/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:18:38,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:18:38,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:18:38,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:18:38,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:18:38,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:18:38,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:18:38,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:18:38,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:18:38,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:18:38,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:18:38,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:18:38,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:18:38,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:18:38,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:18:38,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:18:38,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:18:38,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:18:38,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:18:38,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:18:38,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:18:38,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:18:38,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:18:38,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:18:38,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:18:38,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:18:38,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:18:38,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:18:38,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:18:38,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:18:38,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:18:38,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:18:38,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:18:38,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:18:38,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:18:38,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:18:38,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:18:38,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:18:38,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:18:38,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:18:38,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:18:38,979 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 [2020-09-24 18:18:39,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:18:39,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:18:39,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:18:39,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:18:39,033 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:18:39,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:18:39,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:18:39,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:18:39,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:18:39,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:18:39,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:18:39,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:18:39,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:18:39,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:18:39,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:18:39,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:18:39,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:18:39,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:18:39,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:18:39,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:18:39,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:18:39,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:18:39,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:18:39,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:18:39,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:18:39,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:18:39,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:18:39,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:18:39,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:18:39,039 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:18:39,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:18:39,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:18:39,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:18:39,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:18:39,509 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:18:39,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-24 18:18:39,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ba3e86bb/843daca85b284de5957f54731bf825c5/FLAG1c2979adb [2020-09-24 18:18:40,215 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:18:40,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-24 18:18:40,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ba3e86bb/843daca85b284de5957f54731bf825c5/FLAG1c2979adb [2020-09-24 18:18:40,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ba3e86bb/843daca85b284de5957f54731bf825c5 [2020-09-24 18:18:40,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:18:40,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:18:40,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:18:40,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:18:40,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:18:40,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:18:40" (1/1) ... [2020-09-24 18:18:40,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c20e9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:40, skipping insertion in model container [2020-09-24 18:18:40,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:18:40" (1/1) ... [2020-09-24 18:18:40,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:18:40,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:18:41,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:18:41,133 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:18:41,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:18:41,245 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:18:41,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41 WrapperNode [2020-09-24 18:18:41,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:18:41,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:18:41,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:18:41,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:18:41,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (1/1) ... [2020-09-24 18:18:41,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:18:41,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:18:41,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:18:41,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:18:41,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (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 [2020-09-24 18:18:41,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:18:41,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:18:41,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:18:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 18:18:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 18:18:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 18:18:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 18:18:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 18:18:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 18:18:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 18:18:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 18:18:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 18:18:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 18:18:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 18:18:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 18:18:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 18:18:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 18:18:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 18:18:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 18:18:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 18:18:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 18:18:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 18:18:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 18:18:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 18:18:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 18:18:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 18:18:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 18:18:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 18:18:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 18:18:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 18:18:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 18:18:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 18:18:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 18:18:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 18:18:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 18:18:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 18:18:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 18:18:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 18:18:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 18:18:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 18:18:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 18:18:41,409 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 18:18:41,409 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 18:18:41,409 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 18:18:41,409 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 18:18:41,409 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:18:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 18:18:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 18:18:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 18:18:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:18:41,412 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 18:18:41,412 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 18:18:41,412 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 18:18:41,413 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 18:18:41,414 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 18:18:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 18:18:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 18:18:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 18:18:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 18:18:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:18:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:18:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:18:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:18:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:18:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:18:42,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:18:42,100 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-24 18:18:42,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:18:42 BoogieIcfgContainer [2020-09-24 18:18:42,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:18:42,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:18:42,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:18:42,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:18:42,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:18:40" (1/3) ... [2020-09-24 18:18:42,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd6932c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:18:42, skipping insertion in model container [2020-09-24 18:18:42,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:41" (2/3) ... [2020-09-24 18:18:42,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd6932c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:18:42, skipping insertion in model container [2020-09-24 18:18:42,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:18:42" (3/3) ... [2020-09-24 18:18:42,114 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-09-24 18:18:42,125 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:18:42,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-09-24 18:18:42,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-24 18:18:42,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:18:42,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:18:42,189 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:18:42,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:18:42,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:18:42,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:18:42,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:18:42,190 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:18:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-09-24 18:18:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 18:18:42,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:42,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:42,226 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -159181327, now seen corresponding path program 1 times [2020-09-24 18:18:42,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:42,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160285863] [2020-09-24 18:18:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:42,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:43,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:43,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 18:18:43,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:18:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-09-24 18:18:43,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:18:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:18:43,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:43,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:43,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:43,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:43,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:43,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:18:43,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:43,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:43,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160285863] [2020-09-24 18:18:43,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:43,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:18:43,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136685992] [2020-09-24 18:18:43,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:18:43,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:18:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:18:43,148 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2020-09-24 18:18:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:43,351 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-09-24 18:18:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:18:43,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 18:18:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:43,367 INFO L225 Difference]: With dead ends: 157 [2020-09-24 18:18:43,367 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 18:18:43,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:18:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 18:18:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-24 18:18:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 18:18:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-09-24 18:18:43,426 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 21 [2020-09-24 18:18:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:43,427 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-09-24 18:18:43,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:18:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-09-24 18:18:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 18:18:43,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:43,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:43,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:18:43,429 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1476818129, now seen corresponding path program 1 times [2020-09-24 18:18:43,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:43,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538071205] [2020-09-24 18:18:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:43,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:43,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 18:18:43,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:43,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-09-24 18:18:43,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:43,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:18:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:18:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:18:43,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:43,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:43,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:43,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:43,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:18:43,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:43,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:43,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538071205] [2020-09-24 18:18:43,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:43,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 18:18:43,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33145721] [2020-09-24 18:18:43,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:18:43,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:43,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:18:43,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:18:43,830 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 8 states. [2020-09-24 18:18:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:44,090 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-09-24 18:18:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:18:44,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-09-24 18:18:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:44,093 INFO L225 Difference]: With dead ends: 92 [2020-09-24 18:18:44,093 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 18:18:44,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:18:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 18:18:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-09-24 18:18:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 18:18:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-09-24 18:18:44,106 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 23 [2020-09-24 18:18:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:44,107 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-09-24 18:18:44,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:18:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-09-24 18:18:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 18:18:44,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:44,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:44,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:18:44,108 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1518762392, now seen corresponding path program 1 times [2020-09-24 18:18:44,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:44,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102788716] [2020-09-24 18:18:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:44,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:44,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:44,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 18:18:44,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-24 18:18:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:18:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:18:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:18:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:44,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:44,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:44,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:44,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:44,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:18:44,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:44,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102788716] [2020-09-24 18:18:44,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:44,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 18:18:44,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405292405] [2020-09-24 18:18:44,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:18:44,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:18:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:18:44,383 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 6 states. [2020-09-24 18:18:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:44,588 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-09-24 18:18:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:18:44,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-24 18:18:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:44,591 INFO L225 Difference]: With dead ends: 120 [2020-09-24 18:18:44,591 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 18:18:44,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:18:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 18:18:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 81. [2020-09-24 18:18:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 18:18:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-09-24 18:18:44,603 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 27 [2020-09-24 18:18:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:44,603 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-09-24 18:18:44,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:18:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-09-24 18:18:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:18:44,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:44,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:44,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:18:44,606 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:44,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2047332937, now seen corresponding path program 1 times [2020-09-24 18:18:44,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:44,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605363074] [2020-09-24 18:18:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:45,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:45,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 18:18:45,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:18:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-09-24 18:18:45,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:18:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-09-24 18:18:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 18:18:45,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:45,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:45,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:45,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:45,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:45,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:18:45,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:45,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:45,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:45,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605363074] [2020-09-24 18:18:45,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:45,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 18:18:45,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869060294] [2020-09-24 18:18:45,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:18:45,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:18:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:18:45,179 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2020-09-24 18:18:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:45,446 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-09-24 18:18:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:18:45,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-09-24 18:18:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:45,449 INFO L225 Difference]: With dead ends: 136 [2020-09-24 18:18:45,449 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 18:18:45,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:18:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 18:18:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-24 18:18:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 18:18:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-09-24 18:18:45,459 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 36 [2020-09-24 18:18:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:45,459 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-09-24 18:18:45,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:18:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-09-24 18:18:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 18:18:45,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:45,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:45,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:18:45,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:45,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1237644091, now seen corresponding path program 1 times [2020-09-24 18:18:45,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:45,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811112742] [2020-09-24 18:18:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:45,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:46,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:46,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 18:18:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-09-24 18:18:46,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 18:18:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:18:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 18:18:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:46,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:46,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:46,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:46,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:18:46,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:46,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:46,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:46,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811112742] [2020-09-24 18:18:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:18:46,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 18:18:46,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462339782] [2020-09-24 18:18:46,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 18:18:46,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 18:18:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:18:46,832 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 15 states. [2020-09-24 18:18:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:47,898 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-24 18:18:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 18:18:47,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-09-24 18:18:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:47,901 INFO L225 Difference]: With dead ends: 166 [2020-09-24 18:18:47,901 INFO L226 Difference]: Without dead ends: 163 [2020-09-24 18:18:47,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-09-24 18:18:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-24 18:18:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-09-24 18:18:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 18:18:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-09-24 18:18:47,912 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 40 [2020-09-24 18:18:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:47,913 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-09-24 18:18:47,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 18:18:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-09-24 18:18:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 18:18:47,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:47,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:47,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:18:47,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1411163060, now seen corresponding path program 1 times [2020-09-24 18:18:47,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:47,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73059354] [2020-09-24 18:18:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:48,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:49,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4935 [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:18:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 18:18:52,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:18:52,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:52,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:52,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:52,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:52,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:52,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:18:52,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:52,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:52,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:52,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:52,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:52,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73059354] [2020-09-24 18:18:52,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:18:52,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:18:52,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135125119] [2020-09-24 18:18:52,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:18:52,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:52,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:18:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:18:52,976 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 7 states. [2020-09-24 18:18:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:53,246 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-09-24 18:18:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 18:18:53,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-24 18:18:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:53,248 INFO L225 Difference]: With dead ends: 133 [2020-09-24 18:18:53,248 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 18:18:53,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:18:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 18:18:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-09-24 18:18:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 18:18:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-09-24 18:18:53,269 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 43 [2020-09-24 18:18:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:53,270 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-09-24 18:18:53,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:18:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-09-24 18:18:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 18:18:53,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:53,276 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:53,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:18:53,276 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1215747511, now seen corresponding path program 1 times [2020-09-24 18:18:53,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:53,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422848519] [2020-09-24 18:18:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:54,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:54,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:18:54,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:54,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-09-24 18:18:54,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:54,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 18:18:54,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:18:54,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 18:18:54,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:55,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:55,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:55,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:55,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:55,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:55,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:18:55,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:55,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:55,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:55,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:55,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422848519] [2020-09-24 18:18:55,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:18:55,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 18:18:55,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812031252] [2020-09-24 18:18:55,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 18:18:55,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 18:18:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:18:55,511 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 19 states. [2020-09-24 18:18:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:57,223 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2020-09-24 18:18:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 18:18:57,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-09-24 18:18:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:57,226 INFO L225 Difference]: With dead ends: 169 [2020-09-24 18:18:57,226 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 18:18:57,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 18:18:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 18:18:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2020-09-24 18:18:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 18:18:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-09-24 18:18:57,238 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 47 [2020-09-24 18:18:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:57,240 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-09-24 18:18:57,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 18:18:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-09-24 18:18:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 18:18:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:57,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:57,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:18:57,241 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash 632390076, now seen corresponding path program 1 times [2020-09-24 18:18:57,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:57,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845146232] [2020-09-24 18:18:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:57,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:58,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:02,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:02,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 18:19:02,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:19:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:19:02,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:19:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-09-24 18:19:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 18:19:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:02,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:02,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:02,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:02,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:02,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:02,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:02,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 18:19:02,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845146232] [2020-09-24 18:19:02,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:19:02,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 18:19:02,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197459033] [2020-09-24 18:19:02,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:19:02,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:19:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:19:02,348 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 6 states. [2020-09-24 18:19:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:02,556 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2020-09-24 18:19:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:19:02,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-24 18:19:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:02,558 INFO L225 Difference]: With dead ends: 131 [2020-09-24 18:19:02,558 INFO L226 Difference]: Without dead ends: 109 [2020-09-24 18:19:02,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:19:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-24 18:19:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-09-24 18:19:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 18:19:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-09-24 18:19:02,580 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 49 [2020-09-24 18:19:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:02,580 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-09-24 18:19:02,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:19:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-09-24 18:19:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 18:19:02,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:02,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:02,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:19:02,586 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash 231328440, now seen corresponding path program 2 times [2020-09-24 18:19:02,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:02,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552427755] [2020-09-24 18:19:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:03,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:03,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 18:19:03,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:03,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-09-24 18:19:03,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 18:19:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:19:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:19:03,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:04,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:04,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:04,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:04,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:19:04,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552427755] [2020-09-24 18:19:04,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:04,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 18:19:04,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556216449] [2020-09-24 18:19:04,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 18:19:04,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 18:19:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:19:04,599 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 19 states. [2020-09-24 18:19:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:06,017 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2020-09-24 18:19:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 18:19:06,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-09-24 18:19:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:06,020 INFO L225 Difference]: With dead ends: 186 [2020-09-24 18:19:06,020 INFO L226 Difference]: Without dead ends: 183 [2020-09-24 18:19:06,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 18:19:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-24 18:19:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 119. [2020-09-24 18:19:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-24 18:19:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2020-09-24 18:19:06,029 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 53 [2020-09-24 18:19:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:06,029 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2020-09-24 18:19:06,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 18:19:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2020-09-24 18:19:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 18:19:06,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:06,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:06,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:19:06,031 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2144912159, now seen corresponding path program 1 times [2020-09-24 18:19:06,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:06,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593949154] [2020-09-24 18:19:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:06,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:08,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:10,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:10,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 18:19:10,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:19:10,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4324 [2020-09-24 18:19:10,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 18:19:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-09-24 18:19:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 18:19:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:10,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:10,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:10,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:10,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:10,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:10,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:19:10,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593949154] [2020-09-24 18:19:10,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:10,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 18:19:10,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559557375] [2020-09-24 18:19:10,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 18:19:10,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:10,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 18:19:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:19:10,717 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand 15 states. [2020-09-24 18:19:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:11,683 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2020-09-24 18:19:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 18:19:11,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-09-24 18:19:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:11,684 INFO L225 Difference]: With dead ends: 188 [2020-09-24 18:19:11,685 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 18:19:11,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2020-09-24 18:19:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 18:19:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2020-09-24 18:19:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 18:19:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2020-09-24 18:19:11,693 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 56 [2020-09-24 18:19:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:11,693 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2020-09-24 18:19:11,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 18:19:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2020-09-24 18:19:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 18:19:11,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:11,694 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:11,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:19:11,695 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1025074422, now seen corresponding path program 1 times [2020-09-24 18:19:11,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:11,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649841385] [2020-09-24 18:19:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:13,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:13,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:19:13,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-09-24 18:19:13,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-24 18:19:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:19:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 18:19:13,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:19:14,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649841385] [2020-09-24 18:19:14,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:14,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 18:19:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629558757] [2020-09-24 18:19:14,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 18:19:14,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:14,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 18:19:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-24 18:19:14,638 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 25 states. [2020-09-24 18:19:15,168 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-09-24 18:19:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:17,455 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-09-24 18:19:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 18:19:17,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-09-24 18:19:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:17,456 INFO L225 Difference]: With dead ends: 163 [2020-09-24 18:19:17,456 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 18:19:17,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=640, Invalid=2116, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 18:19:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 18:19:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 103. [2020-09-24 18:19:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 18:19:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-09-24 18:19:17,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 60 [2020-09-24 18:19:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:17,464 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-09-24 18:19:17,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 18:19:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-09-24 18:19:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 18:19:17,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:17,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:17,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 18:19:17,466 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -412836324, now seen corresponding path program 2 times [2020-09-24 18:19:17,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:17,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347258115] [2020-09-24 18:19:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:18,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:21,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:21,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:19:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 18:19:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:22,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:22,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:22,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:19:22,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347258115] [2020-09-24 18:19:22,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:22,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 18:19:22,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582091372] [2020-09-24 18:19:22,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 18:19:22,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 18:19:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-09-24 18:19:22,826 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 17 states. [2020-09-24 18:19:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:23,906 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-09-24 18:19:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 18:19:23,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-09-24 18:19:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:23,908 INFO L225 Difference]: With dead ends: 147 [2020-09-24 18:19:23,908 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 18:19:23,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 18:19:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 18:19:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-24 18:19:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 18:19:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-09-24 18:19:23,915 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 63 [2020-09-24 18:19:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:23,916 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-09-24 18:19:23,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 18:19:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-09-24 18:19:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 18:19:23,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:23,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:23,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 18:19:23,917 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -80620955, now seen corresponding path program 1 times [2020-09-24 18:19:23,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:23,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836892681] [2020-09-24 18:19:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:23,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:27,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3154 [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 18:19:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:19:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 18:19:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:27,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:27,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:19:27,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836892681] [2020-09-24 18:19:27,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:27,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 18:19:27,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657535397] [2020-09-24 18:19:27,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 18:19:27,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 18:19:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:19:27,840 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 23 states. [2020-09-24 18:19:29,106 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58