/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/Problem12_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:07:31,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:07:31,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:07:31,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:07:31,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:07:31,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:07:31,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:07:31,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:07:31,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:07:31,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:07:31,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:07:31,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:07:31,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:07:31,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:07:31,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:07:31,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:07:31,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:07:31,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:07:31,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:07:31,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:07:31,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:07:31,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:07:31,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:07:31,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:07:31,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 21:07:31,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 21:07:31,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 21:07:31,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 21:07:31,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 21:07:31,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 21:07:31,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 21:07:31,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 21:07:31,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 21:07:31,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 21:07:31,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 21:07:31,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 21:07:31,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 21:07:31,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 21:07:31,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:07:31,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:07:31,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:07:31,299 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 21:07:31,333 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:07:31,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:07:31,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:07:31,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:07:31,335 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:07:31,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:07:31,335 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:07:31,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:07:31,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:07:31,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:07:31,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:07:31,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:07:31,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:07:31,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:07:31,337 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:07:31,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:07:31,337 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:07:31,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:07:31,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:07:31,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:07:31,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:07:31,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:07:31,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:07:31,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:07:31,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:07:31,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:07:31,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:07:31,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:07:31,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:07:31,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:07:31,604 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:07:31,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:07:31,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:07:31,623 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:07:31,624 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:07:31,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-11-23 21:07:31,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dedfd4a08/b596332dc52e400ebb9d0e865a327048/FLAG97836a4bb [2019-11-23 21:07:32,503 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:07:32,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-11-23 21:07:32,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dedfd4a08/b596332dc52e400ebb9d0e865a327048/FLAG97836a4bb [2019-11-23 21:07:33,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dedfd4a08/b596332dc52e400ebb9d0e865a327048 [2019-11-23 21:07:33,010 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:07:33,012 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:07:33,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:33,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:07:33,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:07:33,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:33" (1/1) ... [2019-11-23 21:07:33,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1446a6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:33, skipping insertion in model container [2019-11-23 21:07:33,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:33" (1/1) ... [2019-11-23 21:07:33,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:07:33,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:07:34,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:34,720 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:07:35,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:35,397 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:07:35,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35 WrapperNode [2019-11-23 21:07:35,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:35,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:35,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:07:35,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:07:35,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:35,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:07:35,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:07:35,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:07:35,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:35,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:36,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (1/1) ... [2019-11-23 21:07:36,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:07:36,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:07:36,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:07:36,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:07:36,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (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 21:07:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:07:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:07:41,858 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:07:41,858 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:07:41,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:41 BoogieIcfgContainer [2019-11-23 21:07:41,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:07:41,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:07:41,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:07:41,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:07:41,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:07:33" (1/3) ... [2019-11-23 21:07:41,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57223473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:41, skipping insertion in model container [2019-11-23 21:07:41,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:35" (2/3) ... [2019-11-23 21:07:41,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57223473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:41, skipping insertion in model container [2019-11-23 21:07:41,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:41" (3/3) ... [2019-11-23 21:07:41,868 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label12.c [2019-11-23 21:07:41,878 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:07:41,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:07:41,899 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:07:41,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:07:41,940 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:07:41,940 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:07:41,940 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:07:41,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:07:41,941 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:07:41,941 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:07:41,942 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:07:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:07:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 21:07:41,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:41,996 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] [2019-11-23 21:07:41,996 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2019-11-23 21:07:42,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:42,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884603396] [2019-11-23 21:07:42,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:42,405 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 21:07:42,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884603396] [2019-11-23 21:07:42,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:42,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:42,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227168666] [2019-11-23 21:07:42,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:42,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:42,432 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2019-11-23 21:07:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:51,051 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2019-11-23 21:07:51,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:51,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2019-11-23 21:07:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:51,097 INFO L225 Difference]: With dead ends: 3142 [2019-11-23 21:07:51,097 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:07:51,111 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 21:07:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:07:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:07:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:07:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3685 transitions. [2019-11-23 21:07:51,428 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3685 transitions. Word has length 58 [2019-11-23 21:07:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:51,429 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 3685 transitions. [2019-11-23 21:07:51,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3685 transitions. [2019-11-23 21:07:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 21:07:51,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:51,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:51,443 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 874422409, now seen corresponding path program 1 times [2019-11-23 21:07:51,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:51,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370417839] [2019-11-23 21:07:51,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 51 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:51,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370417839] [2019-11-23 21:07:51,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588936516] [2019-11-23 21:07:51,849 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 21:07:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:51,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:07:51,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:52,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:07:52,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:07:52,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038981833] [2019-11-23 21:07:52,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:07:52,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:07:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:07:52,070 INFO L87 Difference]: Start difference. First operand 2257 states and 3685 transitions. Second operand 3 states. [2019-11-23 21:07:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:57,575 INFO L93 Difference]: Finished difference Result 6765 states and 11050 transitions. [2019-11-23 21:07:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:07:57,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-11-23 21:07:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:57,598 INFO L225 Difference]: With dead ends: 6765 [2019-11-23 21:07:57,598 INFO L226 Difference]: Without dead ends: 4510 [2019-11-23 21:07:57,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:07:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2019-11-23 21:07:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2019-11-23 21:07:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-11-23 21:07:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6466 transitions. [2019-11-23 21:07:57,683 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6466 transitions. Word has length 129 [2019-11-23 21:07:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:57,684 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 6466 transitions. [2019-11-23 21:07:57,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:07:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6466 transitions. [2019-11-23 21:07:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 21:07:57,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:57,687 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, 1, 1, 1, 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 21:07:57,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:57,892 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -195294022, now seen corresponding path program 1 times [2019-11-23 21:07:57,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:57,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026034789] [2019-11-23 21:07:57,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:58,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026034789] [2019-11-23 21:07:58,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:58,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:07:58,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325479020] [2019-11-23 21:07:58,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:07:58,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:07:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:07:58,182 INFO L87 Difference]: Start difference. First operand 4510 states and 6466 transitions. Second operand 6 states. [2019-11-23 21:08:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:08,290 INFO L93 Difference]: Finished difference Result 14275 states and 20300 transitions. [2019-11-23 21:08:08,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:08,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-11-23 21:08:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:08,336 INFO L225 Difference]: With dead ends: 14275 [2019-11-23 21:08:08,336 INFO L226 Difference]: Without dead ends: 9767 [2019-11-23 21:08:08,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:08:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2019-11-23 21:08:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2019-11-23 21:08:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9767 states. [2019-11-23 21:08:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13488 transitions. [2019-11-23 21:08:08,534 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13488 transitions. Word has length 135 [2019-11-23 21:08:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:08,534 INFO L462 AbstractCegarLoop]: Abstraction has 9767 states and 13488 transitions. [2019-11-23 21:08:08,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:08:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13488 transitions. [2019-11-23 21:08:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-23 21:08:08,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:08,537 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:08,538 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1995333375, now seen corresponding path program 1 times [2019-11-23 21:08:08,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:08,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207084932] [2019-11-23 21:08:08,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 153 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 21:08:08,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207084932] [2019-11-23 21:08:08,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885906431] [2019-11-23 21:08:08,894 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 21:08:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:09,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:08:09,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 21:08:09,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:09,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 21:08:09,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67906031] [2019-11-23 21:08:09,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:09,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:08:09,170 INFO L87 Difference]: Start difference. First operand 9767 states and 13488 transitions. Second operand 3 states. [2019-11-23 21:08:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:11,912 INFO L93 Difference]: Finished difference Result 18818 states and 26254 transitions. [2019-11-23 21:08:11,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:11,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2019-11-23 21:08:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:11,951 INFO L225 Difference]: With dead ends: 18818 [2019-11-23 21:08:11,951 INFO L226 Difference]: Without dead ends: 9767 [2019-11-23 21:08:11,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:08:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2019-11-23 21:08:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2019-11-23 21:08:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9767 states. [2019-11-23 21:08:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12794 transitions. [2019-11-23 21:08:12,122 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12794 transitions. Word has length 198 [2019-11-23 21:08:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:12,123 INFO L462 AbstractCegarLoop]: Abstraction has 9767 states and 12794 transitions. [2019-11-23 21:08:12,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12794 transitions. [2019-11-23 21:08:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-23 21:08:12,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:12,128 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, 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] [2019-11-23 21:08:12,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:12,333 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash 23304004, now seen corresponding path program 1 times [2019-11-23 21:08:12,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:12,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739352728] [2019-11-23 21:08:12,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 111 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 21:08:12,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739352728] [2019-11-23 21:08:12,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235572634] [2019-11-23 21:08:12,556 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 21:08:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:12,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:08:12,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:08:12,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:12,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:08:12,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645025207] [2019-11-23 21:08:12,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:12,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:12,776 INFO L87 Difference]: Start difference. First operand 9767 states and 12794 transitions. Second operand 3 states. [2019-11-23 21:08:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:16,690 INFO L93 Difference]: Finished difference Result 27793 states and 36865 transitions. [2019-11-23 21:08:16,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:16,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-11-23 21:08:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:16,723 INFO L225 Difference]: With dead ends: 27793 [2019-11-23 21:08:16,724 INFO L226 Difference]: Without dead ends: 18779 [2019-11-23 21:08:16,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 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 21:08:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18779 states. [2019-11-23 21:08:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18779 to 16526. [2019-11-23 21:08:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16526 states. [2019-11-23 21:08:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 20810 transitions. [2019-11-23 21:08:16,999 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 20810 transitions. Word has length 280 [2019-11-23 21:08:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:17,000 INFO L462 AbstractCegarLoop]: Abstraction has 16526 states and 20810 transitions. [2019-11-23 21:08:17,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 20810 transitions. [2019-11-23 21:08:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-11-23 21:08:17,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:17,006 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:08:17,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:17,210 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 132729683, now seen corresponding path program 1 times [2019-11-23 21:08:17,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:17,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781338140] [2019-11-23 21:08:17,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 269 proven. 6 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-23 21:08:17,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781338140] [2019-11-23 21:08:17,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446438769] [2019-11-23 21:08:17,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:17,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:08:17,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 21:08:17,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:17,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:08:17,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935672523] [2019-11-23 21:08:17,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:17,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:08:17,952 INFO L87 Difference]: Start difference. First operand 16526 states and 20810 transitions. Second operand 3 states. [2019-11-23 21:08:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:21,829 INFO L93 Difference]: Finished difference Result 36805 states and 46394 transitions. [2019-11-23 21:08:21,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:21,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2019-11-23 21:08:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:21,878 INFO L225 Difference]: With dead ends: 36805 [2019-11-23 21:08:21,878 INFO L226 Difference]: Without dead ends: 21032 [2019-11-23 21:08:21,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 346 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:08:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2019-11-23 21:08:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21032. [2019-11-23 21:08:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21032 states. [2019-11-23 21:08:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 24589 transitions. [2019-11-23 21:08:22,165 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 24589 transitions. Word has length 347 [2019-11-23 21:08:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:22,167 INFO L462 AbstractCegarLoop]: Abstraction has 21032 states and 24589 transitions. [2019-11-23 21:08:22,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 24589 transitions. [2019-11-23 21:08:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2019-11-23 21:08:22,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:22,176 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, 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, 1, 1, 1, 1, 1, 1, 1, 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 21:08:22,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:22,380 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1727832046, now seen corresponding path program 1 times [2019-11-23 21:08:22,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:22,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15955047] [2019-11-23 21:08:22,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 21:08:22,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15955047] [2019-11-23 21:08:22,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:22,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:08:22,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249849662] [2019-11-23 21:08:22,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:22,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:22,730 INFO L87 Difference]: Start difference. First operand 21032 states and 24589 transitions. Second operand 4 states. [2019-11-23 21:08:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:28,347 INFO L93 Difference]: Finished difference Result 51825 states and 60624 transitions. [2019-11-23 21:08:28,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:28,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 385 [2019-11-23 21:08:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:28,380 INFO L225 Difference]: With dead ends: 51825 [2019-11-23 21:08:28,380 INFO L226 Difference]: Without dead ends: 31546 [2019-11-23 21:08:28,398 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 21:08:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31546 states. [2019-11-23 21:08:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31546 to 30044. [2019-11-23 21:08:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30044 states. [2019-11-23 21:08:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 34799 transitions. [2019-11-23 21:08:28,797 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 34799 transitions. Word has length 385 [2019-11-23 21:08:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:28,798 INFO L462 AbstractCegarLoop]: Abstraction has 30044 states and 34799 transitions. [2019-11-23 21:08:28,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 34799 transitions. [2019-11-23 21:08:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-11-23 21:08:28,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:28,807 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:28,808 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:28,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1827245560, now seen corresponding path program 1 times [2019-11-23 21:08:28,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:28,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116190328] [2019-11-23 21:08:28,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 248 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 21:08:29,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116190328] [2019-11-23 21:08:29,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488706107] [2019-11-23 21:08:29,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:29,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 21:08:29,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:29,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:29,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:08:29,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:29,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:29,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:08:29,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:29,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 248 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 21:08:30,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:08:30,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 21:08:30,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522700979] [2019-11-23 21:08:30,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 21:08:30,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 21:08:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:08:30,377 INFO L87 Difference]: Start difference. First operand 30044 states and 34799 transitions. Second operand 9 states.