/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:52:48,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:52:48,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:52:48,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:52:48,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:52:48,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:52:48,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:52:48,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:52:48,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:52:48,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:52:48,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:52:48,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:52:48,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:52:48,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:52:48,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:52:48,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:52:48,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:52:48,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:52:48,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:52:48,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:52:48,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:52:48,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:52:48,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:52:48,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:52:48,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:52:48,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:52:48,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:52:49,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:52:49,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:52:49,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:52:49,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:52:49,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:52:49,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:52:49,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:52:49,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:52:49,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:52:49,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:52:49,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:52:49,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:52:49,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:52:49,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:52:49,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 00:52:49,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:52:49,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:52:49,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:52:49,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:52:49,044 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:52:49,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:52:49,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:52:49,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:52:49,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:52:49,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:52:49,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:52:49,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:52:49,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:52:49,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:52:49,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:52:49,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:52:49,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:52:49,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:52:49,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:52:49,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:52:49,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:52:49,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:52:49,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:52:49,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:52:49,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:52:49,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:52:49,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:52:49,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:52:49,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:52:49,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 00:52:49,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:52:49,538 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:52:49,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:52:49,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:52:49,549 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:52:49,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2020-09-25 00:52:49,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a7fe49e/5bded38820f741bebd5d17f057fa49b9/FLAGb38aa7899 [2020-09-25 00:52:50,182 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:52:50,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2020-09-25 00:52:50,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a7fe49e/5bded38820f741bebd5d17f057fa49b9/FLAGb38aa7899 [2020-09-25 00:52:50,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a7fe49e/5bded38820f741bebd5d17f057fa49b9 [2020-09-25 00:52:50,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:52:50,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:52:50,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:52:50,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:52:50,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:52:50,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47211fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50, skipping insertion in model container [2020-09-25 00:52:50,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:52:50,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:52:50,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:52:50,816 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:52:50,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:52:50,846 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:52:50,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50 WrapperNode [2020-09-25 00:52:50,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:52:50,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:52:50,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:52:50,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:52:50,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... [2020-09-25 00:52:50,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:52:50,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:52:50,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:52:50,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:52:50,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-25 00:52:51,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:52:51,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:52:51,041 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-25 00:52:51,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:52:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:52:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:52:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-25 00:52:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:52:51,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:52:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:52:51,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:52:51,257 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 00:52:51,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:52:51 BoogieIcfgContainer [2020-09-25 00:52:51,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:52:51,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:52:51,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:52:51,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:52:51,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:52:50" (1/3) ... [2020-09-25 00:52:51,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:52:51, skipping insertion in model container [2020-09-25 00:52:51,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:52:50" (2/3) ... [2020-09-25 00:52:51,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:52:51, skipping insertion in model container [2020-09-25 00:52:51,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:52:51" (3/3) ... [2020-09-25 00:52:51,303 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2020-09-25 00:52:51,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:52:51,353 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:52:51,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:52:51,417 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:52:51,418 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:52:51,418 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:52:51,418 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:52:51,418 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:52:51,418 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:52:51,419 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:52:51,419 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:52:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-25 00:52:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:52:51,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:51,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:52:51,447 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-25 00:52:51,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:51,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267340557] [2020-09-25 00:52:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:51,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:51,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:52:51,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:52:51,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-09-25 00:52:51,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 00:52:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:52:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:52:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:51,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:51,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:52:51,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:52:51,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:51,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:52:51,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:52:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:51,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:52:51,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 00:52:51,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:52:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:51,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:52:51,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:52:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:52:51,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267340557] [2020-09-25 00:52:51,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:52:51,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:52:51,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952965134] [2020-09-25 00:52:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:52:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:52:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:52:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:52:52,001 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-25 00:52:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:52:52,103 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-25 00:52:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:52:52,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 00:52:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:52:52,123 INFO L225 Difference]: With dead ends: 44 [2020-09-25 00:52:52,123 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 00:52:52,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:52:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 00:52:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 00:52:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 00:52:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-25 00:52:52,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-25 00:52:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:52:52,186 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-25 00:52:52,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:52:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-25 00:52:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 00:52:52,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:52,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:52:52,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:52:52,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:52,190 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-25 00:52:52,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:52,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748977732] [2020-09-25 00:52:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:52,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:52,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 00:52:52,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:52:52,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-25 00:52:52,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:52,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:52,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:52:52,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:52,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:52,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:52:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:52:52,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:52:52,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:52,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:52:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:52,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:52,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:52:52,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:52,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 00:52:52,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:52,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:52:52,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:52,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:52,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:52:52,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748977732] [2020-09-25 00:52:52,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:52:52,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:52:52,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675121260] [2020-09-25 00:52:52,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:52:52,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:52:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:52:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:52:52,489 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-25 00:52:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:52:52,526 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-25 00:52:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:52:52,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 00:52:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:52:52,529 INFO L225 Difference]: With dead ends: 36 [2020-09-25 00:52:52,529 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:52:52,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:52:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:52:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 00:52:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 00:52:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-25 00:52:52,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-25 00:52:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:52:52,539 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-25 00:52:52,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:52:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-25 00:52:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 00:52:52,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:52,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:52:52,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:52:52,541 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-25 00:52:52,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:52,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968580266] [2020-09-25 00:52:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:52,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:54,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:54,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 00:52:54,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:52:54,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-09-25 00:52:54,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:52:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 00:52:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:52:54,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:54,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:52:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:54,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:54,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:52:54,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:52:54,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:54,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:54,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:52:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:54,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:54,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 00:52:54,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:52:54,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-09-25 00:52:54,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:54,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:52:54,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:52:54,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:54,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:52:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:54,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:54,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:52:54,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:54,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:52:54,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:54,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:54,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 00:52:54,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:54,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:55,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 00:52:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:55,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:55,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:52:55,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:55,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:52:55,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-25 00:52:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:55,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 00:52:55,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968580266] [2020-09-25 00:52:55,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:52:55,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:52:55,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921920992] [2020-09-25 00:52:55,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:52:55,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:52:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:52:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:52:55,027 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-09-25 00:52:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:52:55,155 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-09-25 00:52:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:52:55,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 00:52:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:52:55,157 INFO L225 Difference]: With dead ends: 52 [2020-09-25 00:52:55,158 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:52:55,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:52:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:52:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-25 00:52:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 00:52:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-25 00:52:55,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-09-25 00:52:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:52:55,171 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-25 00:52:55,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:52:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-25 00:52:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 00:52:55,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:55,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:52:55,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:52:55,175 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-09-25 00:52:55,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:55,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169456340] [2020-09-25 00:52:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:55,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:55,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:56,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 00:52:56,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:52:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-09-25 00:52:56,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:52:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 00:52:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:52:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:56,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:52:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:56,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:52:56,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:56,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:52:56,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:56,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:52:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:56,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:52:56,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 00:52:56,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:56,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:52:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 00:52:56,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:56,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:52:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:56,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:52:56,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:56,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:52:56,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:52:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:56,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:56,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:52:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:56,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:52:56,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:56,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 00:52:56,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:52:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 00:52:56,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169456340] [2020-09-25 00:52:56,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:52:56,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:52:56,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198852629] [2020-09-25 00:52:56,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:52:56,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:52:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:52:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:52:56,544 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-09-25 00:52:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:52:56,655 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-09-25 00:52:56,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:52:56,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 00:52:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:52:56,659 INFO L225 Difference]: With dead ends: 47 [2020-09-25 00:52:56,659 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 00:52:56,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:52:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 00:52:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-25 00:52:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 00:52:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-09-25 00:52:56,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 34 [2020-09-25 00:52:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:52:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-09-25 00:52:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:52:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-09-25 00:52:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 00:52:56,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:56,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:52:56,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:52:56,673 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-25 00:52:56,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:56,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732422018] [2020-09-25 00:52:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:58,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 00:52:58,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:52:58,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-09-25 00:52:58,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:58,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:52:58,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 00:52:58,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 00:52:58,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:52:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:58,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:52:58,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:58,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:52:58,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:52:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:52:58,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:58,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:52:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:58,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 00:52:58,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:52:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-09-25 00:52:58,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:52:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:52:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:52:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:52:58,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:52:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:58,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:58,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:52:58,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:52:58,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 00:52:58,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:52:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:52:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:58,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:52:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:58,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:52:58,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:52:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:52:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:52:58,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:52:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:52:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 00:52:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:52:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:52:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 00:52:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732422018] [2020-09-25 00:52:58,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:52:59,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:52:59,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96208177] [2020-09-25 00:52:59,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:52:59,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:52:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:52:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:52:59,001 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2020-09-25 00:52:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:52:59,157 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-09-25 00:52:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:52:59,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-25 00:52:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:52:59,163 INFO L225 Difference]: With dead ends: 76 [2020-09-25 00:52:59,164 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 00:52:59,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:52:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 00:52:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-25 00:52:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 00:52:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-09-25 00:52:59,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 35 [2020-09-25 00:52:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:52:59,190 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-09-25 00:52:59,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:52:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-09-25 00:52:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 00:52:59,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:52:59,195 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-09-25 00:52:59,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:52:59,195 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:52:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:52:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times [2020-09-25 00:52:59,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:52:59,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420617735] [2020-09-25 00:52:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:52:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:52:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:52:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:00,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:53:04,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:53:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:53:04,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:53:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 00:53:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:53:04,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:53:04,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:53:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:53:04,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:53:04,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:04,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:53:04,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:53:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:53:04,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-25 00:53:04,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:53:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:53:04,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:53:04,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:04,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 00:53:04,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:53:04,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 00:53:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:04,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:04,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:53:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:53:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:04,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:04,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 00:53:04,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:53:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:04,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 00:53:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:04,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:04,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:04,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:53:04,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:53:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:53:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-25 00:53:04,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420617735] [2020-09-25 00:53:04,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:53:04,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:53:04,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839493121] [2020-09-25 00:53:04,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:53:04,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:53:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:53:04,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:53:04,748 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2020-09-25 00:53:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:53:04,912 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-09-25 00:53:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 00:53:04,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-09-25 00:53:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:53:04,914 INFO L225 Difference]: With dead ends: 55 [2020-09-25 00:53:04,914 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 00:53:04,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:53:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 00:53:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 00:53:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 00:53:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-09-25 00:53:04,935 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 52 [2020-09-25 00:53:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:53:04,935 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-09-25 00:53:04,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:53:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-09-25 00:53:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 00:53:04,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:53:04,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:53:04,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:53:04,947 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:53:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:53:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 3 times [2020-09-25 00:53:04,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:53:04,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623016659] [2020-09-25 00:53:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:53:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:04,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:08,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:08,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:09,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:09,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 00:53:09,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:53:09,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 00:53:09,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:53:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 00:53:09,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:53:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:53:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:09,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:09,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:53:09,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:09,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:53:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:53:09,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:53:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:13,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:53:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:53:15,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 00:53:15,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:15,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:15,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:15,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:15,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:53:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-09-25 00:53:15,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:53:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:53:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:15,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:15,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:15,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:15,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 00:53:15,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:15,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:53:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:53:15,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:15,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:53:15,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:15,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:15,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 00:53:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:18,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:53:18,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:53:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2987 [2020-09-25 00:53:18,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 00:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 00:53:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:18,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:18,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:18,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:53:18,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-25 00:53:18,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:53:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:53:18,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:18,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:18,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:18,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:53:18,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 00:53:18,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:53:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:53:18,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:18,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:18,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:18,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:18,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:18,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 00:53:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:18,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:18,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:18,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:53:18,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:53:18,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 75 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-09-25 00:53:18,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623016659] [2020-09-25 00:53:18,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:53:18,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:53:18,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379127615] [2020-09-25 00:53:18,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:53:18,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:53:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:53:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:53:18,770 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 11 states. [2020-09-25 00:53:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:53:19,043 INFO L93 Difference]: Finished difference Result 101 states and 142 transitions. [2020-09-25 00:53:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 00:53:19,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-09-25 00:53:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:53:19,045 INFO L225 Difference]: With dead ends: 101 [2020-09-25 00:53:19,045 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 00:53:19,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:53:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 00:53:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-09-25 00:53:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 00:53:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-09-25 00:53:19,055 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 87 [2020-09-25 00:53:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:53:19,055 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-09-25 00:53:19,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:53:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-09-25 00:53:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 00:53:19,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:53:19,057 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:53:19,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:53:19,058 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:53:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:53:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1505694539, now seen corresponding path program 4 times [2020-09-25 00:53:19,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:53:19,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909531051] [2020-09-25 00:53:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:53:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:19,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:24,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 00:53:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:53:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:53:24,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:53:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 00:53:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:24,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:53:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:24,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:24,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:53:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:24,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:26,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 00:53:26,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:26,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:29,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:53:29,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3588 [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 00:53:29,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:29,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:29,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:29,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:53:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-25 00:53:29,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:53:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:29,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:53:29,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:29,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:29,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:29,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:53:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 00:53:29,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:53:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:53:29,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:29,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:29,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:29,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:29,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:29,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:53:29,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 00:53:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:30,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:30,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:30,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:30,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:53:30,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:53:30,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:30,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 00:53:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:30,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 00:53:30,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:53:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 00:53:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:53:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 58 proven. 38 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-25 00:53:30,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909531051] [2020-09-25 00:53:30,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:53:30,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:53:30,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108731404] [2020-09-25 00:53:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:53:30,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:53:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:53:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:53:30,076 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2020-09-25 00:53:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:53:30,278 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2020-09-25 00:53:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 00:53:30,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-09-25 00:53:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:53:30,281 INFO L225 Difference]: With dead ends: 101 [2020-09-25 00:53:30,281 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 00:53:30,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:53:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 00:53:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 00:53:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 00:53:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-09-25 00:53:30,289 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 70 [2020-09-25 00:53:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:53:30,290 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-09-25 00:53:30,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:53:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-09-25 00:53:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 00:53:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:53:30,291 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:53:30,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:53:30,291 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:53:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:53:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash 866676589, now seen corresponding path program 5 times [2020-09-25 00:53:30,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:53:30,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133212418] [2020-09-25 00:53:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:53:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:32,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:35,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 00:53:35,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:53:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 00:53:35,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:35,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:53:35,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:53:35,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 00:53:35,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:53:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:35,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:53:35,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:53:35,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:35,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:53:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:35,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 00:53:40,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:53:40,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:53:40,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:53:40,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 00:53:40,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 00:53:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:53:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 00:53:40,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 00:53:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:40,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:53:40,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:40,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:40,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:53:40,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:40,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 00:53:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:40,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:40,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 00:53:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 00:53:40,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:53:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-09-25 00:53:40,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:53:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:53:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 00:53:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:53:40,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 00:53:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:53:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:53:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:53:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:40,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:53:40,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:53:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:53:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:53:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 31 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-09-25 00:53:40,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133212418] [2020-09-25 00:53:40,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:53:40,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:53:40,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329841436] [2020-09-25 00:53:40,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:53:40,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:53:40,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:53:40,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:53:40,685 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-09-25 00:53:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:53:40,826 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-09-25 00:53:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 00:53:40,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-09-25 00:53:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:53:40,828 INFO L225 Difference]: With dead ends: 68 [2020-09-25 00:53:40,828 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 00:53:40,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:53:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 00:53:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-09-25 00:53:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 00:53:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-09-25 00:53:40,845 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 87 [2020-09-25 00:53:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:53:40,845 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-09-25 00:53:40,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:53:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-09-25 00:53:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-25 00:53:40,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:53:40,846 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:53:40,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:53:40,850 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:53:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:53:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1885389560, now seen corresponding path program 6 times [2020-09-25 00:53:40,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:53:40,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106314599] [2020-09-25 00:53:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:53:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:40,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:45,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:45,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-25 00:53:45,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:53:45,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:53:45,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:53:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:53:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 00:53:45,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:53:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:45,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:45,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:53:45,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:53:45,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:53:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:53:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:53:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:53:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:53:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:53:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:53:45,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 00:53:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:53:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:46,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:53:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking...