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:21:51,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:51,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:21:51,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:21:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 18:21:51,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:21:51,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 18:21:51,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:21:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:21:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:21:51,837 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-10-26 18:21:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:21:54,305 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-10-26 18:21:54,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:21:54,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-10-26 18:21:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:21:54,314 INFO L225 Difference]: With dead ends: 2058 [2018-10-26 18:21:54,314 INFO L226 Difference]: Without dead ends: 1345 [2018-10-26 18:21:54,318 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 [2018-10-26 18:21:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-10-26 18:21:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-10-26 18:21:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-26 18:21:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-10-26 18:21:54,391 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 165 [2018-10-26 18:21:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:21:54,392 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-10-26 18:21:54,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:21:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-10-26 18:21:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-26 18:21:54,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:21:54,407 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2018-10-26 18:21:54,407 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:21:54,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:21:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2016048360, now seen corresponding path program 1 times [2018-10-26 18:21:54,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:21:54,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:21:54,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:54,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:21:54,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:21:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-26 18:21:54,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:21:54,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 18:21:54,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:21:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:21:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:21:54,551 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-10-26 18:21:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:21:56,648 INFO L93 Difference]: Finished difference Result 3977 states and 6209 transitions. [2018-10-26 18:21:56,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:21:56,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2018-10-26 18:21:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:21:56,665 INFO L225 Difference]: With dead ends: 3977 [2018-10-26 18:21:56,665 INFO L226 Difference]: Without dead ends: 2648 [2018-10-26 18:21:56,668 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 [2018-10-26 18:21:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2018-10-26 18:21:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2645. [2018-10-26 18:21:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2645 states. [2018-10-26 18:21:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4120 transitions. [2018-10-26 18:21:56,731 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4120 transitions. Word has length 179 [2018-10-26 18:21:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:21:56,732 INFO L481 AbstractCegarLoop]: Abstraction has 2645 states and 4120 transitions. [2018-10-26 18:21:56,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:21:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4120 transitions. [2018-10-26 18:21:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-26 18:21:56,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:21:56,738 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-10-26 18:21:56,739 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:21:56,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:21:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1738970836, now seen corresponding path program 1 times [2018-10-26 18:21:56,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:21:56,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:21:56,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:56,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:21:56,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:21:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 18:21:56,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:21:56,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 18:21:56,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:21:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:21:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:21:56,897 INFO L87 Difference]: Start difference. First operand 2645 states and 4120 transitions. Second operand 3 states. [2018-10-26 18:21:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:21:57,839 INFO L93 Difference]: Finished difference Result 5250 states and 8186 transitions. [2018-10-26 18:21:57,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:21:57,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-10-26 18:21:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:21:57,855 INFO L225 Difference]: With dead ends: 5250 [2018-10-26 18:21:57,856 INFO L226 Difference]: Without dead ends: 2607 [2018-10-26 18:21:57,859 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 [2018-10-26 18:21:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2018-10-26 18:21:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2607. [2018-10-26 18:21:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2018-10-26 18:21:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3992 transitions. [2018-10-26 18:21:57,913 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3992 transitions. Word has length 187 [2018-10-26 18:21:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:21:57,913 INFO L481 AbstractCegarLoop]: Abstraction has 2607 states and 3992 transitions. [2018-10-26 18:21:57,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:21:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3992 transitions. [2018-10-26 18:21:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-26 18:21:57,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:21:57,918 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, 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] [2018-10-26 18:21:57,919 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:21:57,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:21:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -624682400, now seen corresponding path program 1 times [2018-10-26 18:21:57,919 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:21:57,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:21:57,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:57,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:21:57,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:21:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:21:58,449 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-26 18:21:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 18:21:58,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:21:58,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 18:21:58,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 18:21:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 18:21:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 18:21:58,506 INFO L87 Difference]: Start difference. First operand 2607 states and 3992 transitions. Second operand 5 states. [2018-10-26 18:22:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:03,070 INFO L93 Difference]: Finished difference Result 6279 states and 9778 transitions. [2018-10-26 18:22:03,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 18:22:03,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2018-10-26 18:22:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:03,090 INFO L225 Difference]: With dead ends: 6279 [2018-10-26 18:22:03,090 INFO L226 Difference]: Without dead ends: 3674 [2018-10-26 18:22:03,094 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 [2018-10-26 18:22:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2018-10-26 18:22:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3015. [2018-10-26 18:22:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2018-10-26 18:22:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4612 transitions. [2018-10-26 18:22:03,157 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4612 transitions. Word has length 196 [2018-10-26 18:22:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:03,157 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4612 transitions. [2018-10-26 18:22:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 18:22:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4612 transitions. [2018-10-26 18:22:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-26 18:22:03,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:03,164 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:03,164 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:03,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2080281876, now seen corresponding path program 1 times [2018-10-26 18:22:03,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:03,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:03,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:03,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:03,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 18:22:03,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 18:22:03,493 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 [2018-10-26 18:22:03,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:03,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 18:22:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-26 18:22:03,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 18:22:03,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-26 18:22:03,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:22:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:22:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:22:03,790 INFO L87 Difference]: Start difference. First operand 3015 states and 4612 transitions. Second operand 4 states. [2018-10-26 18:22:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:06,856 INFO L93 Difference]: Finished difference Result 12048 states and 18435 transitions. [2018-10-26 18:22:06,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:22:06,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2018-10-26 18:22:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:06,897 INFO L225 Difference]: With dead ends: 12048 [2018-10-26 18:22:06,897 INFO L226 Difference]: Without dead ends: 9035 [2018-10-26 18:22:06,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:22:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2018-10-26 18:22:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 6022. [2018-10-26 18:22:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6022 states. [2018-10-26 18:22:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 9192 transitions. [2018-10-26 18:22:07,057 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 9192 transitions. Word has length 232 [2018-10-26 18:22:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:07,058 INFO L481 AbstractCegarLoop]: Abstraction has 6022 states and 9192 transitions. [2018-10-26 18:22:07,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:22:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 9192 transitions. [2018-10-26 18:22:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-26 18:22:07,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:07,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:07,069 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:07,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1949453061, now seen corresponding path program 1 times [2018-10-26 18:22:07,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:07,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:07,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:07,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:07,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 18:22:07,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:07,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:22:07,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:22:07,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:22:07,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:22:07,333 INFO L87 Difference]: Start difference. First operand 6022 states and 9192 transitions. Second operand 3 states. [2018-10-26 18:22:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:08,908 INFO L93 Difference]: Finished difference Result 17361 states and 26560 transitions. [2018-10-26 18:22:08,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:22:08,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2018-10-26 18:22:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:08,953 INFO L225 Difference]: With dead ends: 17361 [2018-10-26 18:22:08,954 INFO L226 Difference]: Without dead ends: 11341 [2018-10-26 18:22:08,965 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 [2018-10-26 18:22:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2018-10-26 18:22:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11337. [2018-10-26 18:22:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-26 18:22:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 15999 transitions. [2018-10-26 18:22:09,201 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 15999 transitions. Word has length 232 [2018-10-26 18:22:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 15999 transitions. [2018-10-26 18:22:09,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:22:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 15999 transitions. [2018-10-26 18:22:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-26 18:22:09,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:09,217 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 18:22:09,217 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:09,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1292184038, now seen corresponding path program 1 times [2018-10-26 18:22:09,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:09,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:09,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:09,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:09,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:09,682 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 18:22:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 18:22:09,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:09,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:22:09,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:22:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:22:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:22:09,733 INFO L87 Difference]: Start difference. First operand 11337 states and 15999 transitions. Second operand 4 states. [2018-10-26 18:22:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:13,149 INFO L93 Difference]: Finished difference Result 41584 states and 58255 transitions. [2018-10-26 18:22:13,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:22:13,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-10-26 18:22:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:13,222 INFO L225 Difference]: With dead ends: 41584 [2018-10-26 18:22:13,223 INFO L226 Difference]: Without dead ends: 30249 [2018-10-26 18:22:13,243 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 [2018-10-26 18:22:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30249 states. [2018-10-26 18:22:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30249 to 21129. [2018-10-26 18:22:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-26 18:22:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 28285 transitions. [2018-10-26 18:22:13,587 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 28285 transitions. Word has length 235 [2018-10-26 18:22:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:13,587 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 28285 transitions. [2018-10-26 18:22:13,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:22:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 28285 transitions. [2018-10-26 18:22:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-26 18:22:13,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:13,608 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:13,608 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:13,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1803481727, now seen corresponding path program 1 times [2018-10-26 18:22:13,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:13,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:13,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:13,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:13,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 18:22:13,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:13,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:22:13,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:22:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:22:13,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:22:13,762 INFO L87 Difference]: Start difference. First operand 21129 states and 28285 transitions. Second operand 3 states. [2018-10-26 18:22:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:16,042 INFO L93 Difference]: Finished difference Result 42264 states and 56582 transitions. [2018-10-26 18:22:16,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:22:16,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-10-26 18:22:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:16,085 INFO L225 Difference]: With dead ends: 42264 [2018-10-26 18:22:16,085 INFO L226 Difference]: Without dead ends: 21137 [2018-10-26 18:22:16,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:22:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2018-10-26 18:22:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 21129. [2018-10-26 18:22:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-26 18:22:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 25984 transitions. [2018-10-26 18:22:16,606 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 25984 transitions. Word has length 239 [2018-10-26 18:22:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:16,607 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 25984 transitions. [2018-10-26 18:22:16,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:22:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 25984 transitions. [2018-10-26 18:22:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-26 18:22:16,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:16,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:16,623 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:16,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1908645910, now seen corresponding path program 1 times [2018-10-26 18:22:16,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:16,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:16,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:16,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:16,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 18:22:16,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:16,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:22:16,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:22:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:22:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:22:16,903 INFO L87 Difference]: Start difference. First operand 21129 states and 25984 transitions. Second operand 4 states. [2018-10-26 18:22:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:18,453 INFO L93 Difference]: Finished difference Result 41848 states and 51444 transitions. [2018-10-26 18:22:18,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:22:18,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2018-10-26 18:22:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:18,487 INFO L225 Difference]: With dead ends: 41848 [2018-10-26 18:22:18,487 INFO L226 Difference]: Without dead ends: 20721 [2018-10-26 18:22:18,517 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 [2018-10-26 18:22:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2018-10-26 18:22:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20721. [2018-10-26 18:22:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20721 states. [2018-10-26 18:22:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20721 states to 20721 states and 24096 transitions. [2018-10-26 18:22:18,789 INFO L78 Accepts]: Start accepts. Automaton has 20721 states and 24096 transitions. Word has length 247 [2018-10-26 18:22:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:18,789 INFO L481 AbstractCegarLoop]: Abstraction has 20721 states and 24096 transitions. [2018-10-26 18:22:18,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:22:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20721 states and 24096 transitions. [2018-10-26 18:22:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-26 18:22:18,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:18,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:18,809 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:18,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1252697395, now seen corresponding path program 1 times [2018-10-26 18:22:18,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:18,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:18,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:18,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:18,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:19,514 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-26 18:22:19,712 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-26 18:22:19,904 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-26 18:22:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 18:22:20,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 18:22:20,060 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 [2018-10-26 18:22:20,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:20,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 18:22:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 18:22:20,330 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 18:22:20,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-26 18:22:20,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 18:22:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 18:22:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 18:22:20,332 INFO L87 Difference]: Start difference. First operand 20721 states and 24096 transitions. Second operand 8 states. [2018-10-26 18:22:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:28,468 INFO L93 Difference]: Finished difference Result 115966 states and 132889 transitions. [2018-10-26 18:22:28,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 18:22:28,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 252 [2018-10-26 18:22:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:28,563 INFO L225 Difference]: With dead ends: 115966 [2018-10-26 18:22:28,564 INFO L226 Difference]: Without dead ends: 95247 [2018-10-26 18:22:28,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-26 18:22:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95247 states. [2018-10-26 18:22:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95247 to 57171. [2018-10-26 18:22:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57171 states. [2018-10-26 18:22:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57171 states to 57171 states and 64038 transitions. [2018-10-26 18:22:29,758 INFO L78 Accepts]: Start accepts. Automaton has 57171 states and 64038 transitions. Word has length 252 [2018-10-26 18:22:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:29,758 INFO L481 AbstractCegarLoop]: Abstraction has 57171 states and 64038 transitions. [2018-10-26 18:22:29,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 18:22:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 57171 states and 64038 transitions. [2018-10-26 18:22:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-26 18:22:29,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:29,780 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:22:29,780 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:29,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1332573799, now seen corresponding path program 1 times [2018-10-26 18:22:29,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:29,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:29,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-26 18:22:30,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:30,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:22:30,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:22:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:22:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:22:30,015 INFO L87 Difference]: Start difference. First operand 57171 states and 64038 transitions. Second operand 4 states. [2018-10-26 18:22:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:32,715 INFO L93 Difference]: Finished difference Result 214499 states and 240016 transitions. [2018-10-26 18:22:32,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:22:32,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-10-26 18:22:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:32,881 INFO L225 Difference]: With dead ends: 214499 [2018-10-26 18:22:32,882 INFO L226 Difference]: Without dead ends: 157330 [2018-10-26 18:22:32,936 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 [2018-10-26 18:22:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157330 states. [2018-10-26 18:22:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157330 to 157326. [2018-10-26 18:22:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157326 states. [2018-10-26 18:22:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157326 states to 157326 states and 175632 transitions. [2018-10-26 18:22:35,402 INFO L78 Accepts]: Start accepts. Automaton has 157326 states and 175632 transitions. Word has length 260 [2018-10-26 18:22:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:35,403 INFO L481 AbstractCegarLoop]: Abstraction has 157326 states and 175632 transitions. [2018-10-26 18:22:35,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:22:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 157326 states and 175632 transitions. [2018-10-26 18:22:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-26 18:22:35,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:35,422 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, 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, 1] [2018-10-26 18:22:35,422 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:35,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1041833096, now seen corresponding path program 1 times [2018-10-26 18:22:35,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:35,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:35,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:35,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:35,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-26 18:22:35,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:22:35,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 18:22:35,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:22:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:22:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:22:35,635 INFO L87 Difference]: Start difference. First operand 157326 states and 175632 transitions. Second operand 3 states. [2018-10-26 18:22:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:39,950 INFO L93 Difference]: Finished difference Result 398997 states and 445210 transitions. [2018-10-26 18:22:39,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:22:39,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 294 [2018-10-26 18:22:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:40,206 INFO L225 Difference]: With dead ends: 398997 [2018-10-26 18:22:40,206 INFO L226 Difference]: Without dead ends: 241673 [2018-10-26 18:22:40,283 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 [2018-10-26 18:22:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241673 states. [2018-10-26 18:22:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241673 to 241652. [2018-10-26 18:22:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241652 states. [2018-10-26 18:22:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241652 states to 241652 states and 269313 transitions. [2018-10-26 18:22:44,243 INFO L78 Accepts]: Start accepts. Automaton has 241652 states and 269313 transitions. Word has length 294 [2018-10-26 18:22:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:22:44,243 INFO L481 AbstractCegarLoop]: Abstraction has 241652 states and 269313 transitions. [2018-10-26 18:22:44,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 18:22:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 241652 states and 269313 transitions. [2018-10-26 18:22:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-26 18:22:44,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:22:44,265 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, 4, 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, 1, 1] [2018-10-26 18:22:44,266 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:22:44,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:22:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash -676252364, now seen corresponding path program 1 times [2018-10-26 18:22:44,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:22:44,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:22:44,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:44,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:44,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:22:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:44,590 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 18:22:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-26 18:22:44,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 18:22:44,722 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 [2018-10-26 18:22:44,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:22:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:22:44,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 18:22:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-10-26 18:22:44,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 18:22:44,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-26 18:22:44,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 18:22:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 18:22:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 18:22:44,977 INFO L87 Difference]: Start difference. First operand 241652 states and 269313 transitions. Second operand 6 states. [2018-10-26 18:22:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:22:53,259 INFO L93 Difference]: Finished difference Result 683568 states and 763505 transitions. [2018-10-26 18:22:53,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 18:22:53,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 302 [2018-10-26 18:22:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:22:53,859 INFO L225 Difference]: With dead ends: 683568 [2018-10-26 18:22:53,860 INFO L226 Difference]: Without dead ends: 441918 [2018-10-26 18:22:54,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-26 18:22:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441918 states. [2018-10-26 18:23:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441918 to 440171. [2018-10-26 18:23:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440171 states. [2018-10-26 18:23:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440171 states to 440171 states and 477419 transitions. [2018-10-26 18:23:08,007 INFO L78 Accepts]: Start accepts. Automaton has 440171 states and 477419 transitions. Word has length 302 [2018-10-26 18:23:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:23:08,007 INFO L481 AbstractCegarLoop]: Abstraction has 440171 states and 477419 transitions. [2018-10-26 18:23:08,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 18:23:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 440171 states and 477419 transitions. [2018-10-26 18:23:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-26 18:23:08,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:23:08,026 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:23:08,026 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:23:08,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:23:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1377458434, now seen corresponding path program 1 times [2018-10-26 18:23:08,027 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:23:08,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:23:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:23:08,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:23:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:23:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:23:08,552 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-26 18:23:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-26 18:23:09,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:23:09,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 18:23:09,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 18:23:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 18:23:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 18:23:09,774 INFO L87 Difference]: Start difference. First operand 440171 states and 477419 transitions. Second operand 5 states. [2018-10-26 18:23:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:23:16,744 INFO L93 Difference]: Finished difference Result 1166185 states and 1259615 transitions. [2018-10-26 18:23:16,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 18:23:16,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2018-10-26 18:23:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:23:17,826 INFO L225 Difference]: With dead ends: 1166185 [2018-10-26 18:23:17,827 INFO L226 Difference]: Without dead ends: 726016 [2018-10-26 18:23:18,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 18:23:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726016 states. [2018-10-26 18:23:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726016 to 675185. [2018-10-26 18:23:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675185 states. [2018-10-26 18:23:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675185 states to 675185 states and 728370 transitions. [2018-10-26 18:23:29,380 INFO L78 Accepts]: Start accepts. Automaton has 675185 states and 728370 transitions. Word has length 302 [2018-10-26 18:23:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:23:29,381 INFO L481 AbstractCegarLoop]: Abstraction has 675185 states and 728370 transitions. [2018-10-26 18:23:29,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 18:23:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 675185 states and 728370 transitions. [2018-10-26 18:23:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-26 18:23:29,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:23:29,404 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 18:23:29,404 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:23:29,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:23:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 817887903, now seen corresponding path program 1 times [2018-10-26 18:23:29,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:23:29,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:23:29,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:23:29,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:23:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:23:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:23:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-26 18:23:29,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:23:29,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 18:23:29,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 18:23:29,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 18:23:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:23:29,724 INFO L87 Difference]: Start difference. First operand 675185 states and 728370 transitions. Second operand 4 states. [2018-10-26 18:23:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:23:45,866 INFO L93 Difference]: Finished difference Result 1919610 states and 2063817 transitions. [2018-10-26 18:23:45,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 18:23:45,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2018-10-26 18:23:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:23:48,184 INFO L225 Difference]: With dead ends: 1919610 [2018-10-26 18:23:48,184 INFO L226 Difference]: Without dead ends: 1244427 [2018-10-26 18:23:48,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 18:23:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244427 states. [2018-10-26 18:24:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244427 to 1062592. [2018-10-26 18:24:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062592 states. [2018-10-26 18:24:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062592 states to 1062592 states and 1136101 transitions. [2018-10-26 18:24:25,551 INFO L78 Accepts]: Start accepts. Automaton has 1062592 states and 1136101 transitions. Word has length 313 [2018-10-26 18:24:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 18:24:25,551 INFO L481 AbstractCegarLoop]: Abstraction has 1062592 states and 1136101 transitions. [2018-10-26 18:24:25,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 18:24:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1062592 states and 1136101 transitions. [2018-10-26 18:24:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-26 18:24:25,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 18:24:25,571 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 18:24:25,571 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 18:24:25,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 18:24:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1817223472, now seen corresponding path program 1 times [2018-10-26 18:24:25,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 18:24:25,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 18:24:25,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:24:25,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 18:24:25,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 18:24:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 18:24:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-26 18:24:25,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 18:24:25,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 18:24:25,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 18:24:25,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 18:24:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 18:24:25,768 INFO L87 Difference]: Start difference. First operand 1062592 states and 1136101 transitions. Second operand 3 states. [2018-10-26 18:24:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 18:24:36,746 INFO L93 Difference]: Finished difference Result 2124939 states and 2271910 transitions. [2018-10-26 18:24:36,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 18:24:36,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2018-10-26 18:24:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 18:24:39,868 INFO L225 Difference]: With dead ends: 2124939 [2018-10-26 18:24:39,869 INFO L226 Difference]: Without dead ends: 1062349 [2018-10-26 18:24:40,189 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 [2018-10-26 18:24:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062349 states. Received shutdown request... [2018-10-26 18:24:55,852 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 18:24:55,856 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 18:24:55,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 06:24:55 BoogieIcfgContainer [2018-10-26 18:24:55,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 18:24:55,858 INFO L168 Benchmark]: Toolchain (without parser) took 196737.46 ms. Allocated memory was 1.5 GB in the beginning and 7.2 GB in the end (delta: 5.7 GB). Free memory was 1.4 GB in the beginning and 4.4 GB in the end (delta: -3.0 GB). Peak memory consumption was 6.3 GB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,859 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-26 18:24:55,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1187.07 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,860 INFO L168 Benchmark]: Boogie Procedure Inliner took 289.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,861 INFO L168 Benchmark]: Boogie Preprocessor took 136.35 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: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,862 INFO L168 Benchmark]: RCFGBuilder took 5661.92 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: 252.3 MB). Peak memory consumption was 252.3 MB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,863 INFO L168 Benchmark]: TraceAbstraction took 189456.10 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 4.4 GB in the end (delta: -2.4 GB). Peak memory consumption was 6.1 GB. Max. memory is 7.1 GB. [2018-10-26 18:24:55,868 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1187.07 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 289.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.35 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: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5661.92 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: 252.3 MB). Peak memory consumption was 252.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 189456.10 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 4.4 GB in the end (delta: -2.4 GB). Peak memory consumption was 6.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1500]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1500). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 303 locations, 1 error locations. TIMEOUT Result, 189.3s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 92.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3938 SDtfs, 15364 SDslu, 4680 SDs, 0 SdLazy, 19356 SolverSat, 4056 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 868 GetRequests, 811 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1062592occurred 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: 87.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 285337 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 4911 NumberOfCodeBlocks, 4911 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 4891 ConstructedInterpolants, 0 QuantifiedInterpolants, 2452438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1559 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 2636/2660 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown