/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:51:31,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:51:31,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:51:31,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:51:31,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:51:31,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:51:31,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:51:31,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:51:31,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:51:31,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:51:31,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:51:31,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:51:31,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:51:31,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:51:31,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:51:31,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:51:31,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:51:31,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:51:31,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:51:31,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:51:31,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:51:31,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:51:31,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:51:31,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:51:31,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:51:31,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:51:31,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:51:31,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:51:31,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:51:31,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:51:31,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:51:31,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:51:31,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:51:31,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:51:31,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:51:31,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:51:31,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:51:31,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:51:31,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:51:31,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:51:31,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:51:31,986 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 [2020-08-22 03:51:32,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:51:32,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:51:32,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:51:32,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:51:32,010 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:51:32,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:51:32,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:51:32,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:51:32,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:51:32,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:51:32,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:51:32,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:51:32,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:51:32,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:51:32,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:51:32,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:51:32,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:51:32,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:51:32,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:51:32,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:51:32,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:51:32,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:32,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:51:32,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:51:32,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:51:32,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:51:32,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:51:32,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:51:32,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:51:32,015 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:51:32,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:51:32,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:51:32,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:51:32,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:51:32,320 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:51:32,321 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 03:51:32,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf6e8f924/14a20d2c62ff413387406e8fa89bb53b/FLAGa7988a7b7 [2020-08-22 03:51:32,878 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:51:32,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 03:51:32,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf6e8f924/14a20d2c62ff413387406e8fa89bb53b/FLAGa7988a7b7 [2020-08-22 03:51:33,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf6e8f924/14a20d2c62ff413387406e8fa89bb53b [2020-08-22 03:51:33,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:51:33,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:51:33,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:33,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:51:33,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:51:33,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c454e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33, skipping insertion in model container [2020-08-22 03:51:33,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:51:33,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:51:33,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:33,757 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:51:33,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:33,887 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:51:33,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33 WrapperNode [2020-08-22 03:51:33,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:33,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:51:33,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:51:33,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:51:33,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (1/1) ... [2020-08-22 03:51:33,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:51:33,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:51:33,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:51:33,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:51:33,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (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 [2020-08-22 03:51:34,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:51:34,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:51:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 03:51:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 03:51:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-22 03:51:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-22 03:51:34,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-22 03:51:34,026 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 03:51:34,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:51:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:51:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:51:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 03:51:34,028 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 03:51:34,028 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 03:51:34,028 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 03:51:34,029 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 03:51:34,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 03:51:34,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 03:51:34,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 03:51:34,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 03:51:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 03:51:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 03:51:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 03:51:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 03:51:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 03:51:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 03:51:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 03:51:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 03:51:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 03:51:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-22 03:51:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-22 03:51:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-22 03:51:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 03:51:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 03:51:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 03:51:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 03:51:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 03:51:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 03:51:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 03:51:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 03:51:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 03:51:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 03:51:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 03:51:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 03:51:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 03:51:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 03:51:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 03:51:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 03:51:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 03:51:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 03:51:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 03:51:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 03:51:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 03:51:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 03:51:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 03:51:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 03:51:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 03:51:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:51:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 03:51:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 03:51:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 03:51:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 03:51:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 03:51:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 03:51:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 03:51:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:51:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:51:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:51:34,440 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 03:51:34,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:51:34,592 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 03:51:34,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:34 BoogieIcfgContainer [2020-08-22 03:51:34,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:51:34,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:51:34,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:51:34,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:51:34,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:51:33" (1/3) ... [2020-08-22 03:51:34,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408ae94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:34, skipping insertion in model container [2020-08-22 03:51:34,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:33" (2/3) ... [2020-08-22 03:51:34,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408ae94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:34, skipping insertion in model container [2020-08-22 03:51:34,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:34" (3/3) ... [2020-08-22 03:51:34,609 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-22 03:51:34,620 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:51:34,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:51:34,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:51:34,677 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:51:34,678 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:51:34,678 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:51:34,678 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:51:34,678 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:51:34,678 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:51:34,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:51:34,679 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:51:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 03:51:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:51:34,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:34,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:34,704 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-08-22 03:51:34,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:34,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672279484] [2020-08-22 03:51:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:34,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672279484] [2020-08-22 03:51:34,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:34,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:34,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164804649] [2020-08-22 03:51:34,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:34,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:35,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:35,005 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 03:51:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,136 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-22 03:51:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:35,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 03:51:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,149 INFO L225 Difference]: With dead ends: 56 [2020-08-22 03:51:35,149 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 03:51:35,153 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 [2020-08-22 03:51:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 03:51:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 03:51:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 03:51:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-22 03:51:35,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-08-22 03:51:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,200 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-22 03:51:35,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-22 03:51:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:35,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,202 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] [2020-08-22 03:51:35,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:51:35,202 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-08-22 03:51:35,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215917113] [2020-08-22 03:51:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:35,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215917113] [2020-08-22 03:51:35,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:35,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:51:35,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121688342] [2020-08-22 03:51:35,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:51:35,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:51:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:51:35,344 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-22 03:51:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,495 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 03:51:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:51:35,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 03:51:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,499 INFO L225 Difference]: With dead ends: 50 [2020-08-22 03:51:35,499 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 03:51:35,500 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 [2020-08-22 03:51:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 03:51:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-08-22 03:51:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 03:51:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-08-22 03:51:35,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-08-22 03:51:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,519 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-08-22 03:51:35,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:51:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-08-22 03:51:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:35,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:35,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:51:35,521 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-08-22 03:51:35,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923710110] [2020-08-22 03:51:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:35,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923710110] [2020-08-22 03:51:35,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:35,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:51:35,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122496628] [2020-08-22 03:51:35,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:51:35,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:51:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:51:35,608 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-08-22 03:51:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,752 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 03:51:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:51:35,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 03:51:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,754 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:51:35,754 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 03:51:35,755 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 [2020-08-22 03:51:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 03:51:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-08-22 03:51:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 03:51:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-08-22 03:51:35,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-08-22 03:51:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,762 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-08-22 03:51:35,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:51:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-08-22 03:51:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,763 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:35,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:51:35,764 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-08-22 03:51:35,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707931255] [2020-08-22 03:51:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:35,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707931255] [2020-08-22 03:51:35,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:35,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:51:35,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368556727] [2020-08-22 03:51:35,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:51:35,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:51:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:51:35,858 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-08-22 03:51:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,976 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 03:51:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:51:35,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 03:51:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,978 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:51:35,978 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 03:51:35,979 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 [2020-08-22 03:51:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 03:51:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-08-22 03:51:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 03:51:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 03:51:35,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-08-22 03:51:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,985 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 03:51:35,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:51:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 03:51:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:35,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:35,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:51:35,986 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-08-22 03:51:35,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453917356] [2020-08-22 03:51:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:36,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453917356] [2020-08-22 03:51:36,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:36,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:51:36,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426404031] [2020-08-22 03:51:36,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:51:36,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:51:36,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:51:36,123 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-08-22 03:51:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:36,358 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-22 03:51:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:51:36,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 03:51:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:36,360 INFO L225 Difference]: With dead ends: 54 [2020-08-22 03:51:36,360 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:51:36,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:51:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:51:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-08-22 03:51:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:51:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-22 03:51:36,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-08-22 03:51:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:36,368 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-22 03:51:36,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:51:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-22 03:51:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:36,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:36,369 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:36,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:51:36,370 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-08-22 03:51:36,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:36,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286778192] [2020-08-22 03:51:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:36,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286778192] [2020-08-22 03:51:36,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:36,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:51:36,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963736861] [2020-08-22 03:51:36,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:51:36,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:51:36,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:51:36,506 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-08-22 03:51:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:36,750 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-08-22 03:51:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:51:36,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 03:51:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:36,752 INFO L225 Difference]: With dead ends: 63 [2020-08-22 03:51:36,752 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 03:51:36,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:51:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 03:51:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-22 03:51:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 03:51:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-22 03:51:36,759 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-08-22 03:51:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:36,759 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-22 03:51:36,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:51:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-22 03:51:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:51:36,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:36,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:36,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:51:36,761 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-08-22 03:51:36,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:36,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75936218] [2020-08-22 03:51:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:36,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75936218] [2020-08-22 03:51:36,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:36,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:51:36,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808577832] [2020-08-22 03:51:36,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:51:36,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:51:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:51:36,934 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-08-22 03:51:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:37,248 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-08-22 03:51:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:51:37,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 03:51:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:37,249 INFO L225 Difference]: With dead ends: 67 [2020-08-22 03:51:37,250 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 03:51:37,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:51:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 03:51:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-08-22 03:51:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 03:51:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-22 03:51:37,261 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-08-22 03:51:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:37,262 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-22 03:51:37,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:51:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-22 03:51:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:51:37,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:37,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:37,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:51:37,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-08-22 03:51:37,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:37,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144891370] [2020-08-22 03:51:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:37,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144891370] [2020-08-22 03:51:37,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:37,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:51:37,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555916180] [2020-08-22 03:51:37,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:51:37,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:51:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:51:37,478 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-08-22 03:51:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:37,767 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-08-22 03:51:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:51:37,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 03:51:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:37,769 INFO L225 Difference]: With dead ends: 69 [2020-08-22 03:51:37,769 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 03:51:37,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:51:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 03:51:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-08-22 03:51:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:51:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-08-22 03:51:37,776 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-08-22 03:51:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:37,777 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-08-22 03:51:37,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:51:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-08-22 03:51:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:51:37,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:37,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:37,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:51:37,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-08-22 03:51:37,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:37,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640858489] [2020-08-22 03:51:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:37,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640858489] [2020-08-22 03:51:37,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:37,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:51:37,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198094285] [2020-08-22 03:51:37,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:51:37,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:51:37,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:51:37,972 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-08-22 03:51:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:38,244 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 03:51:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:51:38,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 03:51:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:38,248 INFO L225 Difference]: With dead ends: 62 [2020-08-22 03:51:38,248 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 03:51:38,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:51:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 03:51:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-22 03:51:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 03:51:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-22 03:51:38,253 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-08-22 03:51:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:38,254 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-22 03:51:38,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:51:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-22 03:51:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:51:38,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:38,255 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:38,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:51:38,255 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-08-22 03:51:38,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:38,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833000413] [2020-08-22 03:51:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:38,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833000413] [2020-08-22 03:51:38,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:38,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:51:38,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069000514] [2020-08-22 03:51:38,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:51:38,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:51:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:51:38,438 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 13 states. [2020-08-22 03:51:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:38,881 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 03:51:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:51:38,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-22 03:51:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:38,883 INFO L225 Difference]: With dead ends: 62 [2020-08-22 03:51:38,883 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 03:51:38,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:51:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 03:51:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-08-22 03:51:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 03:51:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-22 03:51:38,889 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-08-22 03:51:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:38,890 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-22 03:51:38,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:51:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-22 03:51:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:51:38,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:38,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:38,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:51:38,891 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-08-22 03:51:38,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:38,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621841915] [2020-08-22 03:51:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:39,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621841915] [2020-08-22 03:51:39,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:39,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:51:39,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999358321] [2020-08-22 03:51:39,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:51:39,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:51:39,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:51:39,110 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-08-22 03:51:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:39,674 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-08-22 03:51:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:51:39,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-22 03:51:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:39,676 INFO L225 Difference]: With dead ends: 75 [2020-08-22 03:51:39,676 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 03:51:39,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:51:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 03:51:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-08-22 03:51:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 03:51:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-08-22 03:51:39,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2020-08-22 03:51:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:39,683 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-08-22 03:51:39,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:51:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-08-22 03:51:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:51:39,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:39,685 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:39,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:51:39,685 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 1 times [2020-08-22 03:51:39,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:39,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368229975] [2020-08-22 03:51:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:39,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368229975] [2020-08-22 03:51:39,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:39,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:51:39,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968576166] [2020-08-22 03:51:39,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:51:39,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:39,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:51:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:51:39,872 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-08-22 03:51:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:40,280 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-22 03:51:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:51:40,280 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 03:51:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:40,282 INFO L225 Difference]: With dead ends: 77 [2020-08-22 03:51:40,282 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 03:51:40,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:51:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 03:51:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-08-22 03:51:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 03:51:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-08-22 03:51:40,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 30 [2020-08-22 03:51:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:40,290 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-08-22 03:51:40,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:51:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-08-22 03:51:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:51:40,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:40,291 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:40,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:51:40,292 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-08-22 03:51:40,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:40,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161036567] [2020-08-22 03:51:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:40,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161036567] [2020-08-22 03:51:40,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:40,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:51:40,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057289184] [2020-08-22 03:51:40,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:51:40,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:51:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:51:40,559 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 13 states. [2020-08-22 03:51:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:41,113 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-08-22 03:51:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:51:41,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 03:51:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:41,114 INFO L225 Difference]: With dead ends: 84 [2020-08-22 03:51:41,114 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 03:51:41,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:51:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 03:51:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-22 03:51:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 03:51:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-08-22 03:51:41,132 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 30 [2020-08-22 03:51:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:41,132 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-08-22 03:51:41,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:51:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-08-22 03:51:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:51:41,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:41,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:41,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:51:41,137 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-08-22 03:51:41,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:41,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29238552] [2020-08-22 03:51:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:51:41,155 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:51:41,155 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:51:41,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:51:41,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:51:41 BoogieIcfgContainer [2020-08-22 03:51:41,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:51:41,185 INFO L168 Benchmark]: Toolchain (without parser) took 7925.67 ms. Allocated memory was 138.9 MB in the beginning and 313.5 MB in the end (delta: 174.6 MB). Free memory was 100.5 MB in the beginning and 241.2 MB in the end (delta: -140.7 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:41,186 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 03:51:41,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.36 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.2 MB in the beginning and 167.0 MB in the end (delta: -66.8 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:41,187 INFO L168 Benchmark]: Boogie Preprocessor took 65.43 ms. Allocated memory is still 201.3 MB. Free memory was 167.0 MB in the beginning and 164.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:41,190 INFO L168 Benchmark]: RCFGBuilder took 643.02 ms. Allocated memory is still 201.3 MB. Free memory was 164.4 MB in the beginning and 119.2 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:41,191 INFO L168 Benchmark]: TraceAbstraction took 6578.82 ms. Allocated memory was 201.3 MB in the beginning and 313.5 MB in the end (delta: 112.2 MB). Free memory was 118.5 MB in the beginning and 241.2 MB in the end (delta: -122.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:51:41,197 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 628.36 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.2 MB in the beginning and 167.0 MB in the end (delta: -66.8 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.43 ms. Allocated memory is still 201.3 MB. Free memory was 167.0 MB in the beginning and 164.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 643.02 ms. Allocated memory is still 201.3 MB. Free memory was 164.4 MB in the beginning and 119.2 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6578.82 ms. Allocated memory was 201.3 MB in the beginning and 313.5 MB in the end (delta: 112.2 MB). Free memory was 118.5 MB in the beginning and 241.2 MB in the end (delta: -122.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 552 SDslu, 1158 SDs, 0 SdLazy, 2018 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 313 ConstructedInterpolants, 0 QuantifiedInterpolants, 70246 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 12/58 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...