/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:23:05,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:23:05,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:23:05,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:23:05,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:23:05,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:23:05,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:23:05,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:23:05,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:23:05,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:23:05,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:23:05,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:23:05,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:23:05,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:23:05,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:23:05,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:23:05,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:23:05,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:23:05,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:23:05,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:23:05,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:23:05,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:23:05,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:23:05,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:23:05,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 21:23:05,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 21:23:05,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 21:23:05,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 21:23:05,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 21:23:05,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 21:23:05,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 21:23:05,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 21:23:05,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 21:23:05,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 21:23:05,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 21:23:05,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 21:23:05,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 21:23:05,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 21:23:05,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:23:05,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:23:05,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:23:05,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:23:05,283 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:23:05,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:23:05,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:23:05,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:23:05,285 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:23:05,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:23:05,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:23:05,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:23:05,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:23:05,287 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:23:05,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:23:05,287 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:23:05,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:23:05,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:23:05,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:23:05,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:23:05,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:23:05,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:05,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:23:05,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:23:05,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:23:05,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:23:05,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:23:05,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:23:05,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:23:05,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:23:05,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:23:05,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:23:05,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:23:05,622 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:23:05,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-11-23 21:23:05,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22963bcf2/c1bcbdeaa0294269b925a49c15b7c5e9/FLAG529018d41 [2019-11-23 21:23:06,431 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:23:06,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-11-23 21:23:06,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22963bcf2/c1bcbdeaa0294269b925a49c15b7c5e9/FLAG529018d41 [2019-11-23 21:23:06,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22963bcf2/c1bcbdeaa0294269b925a49c15b7c5e9 [2019-11-23 21:23:06,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:23:06,531 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:23:06,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:06,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:23:06,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:23:06,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c72d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06, skipping insertion in model container [2019-11-23 21:23:06,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:23:06,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:23:07,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:07,882 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:23:08,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:08,404 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:23:08,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08 WrapperNode [2019-11-23 21:23:08,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:08,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:08,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:23:08,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:23:08,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:08,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:23:08,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:23:08,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:23:08,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:08,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:09,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... [2019-11-23 21:23:09,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:23:09,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:23:09,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:23:09,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:23:09,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:23:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:13,311 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:13,312 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:13,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:13 BoogieIcfgContainer [2019-11-23 21:23:13,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:13,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:13,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:13,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:13,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:06" (1/3) ... [2019-11-23 21:23:13,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2838bef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:13, skipping insertion in model container [2019-11-23 21:23:13,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:08" (2/3) ... [2019-11-23 21:23:13,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2838bef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:13, skipping insertion in model container [2019-11-23 21:23:13,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:13" (3/3) ... [2019-11-23 21:23:13,330 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label28.c [2019-11-23 21:23:13,340 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:13,349 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:13,363 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:13,413 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:13,414 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:13,414 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:13,414 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:13,414 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:13,416 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:13,416 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:13,417 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 21:23:13,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:13,467 INFO L410 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] [2019-11-23 21:23:13,468 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2019-11-23 21:23:13,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:13,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248348871] [2019-11-23 21:23:13,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:13,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248348871] [2019-11-23 21:23:13,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:13,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:13,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610085953] [2019-11-23 21:23:13,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:13,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:13,915 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:20,999 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:23:21,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:21,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-11-23 21:23:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:21,040 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:23:21,041 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:23:21,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:23:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:23:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3550 transitions. [2019-11-23 21:23:21,208 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3550 transitions. Word has length 64 [2019-11-23 21:23:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:21,209 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3550 transitions. [2019-11-23 21:23:21,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3550 transitions. [2019-11-23 21:23:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 21:23:21,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:21,216 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:21,217 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash -908058352, now seen corresponding path program 1 times [2019-11-23 21:23:21,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:21,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456653987] [2019-11-23 21:23:21,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:21,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456653987] [2019-11-23 21:23:21,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:21,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:21,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134526382] [2019-11-23 21:23:21,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:21,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:21,490 INFO L87 Difference]: Start difference. First operand 2074 states and 3550 transitions. Second operand 4 states. [2019-11-23 21:23:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:27,479 INFO L93 Difference]: Finished difference Result 8286 states and 14192 transitions. [2019-11-23 21:23:27,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:27,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-23 21:23:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:27,513 INFO L225 Difference]: With dead ends: 8286 [2019-11-23 21:23:27,514 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:27,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 9359 transitions. [2019-11-23 21:23:27,640 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 9359 transitions. Word has length 149 [2019-11-23 21:23:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:27,643 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 9359 transitions. [2019-11-23 21:23:27,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 9359 transitions. [2019-11-23 21:23:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-23 21:23:27,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:27,651 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:27,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1396271319, now seen corresponding path program 1 times [2019-11-23 21:23:27,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:27,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761108018] [2019-11-23 21:23:27,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:27,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761108018] [2019-11-23 21:23:27,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:27,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:27,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390221065] [2019-11-23 21:23:27,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:27,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:27,825 INFO L87 Difference]: Start difference. First operand 6214 states and 9359 transitions. Second operand 4 states. [2019-11-23 21:23:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:34,077 INFO L93 Difference]: Finished difference Result 23466 states and 35520 transitions. [2019-11-23 21:23:34,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:34,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-11-23 21:23:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:34,144 INFO L225 Difference]: With dead ends: 23466 [2019-11-23 21:23:34,145 INFO L226 Difference]: Without dead ends: 17254 [2019-11-23 21:23:34,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2019-11-23 21:23:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 17254. [2019-11-23 21:23:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17254 states. [2019-11-23 21:23:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 22975 transitions. [2019-11-23 21:23:34,492 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 22975 transitions. Word has length 150 [2019-11-23 21:23:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:34,493 INFO L462 AbstractCegarLoop]: Abstraction has 17254 states and 22975 transitions. [2019-11-23 21:23:34,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 22975 transitions. [2019-11-23 21:23:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 21:23:34,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:34,498 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:23:34,498 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1723706457, now seen corresponding path program 1 times [2019-11-23 21:23:34,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:34,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982130078] [2019-11-23 21:23:34,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-23 21:23:34,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982130078] [2019-11-23 21:23:34,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:34,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:34,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295535916] [2019-11-23 21:23:34,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:34,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:34,622 INFO L87 Difference]: Start difference. First operand 17254 states and 22975 transitions. Second operand 4 states. [2019-11-23 21:23:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:38,871 INFO L93 Difference]: Finished difference Result 46236 states and 61904 transitions. [2019-11-23 21:23:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:38,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2019-11-23 21:23:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:38,929 INFO L225 Difference]: With dead ends: 46236 [2019-11-23 21:23:38,929 INFO L226 Difference]: Without dead ends: 29674 [2019-11-23 21:23:38,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29674 states. [2019-11-23 21:23:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29674 to 23464. [2019-11-23 21:23:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23464 states. [2019-11-23 21:23:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 28545 transitions. [2019-11-23 21:23:39,494 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 28545 transitions. Word has length 215 [2019-11-23 21:23:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:39,496 INFO L462 AbstractCegarLoop]: Abstraction has 23464 states and 28545 transitions. [2019-11-23 21:23:39,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 28545 transitions. [2019-11-23 21:23:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-11-23 21:23:39,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:39,505 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:39,505 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1668988594, now seen corresponding path program 1 times [2019-11-23 21:23:39,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:39,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307911807] [2019-11-23 21:23:39,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 21:23:39,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307911807] [2019-11-23 21:23:39,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:39,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:39,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598743838] [2019-11-23 21:23:39,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:39,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:39,984 INFO L87 Difference]: Start difference. First operand 23464 states and 28545 transitions. Second operand 5 states. [2019-11-23 21:23:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:45,543 INFO L93 Difference]: Finished difference Result 55206 states and 66118 transitions. [2019-11-23 21:23:45,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:45,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2019-11-23 21:23:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:45,598 INFO L225 Difference]: With dead ends: 55206 [2019-11-23 21:23:45,599 INFO L226 Difference]: Without dead ends: 31744 [2019-11-23 21:23:45,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31744 states. [2019-11-23 21:23:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31744 to 31054. [2019-11-23 21:23:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31054 states. [2019-11-23 21:23:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31054 states to 31054 states and 36639 transitions. [2019-11-23 21:23:46,203 INFO L78 Accepts]: Start accepts. Automaton has 31054 states and 36639 transitions. Word has length 333 [2019-11-23 21:23:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:46,204 INFO L462 AbstractCegarLoop]: Abstraction has 31054 states and 36639 transitions. [2019-11-23 21:23:46,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31054 states and 36639 transitions. [2019-11-23 21:23:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2019-11-23 21:23:46,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:46,217 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:46,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:46,218 INFO L82 PathProgramCache]: Analyzing trace with hash 278066411, now seen corresponding path program 1 times [2019-11-23 21:23:46,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:46,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990607723] [2019-11-23 21:23:46,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 477 proven. 3 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 21:23:46,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990607723] [2019-11-23 21:23:46,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624984512] [2019-11-23 21:23:46,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:46,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:46,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-11-23 21:23:47,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:47,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:47,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357192059] [2019-11-23 21:23:47,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:47,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:47,830 INFO L87 Difference]: Start difference. First operand 31054 states and 36639 transitions. Second operand 3 states. [2019-11-23 21:23:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:51,503 INFO L93 Difference]: Finished difference Result 71766 states and 85866 transitions. [2019-11-23 21:23:51,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:51,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 515 [2019-11-23 21:23:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:51,597 INFO L225 Difference]: With dead ends: 71766 [2019-11-23 21:23:51,597 INFO L226 Difference]: Without dead ends: 41404 [2019-11-23 21:23:51,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 514 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2019-11-23 21:23:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2019-11-23 21:23:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41404 states. [2019-11-23 21:23:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 48335 transitions. [2019-11-23 21:23:52,476 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 48335 transitions. Word has length 515 [2019-11-23 21:23:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:52,478 INFO L462 AbstractCegarLoop]: Abstraction has 41404 states and 48335 transitions. [2019-11-23 21:23:52,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 48335 transitions. [2019-11-23 21:23:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2019-11-23 21:23:52,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:52,504 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:52,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:52,715 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:52,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1247678150, now seen corresponding path program 1 times [2019-11-23 21:23:52,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:52,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736018111] [2019-11-23 21:23:52,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 503 proven. 3 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-11-23 21:23:53,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736018111] [2019-11-23 21:23:53,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918381443] [2019-11-23 21:23:53,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:53,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:53,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-23 21:23:54,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:54,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:54,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668065419] [2019-11-23 21:23:54,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:54,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:54,041 INFO L87 Difference]: Start difference. First operand 41404 states and 48335 transitions. Second operand 3 states. [2019-11-23 21:23:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:57,506 INFO L93 Difference]: Finished difference Result 82116 states and 95972 transitions. [2019-11-23 21:23:57,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:57,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 541 [2019-11-23 21:23:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:57,567 INFO L225 Difference]: With dead ends: 82116 [2019-11-23 21:23:57,568 INFO L226 Difference]: Without dead ends: 41404 [2019-11-23 21:23:57,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 540 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2019-11-23 21:23:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2019-11-23 21:23:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41404 states. [2019-11-23 21:23:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 46963 transitions. [2019-11-23 21:23:58,125 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 46963 transitions. Word has length 541 [2019-11-23 21:23:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:58,126 INFO L462 AbstractCegarLoop]: Abstraction has 41404 states and 46963 transitions. [2019-11-23 21:23:58,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 46963 transitions. [2019-11-23 21:23:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2019-11-23 21:23:58,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:58,144 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:58,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:58,355 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2094777823, now seen corresponding path program 1 times [2019-11-23 21:23:58,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:58,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767823953] [2019-11-23 21:23:58,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 596 proven. 3 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 21:23:59,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767823953] [2019-11-23 21:23:59,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505458139] [2019-11-23 21:23:59,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:59,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:59,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 756 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-11-23 21:23:59,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:59,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:59,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147124137] [2019-11-23 21:23:59,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:59,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:59,855 INFO L87 Difference]: Start difference. First operand 41404 states and 46963 transitions. Second operand 3 states. [2019-11-23 21:24:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:03,411 INFO L93 Difference]: Finished difference Result 93846 states and 107910 transitions. [2019-11-23 21:24:03,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:03,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 584 [2019-11-23 21:24:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:03,463 INFO L225 Difference]: With dead ends: 93846 [2019-11-23 21:24:03,463 INFO L226 Difference]: Without dead ends: 49684 [2019-11-23 21:24:03,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2019-11-23 21:24:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2019-11-23 21:24:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48994 states. [2019-11-23 21:24:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 51811 transitions. [2019-11-23 21:24:04,928 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 51811 transitions. Word has length 584 [2019-11-23 21:24:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:04,929 INFO L462 AbstractCegarLoop]: Abstraction has 48994 states and 51811 transitions. [2019-11-23 21:24:04,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 51811 transitions. [2019-11-23 21:24:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2019-11-23 21:24:04,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:04,967 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:05,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:05,171 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:05,171 INFO L82 PathProgramCache]: Analyzing trace with hash -810403461, now seen corresponding path program 1 times [2019-11-23 21:24:05,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:05,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721907778] [2019-11-23 21:24:05,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 21:24:06,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721907778] [2019-11-23 21:24:06,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:06,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:06,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786255236] [2019-11-23 21:24:06,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:06,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:06,579 INFO L87 Difference]: Start difference. First operand 48994 states and 51811 transitions. Second operand 4 states. [2019-11-23 21:24:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:10,678 INFO L93 Difference]: Finished difference Result 118686 states and 126545 transitions. [2019-11-23 21:24:10,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:10,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1036 [2019-11-23 21:24:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:10,738 INFO L225 Difference]: With dead ends: 118686 [2019-11-23 21:24:10,739 INFO L226 Difference]: Without dead ends: 70384 [2019-11-23 21:24:10,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70384 states. [2019-11-23 21:24:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70384 to 57964. [2019-11-23 21:24:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57964 states. [2019-11-23 21:24:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57964 states to 57964 states and 61019 transitions. [2019-11-23 21:24:11,568 INFO L78 Accepts]: Start accepts. Automaton has 57964 states and 61019 transitions. Word has length 1036 [2019-11-23 21:24:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:11,569 INFO L462 AbstractCegarLoop]: Abstraction has 57964 states and 61019 transitions. [2019-11-23 21:24:11,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 57964 states and 61019 transitions. [2019-11-23 21:24:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2019-11-23 21:24:11,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:11,583 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:11,584 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2029201128, now seen corresponding path program 1 times [2019-11-23 21:24:11,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:11,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393555264] [2019-11-23 21:24:11,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2019-11-23 21:24:13,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393555264] [2019-11-23 21:24:13,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:13,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:13,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3379710] [2019-11-23 21:24:13,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:13,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:24:13,182 INFO L87 Difference]: Start difference. First operand 57964 states and 61019 transitions. Second operand 3 states. [2019-11-23 21:24:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:15,960 INFO L93 Difference]: Finished difference Result 129726 states and 137234 transitions. [2019-11-23 21:24:15,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:15,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1103 [2019-11-23 21:24:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:16,033 INFO L225 Difference]: With dead ends: 129726 [2019-11-23 21:24:16,034 INFO L226 Difference]: Without dead ends: 72454 [2019-11-23 21:24:16,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:24:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72454 states. [2019-11-23 21:24:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72454 to 67624. [2019-11-23 21:24:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67624 states. [2019-11-23 21:24:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67624 states to 67624 states and 71513 transitions. [2019-11-23 21:24:16,552 INFO L78 Accepts]: Start accepts. Automaton has 67624 states and 71513 transitions. Word has length 1103 [2019-11-23 21:24:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:16,553 INFO L462 AbstractCegarLoop]: Abstraction has 67624 states and 71513 transitions. [2019-11-23 21:24:16,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 67624 states and 71513 transitions. [2019-11-23 21:24:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1716 [2019-11-23 21:24:16,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:16,607 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:16,607 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 220306559, now seen corresponding path program 1 times [2019-11-23 21:24:16,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:16,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325347312] [2019-11-23 21:24:16,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1568 proven. 0 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2019-11-23 21:24:20,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325347312] [2019-11-23 21:24:20,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:20,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:20,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164016701] [2019-11-23 21:24:20,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:20,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:20,116 INFO L87 Difference]: Start difference. First operand 67624 states and 71513 transitions. Second operand 4 states.