/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:21:10,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:21:10,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:21:10,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:21:10,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:21:10,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:21:10,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:21:10,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:21:10,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:21:10,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:21:10,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:21:10,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:21:10,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:21:10,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:21:10,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:21:10,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:21:10,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:21:10,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:21:10,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:21:10,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:21:10,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:21:10,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:21:10,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:21:10,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:21:10,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:21:10,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:21:10,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:21:10,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:21:10,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:21:10,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:21:10,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:21:10,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:21:10,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:21:10,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:21:10,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:21:10,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:21:10,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:21:10,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:21:10,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:21:10,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:21:10,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:21:10,946 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 [2020-10-13 10:21:10,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:21:10,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:21:10,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:21:10,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:21:10,969 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:21:10,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:21:10,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:21:10,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:21:10,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:21:10,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:21:10,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:21:10,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:21:10,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:21:10,971 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:21:10,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:21:10,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:21:10,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:21:10,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:21:10,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:21:10,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:21:10,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:21:10,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:21:10,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:21:10,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:21:10,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:21:10,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:21:10,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:21:10,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:21:10,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:21:10,974 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-13 10:21:11,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:21:11,305 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:21:11,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:21:11,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:21:11,312 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:21:11,313 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-13 10:21:11,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/938cb417a/d969f1a754f64e38a62d31dec07b5c42/FLAG4ff6cf98d [2020-10-13 10:21:11,943 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:21:11,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-13 10:21:11,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/938cb417a/d969f1a754f64e38a62d31dec07b5c42/FLAG4ff6cf98d [2020-10-13 10:21:12,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/938cb417a/d969f1a754f64e38a62d31dec07b5c42 [2020-10-13 10:21:12,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:21:12,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:21:12,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:12,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:21:12,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:21:12,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358c3c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12, skipping insertion in model container [2020-10-13 10:21:12,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:21:12,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:21:12,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:12,810 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:21:12,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:12,909 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:21:12,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12 WrapperNode [2020-10-13 10:21:12,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:12,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:21:12,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:21:12,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:21:12,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:21:12,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:21:12,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:21:12,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:21:12,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (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 [2020-10-13 10:21:13,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:21:13,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:21:13,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:21:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:21:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:21:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:21:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:21:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:21:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:21:13,052 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:21:13,053 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:21:13,054 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:21:13,055 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:21:13,056 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:21:13,057 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:21:13,058 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:21:13,059 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:21:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:21:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:21:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:21:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:21:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:21:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:21:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:21:13,609 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:21:13,609 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 10:21:13,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:13 BoogieIcfgContainer [2020-10-13 10:21:13,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:21:13,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:21:13,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:21:13,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:21:13,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:21:12" (1/3) ... [2020-10-13 10:21:13,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ac1c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:13, skipping insertion in model container [2020-10-13 10:21:13,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12" (2/3) ... [2020-10-13 10:21:13,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ac1c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:13, skipping insertion in model container [2020-10-13 10:21:13,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:13" (3/3) ... [2020-10-13 10:21:13,622 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-10-13 10:21:13,633 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:21:13,641 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-13 10:21:13,655 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-13 10:21:13,678 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:21:13,678 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:21:13,678 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:21:13,678 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:21:13,679 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:21:13,679 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:21:13,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:21:13,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:21:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 10:21:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:21:13,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:13,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:13,708 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-10-13 10:21:13,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:13,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825020508] [2020-10-13 10:21:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:21:14,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 10:21:14,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:21:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:21:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:21:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:14,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825020508] [2020-10-13 10:21:14,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:14,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:21:14,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213904371] [2020-10-13 10:21:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:21:14,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:21:14,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:14,265 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 10:21:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:14,403 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-10-13 10:21:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:21:14,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:21:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:14,414 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:21:14,415 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:21:14,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:21:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:21:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:21:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 10:21:14,459 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-10-13 10:21:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:14,460 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 10:21:14,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:21:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 10:21:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:21:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:14,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:14,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:21:14,462 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 622671912, now seen corresponding path program 1 times [2020-10-13 10:21:14,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:14,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413979547] [2020-10-13 10:21:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:21:14,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 10:21:14,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:21:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:14,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:14,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413979547] [2020-10-13 10:21:14,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:14,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:14,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993125361] [2020-10-13 10:21:14,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:14,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:14,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:14,662 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 10:21:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:14,788 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-13 10:21:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:14,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-13 10:21:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:14,790 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:21:14,790 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:21:14,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:21:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-13 10:21:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:21:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 10:21:14,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-10-13 10:21:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:14,798 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 10:21:14,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 10:21:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:21:14,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:14,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:14,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:21:14,800 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:14,800 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-10-13 10:21:14,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:14,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630677198] [2020-10-13 10:21:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:21:14,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 10:21:14,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:21:14,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:14,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:14,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:14,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630677198] [2020-10-13 10:21:14,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:14,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:14,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586277959] [2020-10-13 10:21:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:14,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:14,943 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-13 10:21:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:15,148 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-13 10:21:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:15,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 10:21:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:15,150 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:21:15,150 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:21:15,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:21:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-10-13 10:21:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:21:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 10:21:15,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-10-13 10:21:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:15,159 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 10:21:15,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 10:21:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:21:15,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:15,160 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:15,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:21:15,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-10-13 10:21:15,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:15,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665624179] [2020-10-13 10:21:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:21:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-13 10:21:15,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:21:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:15,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:15,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:15,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:15,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665624179] [2020-10-13 10:21:15,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:15,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:21:15,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012981075] [2020-10-13 10:21:15,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:15,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:15,698 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-10-13 10:21:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:16,108 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-13 10:21:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:21:16,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-13 10:21:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:16,110 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:21:16,110 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:21:16,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:21:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2020-10-13 10:21:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:21:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:21:16,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-13 10:21:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:16,118 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:21:16,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:21:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:21:16,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:16,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:16,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:21:16,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-10-13 10:21:16,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:16,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272827900] [2020-10-13 10:21:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:21:16,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:16,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-13 10:21:16,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:21:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:21:16,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:16,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:16,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:21:16,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:16,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:16,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272827900] [2020-10-13 10:21:16,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:16,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:16,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544229534] [2020-10-13 10:21:16,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:16,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:16,462 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 10:21:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:16,679 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-13 10:21:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:21:16,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:21:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:16,682 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:21:16,682 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:21:16,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:21:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-13 10:21:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:21:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 10:21:16,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-13 10:21:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:16,694 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 10:21:16,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 10:21:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:21:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:16,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:16,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:21:16,697 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:16,698 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-10-13 10:21:16,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:16,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435670714] [2020-10-13 10:21:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:21:16,738 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:21:16,738 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:21:16,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:21:16,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:21:16 BoogieIcfgContainer [2020-10-13 10:21:16,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:21:16,778 INFO L168 Benchmark]: Toolchain (without parser) took 4487.73 ms. Allocated memory was 138.9 MB in the beginning and 248.5 MB in the end (delta: 109.6 MB). Free memory was 100.6 MB in the beginning and 214.4 MB in the end (delta: -113.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:21:16,779 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-13 10:21:16,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.96 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.3 MB in the beginning and 168.1 MB in the end (delta: -67.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:16,790 INFO L168 Benchmark]: Boogie Preprocessor took 74.81 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 165.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:16,791 INFO L168 Benchmark]: RCFGBuilder took 627.92 ms. Allocated memory is still 201.9 MB. Free memory was 165.4 MB in the beginning and 118.1 MB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:16,792 INFO L168 Benchmark]: TraceAbstraction took 3158.24 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 118.1 MB in the beginning and 214.4 MB in the end (delta: -96.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:21:16,803 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 621.96 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.3 MB in the beginning and 168.1 MB in the end (delta: -67.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.81 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 165.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 627.92 ms. Allocated memory is still 201.9 MB. Free memory was 165.4 MB in the beginning and 118.1 MB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3158.24 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 118.1 MB in the beginning and 214.4 MB in the end (delta: -96.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1040]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* list = malloc(sizeof(SLL)); [L995] list->next = ((void*)0) [L996] list->prev = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end = ((void*)0) [L1026] end = list [L1029] COND FALSE !(!(((void*)0) != end)) [L1030] EXPR end->colour [L1030] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE ((void*)0) != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1040] EXPR end->next [L1040] COND TRUE !(end->next) [L1040] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 108 SDslu, 183 SDs, 0 SdLazy, 309 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 46 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 4666 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...