/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:07:49,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:07:49,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:07:49,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:07:49,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:07:49,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:07:49,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:07:49,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:07:49,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:07:49,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:07:49,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:07:49,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:07:49,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:07:49,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:07:49,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:07:49,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:07:49,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:07:49,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:07:49,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:07:49,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:07:49,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:07:49,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:07:49,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:07:49,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:07:49,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:07:49,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:07:49,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:07:49,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:07:49,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:07:49,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:07:49,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:07:49,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:07:49,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:07:49,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:07:49,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:07:49,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:07:49,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:07:49,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:07:49,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:07:49,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:07:49,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:07:49,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 02:07:50,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:07:50,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:07:50,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:07:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:07:50,023 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:07:50,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:07:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:07:50,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:07:50,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:07:50,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:07:50,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:07:50,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:07:50,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:07:50,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:07:50,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:07:50,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:07:50,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:07:50,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:07:50,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:07:50,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:07:50,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:07:50,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:07:50,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:07:50,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:07:50,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:07:50,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:07:50,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:07:50,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:07:50,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:07:50,029 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:07:50,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:07:50,508 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:07:50,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:07:50,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:07:50,517 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:07:50,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-25 02:07:50,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1790a6414/992f5e58713d43b49ce2d465c593a414/FLAGbce5ea0ff [2020-09-25 02:07:51,184 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:07:51,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-25 02:07:51,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1790a6414/992f5e58713d43b49ce2d465c593a414/FLAGbce5ea0ff [2020-09-25 02:07:51,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1790a6414/992f5e58713d43b49ce2d465c593a414 [2020-09-25 02:07:51,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:07:51,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:07:51,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:51,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:07:51,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:07:51,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:51" (1/1) ... [2020-09-25 02:07:51,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ab8c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:51, skipping insertion in model container [2020-09-25 02:07:51,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:51" (1/1) ... [2020-09-25 02:07:51,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:07:51,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:07:51,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:51,994 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:07:52,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:52,122 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:07:52,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52 WrapperNode [2020-09-25 02:07:52,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:52,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:07:52,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:07:52,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:07:52,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... [2020-09-25 02:07:52,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:07:52,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:07:52,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:07:52,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:07:52,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:07:52,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:07:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:07:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 02:07:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 02:07:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 02:07:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-09-25 02:07:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-25 02:07:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2020-09-25 02:07:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 02:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 02:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 02:07:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 02:07:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 02:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 02:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 02:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 02:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 02:07:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 02:07:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 02:07:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 02:07:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 02:07:52,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 02:07:52,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 02:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 02:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 02:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 02:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 02:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 02:07:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 02:07:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 02:07:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 02:07:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 02:07:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 02:07:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 02:07:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 02:07:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 02:07:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 02:07:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 02:07:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 02:07:52,355 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 02:07:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 02:07:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 02:07:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 02:07:52,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:07:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 02:07:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 02:07:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 02:07:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 02:07:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 02:07:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 02:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 02:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 02:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 02:07:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 02:07:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 02:07:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 02:07:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-09-25 02:07:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 02:07:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 02:07:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:07:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-25 02:07:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2020-09-25 02:07:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 02:07:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 02:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:07:52,743 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 02:07:52,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:07:52,962 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 02:07:52,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:52 BoogieIcfgContainer [2020-09-25 02:07:52,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:07:52,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:07:52,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:07:52,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:07:52,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:07:51" (1/3) ... [2020-09-25 02:07:52,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55500f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:52, skipping insertion in model container [2020-09-25 02:07:52,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:52" (2/3) ... [2020-09-25 02:07:52,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55500f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:52, skipping insertion in model container [2020-09-25 02:07:52,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:52" (3/3) ... [2020-09-25 02:07:52,976 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2020-09-25 02:07:52,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:07:52,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:07:53,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:07:53,054 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:07:53,055 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:07:53,055 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:07:53,055 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:07:53,055 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:07:53,055 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:07:53,055 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:07:53,056 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:07:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-09-25 02:07:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:07:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:53,090 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] [2020-09-25 02:07:53,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1728925643, now seen corresponding path program 1 times [2020-09-25 02:07:53,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:53,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715425164] [2020-09-25 02:07:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:53,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:53,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:07:53,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:53,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-09-25 02:07:53,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 02:07:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:53,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:07:54,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:54,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:54,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:54,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:54,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:54,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:54,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:54,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:07:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:54,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:54,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:54,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:54,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:54,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:54,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:54,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715425164] [2020-09-25 02:07:54,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:54,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:07:54,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526234575] [2020-09-25 02:07:54,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:07:54,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:07:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:07:54,121 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 4 states. [2020-09-25 02:07:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:54,325 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-09-25 02:07:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:07:54,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-25 02:07:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:54,343 INFO L225 Difference]: With dead ends: 118 [2020-09-25 02:07:54,344 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 02:07:54,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:07:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 02:07:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-09-25 02:07:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 02:07:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-09-25 02:07:54,402 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 27 [2020-09-25 02:07:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:54,403 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-09-25 02:07:54,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:07:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-09-25 02:07:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:07:54,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:54,404 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] [2020-09-25 02:07:54,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:07:54,405 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1737237332, now seen corresponding path program 1 times [2020-09-25 02:07:54,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:54,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604683129] [2020-09-25 02:07:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:54,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:55,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:55,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:07:55,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-09-25 02:07:55,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:07:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 02:07:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 02:07:55,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:55,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:55,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:55,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:55,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:55,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:55,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:55,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:55,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:55,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:55,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:07:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:55,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:55,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:55,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:55,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 02:07:55,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:07:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:07:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:07:55,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:55,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604683129] [2020-09-25 02:07:55,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:55,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 02:07:55,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218852955] [2020-09-25 02:07:55,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:07:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:07:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:07:55,193 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 7 states. [2020-09-25 02:07:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:55,442 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-09-25 02:07:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:07:55,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 02:07:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:55,444 INFO L225 Difference]: With dead ends: 103 [2020-09-25 02:07:55,444 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 02:07:55,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:07:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 02:07:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-09-25 02:07:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 02:07:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-25 02:07:55,460 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 27 [2020-09-25 02:07:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:55,460 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-25 02:07:55,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:07:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-25 02:07:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 02:07:55,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:55,463 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, 1, 1, 1] [2020-09-25 02:07:55,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:07:55,464 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1632096868, now seen corresponding path program 1 times [2020-09-25 02:07:55,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:55,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541834111] [2020-09-25 02:07:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 02:07:56,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-09-25 02:07:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 02:07:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 02:07:56,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:56,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:56,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:56,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:56,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:56,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:56,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:07:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:56,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:56,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:56,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:07:56,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:56,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-25 02:07:56,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:56,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:56,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:07:56,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 02:07:56,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:56,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541834111] [2020-09-25 02:07:56,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:56,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:07:56,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875845062] [2020-09-25 02:07:56,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:07:56,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:07:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:07:56,665 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 9 states. [2020-09-25 02:07:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:56,930 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-09-25 02:07:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:07:56,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-09-25 02:07:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:56,932 INFO L225 Difference]: With dead ends: 105 [2020-09-25 02:07:56,932 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 02:07:56,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:07:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 02:07:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-09-25 02:07:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 02:07:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-09-25 02:07:56,942 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 39 [2020-09-25 02:07:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:56,942 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-09-25 02:07:56,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:07:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-09-25 02:07:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 02:07:56,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:56,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:56,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:07:56,945 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -337996148, now seen corresponding path program 2 times [2020-09-25 02:07:56,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:56,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571794948] [2020-09-25 02:07:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:58,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 02:07:58,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:07:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2027 [2020-09-25 02:07:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:07:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 02:07:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:07:58,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:59,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:59,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:59,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:59,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:59,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:59,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:59,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:59,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:07:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:59,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:07:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 02:07:59,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:07:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:59,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571794948] [2020-09-25 02:07:59,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:59,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:07:59,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457271403] [2020-09-25 02:07:59,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:07:59,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:07:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:07:59,332 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 6 states. [2020-09-25 02:07:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:59,537 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-25 02:07:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:07:59,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-09-25 02:07:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:59,539 INFO L225 Difference]: With dead ends: 119 [2020-09-25 02:07:59,539 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 02:07:59,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 02:07:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 02:07:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 02:07:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-09-25 02:07:59,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 51 [2020-09-25 02:07:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:59,548 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-09-25 02:07:59,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:07:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-09-25 02:07:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 02:07:59,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:59,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:59,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:07:59,550 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1091106069, now seen corresponding path program 1 times [2020-09-25 02:07:59,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:59,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717917476] [2020-09-25 02:07:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:00,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:00,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 02:08:00,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:08:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-09-25 02:08:00,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:08:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:08:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 02:08:00,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:00,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:08:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:00,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:00,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:00,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:08:00,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:08:00,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:00,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:00,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:08:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:00,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:01,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:01,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:08:01,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:08:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-09-25 02:08:01,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:08:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 02:08:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:08:01,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717917476] [2020-09-25 02:08:01,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:08:01,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:08:01,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871538872] [2020-09-25 02:08:01,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:08:01,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:08:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:08:01,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:08:01,262 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 10 states. [2020-09-25 02:08:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:08:01,700 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-09-25 02:08:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:08:01,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-09-25 02:08:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:08:01,702 INFO L225 Difference]: With dead ends: 91 [2020-09-25 02:08:01,702 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 02:08:01,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:08:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 02:08:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-09-25 02:08:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 02:08:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-09-25 02:08:01,721 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 52 [2020-09-25 02:08:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:08:01,721 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-09-25 02:08:01,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:08:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-09-25 02:08:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 02:08:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:08:01,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:08:01,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:08:01,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:08:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:08:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash -235655029, now seen corresponding path program 1 times [2020-09-25 02:08:01,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:08:01,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924239033] [2020-09-25 02:08:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:08:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:06,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:06,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 02:08:06,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 02:08:06,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 02:08:06,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 02:08:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 02:08:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 02:08:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:06,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:08:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:06,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:06,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:08:06,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:06,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:08:06,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:08:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:06,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:07,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:07,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:11,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:11,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:08:11,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:08:11,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4522 [2020-09-25 02:08:11,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:08:11,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:11,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 02:08:11,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 02:08:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:11,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:11,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:11,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 02:08:11,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:11,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 02:08:11,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:08:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 02:08:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:08:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:08:11,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924239033] [2020-09-25 02:08:11,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:08:11,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 02:08:11,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429836426] [2020-09-25 02:08:11,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 02:08:11,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:08:11,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 02:08:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:08:11,992 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 19 states. [2020-09-25 02:08:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:08:13,450 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-09-25 02:08:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 02:08:13,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2020-09-25 02:08:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:08:13,452 INFO L225 Difference]: With dead ends: 108 [2020-09-25 02:08:13,452 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 02:08:13,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 02:08:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 02:08:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-09-25 02:08:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 02:08:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-09-25 02:08:13,482 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 70 [2020-09-25 02:08:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:08:13,483 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-09-25 02:08:13,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 02:08:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-09-25 02:08:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 02:08:13,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:08:13,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:08:13,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:08:13,493 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:08:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:08:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -576246568, now seen corresponding path program 1 times [2020-09-25 02:08:13,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:08:13,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221661915] [2020-09-25 02:08:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:08:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:14,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:14,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 02:08:14,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:08:14,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-09-25 02:08:14,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:08:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:08:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 02:08:14,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:14,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:08:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:14,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:14,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:14,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:08:14,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:14,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:08:14,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:14,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:08:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:14,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:14,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:14,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:08:14,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:14,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-25 02:08:14,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:08:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:14,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 02:08:14,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:15,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 02:08:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:08:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:08:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:08:15,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221661915] [2020-09-25 02:08:15,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:08:15,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:08:15,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128975019] [2020-09-25 02:08:15,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:08:15,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:08:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:08:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:08:15,108 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 13 states. [2020-09-25 02:08:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:08:15,552 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 02:08:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:08:15,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-09-25 02:08:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:08:15,558 INFO L225 Difference]: With dead ends: 89 [2020-09-25 02:08:15,558 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 02:08:15,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-25 02:08:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 02:08:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-09-25 02:08:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 02:08:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-09-25 02:08:15,575 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 71 [2020-09-25 02:08:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:08:15,575 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-09-25 02:08:15,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:08:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-09-25 02:08:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 02:08:15,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:08:15,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:08:15,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:08:15,579 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:08:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:08:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 651894158, now seen corresponding path program 1 times [2020-09-25 02:08:15,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:08:15,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852272554] [2020-09-25 02:08:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:08:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:15,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:20,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 02:08:20,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:08:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 02:08:20,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:08:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-09-25 02:08:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 02:08:20,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:08:20,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:08:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:20,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:20,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:20,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:08:20,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:20,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:08:20,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:20,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:20,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:20,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:20,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:20,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:08:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:20,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:20,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:20,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:08:20,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:20,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 02:08:20,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:20,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:20,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:20,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 02:08:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:20,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:20,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 02:08:20,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 02:08:20,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:20,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 02:08:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:20,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:20,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:20,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 02:08:20,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:20,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 02:08:20,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:08:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:08:20,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 02:08:21,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852272554] [2020-09-25 02:08:21,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:08:21,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 02:08:21,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94339318] [2020-09-25 02:08:21,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:08:21,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:08:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:08:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:08:21,055 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 10 states. [2020-09-25 02:08:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:08:21,595 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-09-25 02:08:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:08:21,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-09-25 02:08:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:08:21,597 INFO L225 Difference]: With dead ends: 110 [2020-09-25 02:08:21,597 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 02:08:21,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-25 02:08:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 02:08:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2020-09-25 02:08:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 02:08:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-09-25 02:08:21,612 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 89 [2020-09-25 02:08:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:08:21,613 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-09-25 02:08:21,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:08:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-09-25 02:08:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 02:08:21,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:08:21,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:08:21,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:08:21,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:08:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:08:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1167974453, now seen corresponding path program 2 times [2020-09-25 02:08:21,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:08:21,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595394945] [2020-09-25 02:08:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:08:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:26,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:26,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:26,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 02:08:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 02:08:26,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:27,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:08:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:27,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:27,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:08:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:08:27,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:08:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:08:27,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:27,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 02:08:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:27,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:28,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:28,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:08:28,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:08:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1847 [2020-09-25 02:08:28,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:28,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 02:08:28,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:08:28,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 02:08:28,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 02:08:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:30,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:30,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 02:08:30,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:30,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-09-25 02:08:30,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:30,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:08:30,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 02:08:30,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 02:08:30,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:08:31,146 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-09-25 02:08:31,574 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-25 02:08:31,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 02:08:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:08:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:08:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:08:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 02:08:31,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:08:31,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 02:08:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 02:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 02:08:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:08:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:08:32,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595394945] [2020-09-25 02:08:32,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:08:32,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-25 02:08:32,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027106995] [2020-09-25 02:08:32,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-25 02:08:32,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:08:32,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-25 02:08:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2020-09-25 02:08:32,012 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 31 states. [2020-09-25 02:08:33,575 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-09-25 02:08:33,792 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-09-25 02:08:35,207 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-09-25 02:08:35,954 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82