/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=WIDEST --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-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:12:29,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:12:29,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:12:29,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:12:29,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:12:29,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:12:29,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:12:29,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:12:29,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:12:29,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:12:29,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:12:29,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:12:29,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:12:29,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:12:29,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:12:29,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:12:29,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:12:29,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:12:29,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:12:29,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:12:29,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:12:29,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:12:29,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:12:29,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:12:29,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:12:29,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:12:29,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:12:29,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:12:29,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:12:29,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:12:29,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:12:29,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:12:29,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:12:29,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:12:29,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:12:29,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:12:29,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:12:29,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:12:29,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:12:29,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:12:29,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:12:29,673 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 [2020-08-21 22:12:29,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:12:29,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:12:29,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:12:29,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:12:29,728 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:12:29,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:12:29,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:12:29,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:12:29,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:12:29,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:12:29,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:12:29,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:12:29,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:12:29,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:12:29,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:12:29,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:12:29,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:12:29,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:12:29,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:12:29,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:12:29,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:12:29,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:12:29,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:12:29,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:12:29,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:12:29,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:12:29,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:12:29,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:12:29,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:12:29,736 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:12:30,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:12:30,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:12:30,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:12:30,058 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:12:30,058 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:12:30,059 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-21 22:12:30,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ae3054bf/cb56f9119c6048cfaa6c297090d5fde1/FLAGb3d09b0e6 [2020-08-21 22:12:30,700 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:12:30,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-21 22:12:30,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ae3054bf/cb56f9119c6048cfaa6c297090d5fde1/FLAGb3d09b0e6 [2020-08-21 22:12:31,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ae3054bf/cb56f9119c6048cfaa6c297090d5fde1 [2020-08-21 22:12:31,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:12:31,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:12:31,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:12:31,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:12:31,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:12:31,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285e86f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31, skipping insertion in model container [2020-08-21 22:12:31,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:12:31,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:12:31,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:12:31,672 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:12:31,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:12:31,813 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:12:31,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31 WrapperNode [2020-08-21 22:12:31,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:12:31,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:12:31,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:12:31,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:12:31,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (1/1) ... [2020-08-21 22:12:31,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:12:31,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:12:31,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:12:31,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:12:31,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (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 [2020-08-21 22:12:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:12:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:12:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 22:12:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 22:12:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 22:12:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-08-21 22:12:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:12:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:12:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 22:12:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 22:12:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 22:12:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 22:12:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 22:12:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 22:12:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 22:12:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 22:12:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 22:12:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 22:12:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 22:12:31,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 22:12:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 22:12:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 22:12:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 22:12:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 22:12:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 22:12:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 22:12:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 22:12:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 22:12:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 22:12:31,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 22:12:31,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 22:12:31,953 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 22:12:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 22:12:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 22:12:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 22:12:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 22:12:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 22:12:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 22:12:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 22:12:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 22:12:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 22:12:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 22:12:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 22:12:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 22:12:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 22:12:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 22:12:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 22:12:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 22:12:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:12:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 22:12:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 22:12:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 22:12:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 22:12:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 22:12:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 22:12:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 22:12:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 22:12:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 22:12:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 22:12:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 22:12:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 22:12:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 22:12:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 22:12:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 22:12:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 22:12:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 22:12:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 22:12:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 22:12:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 22:12:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 22:12:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 22:12:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-08-21 22:12:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:12:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:12:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:12:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:12:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:12:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:12:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:12:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:12:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:12:32,286 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 22:12:32,520 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:12:32,521 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 22:12:32,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:12:32 BoogieIcfgContainer [2020-08-21 22:12:32,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:12:32,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:12:32,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:12:32,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:12:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:12:31" (1/3) ... [2020-08-21 22:12:32,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c0581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:12:32, skipping insertion in model container [2020-08-21 22:12:32,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:12:31" (2/3) ... [2020-08-21 22:12:32,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c0581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:12:32, skipping insertion in model container [2020-08-21 22:12:32,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:12:32" (3/3) ... [2020-08-21 22:12:32,533 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-08-21 22:12:32,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:12:32,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:12:32,565 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:12:32,589 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:12:32,589 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:12:32,589 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:12:32,589 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:12:32,590 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:12:32,590 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:12:32,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:12:32,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:12:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-21 22:12:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:12:32,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:32,613 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] [2020-08-21 22:12:32,613 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-08-21 22:12:32,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:32,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268525384] [2020-08-21 22:12:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:32,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:32,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268525384] [2020-08-21 22:12:32,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:12:32,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:12:32,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565630401] [2020-08-21 22:12:32,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:12:32,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:12:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:12:32,982 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-08-21 22:12:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:33,406 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-08-21 22:12:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:12:33,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 22:12:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:33,423 INFO L225 Difference]: With dead ends: 73 [2020-08-21 22:12:33,423 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:12:33,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:12:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:12:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-08-21 22:12:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:12:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-08-21 22:12:33,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-08-21 22:12:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:33,487 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-08-21 22:12:33,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:12:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-08-21 22:12:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:12:33,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:33,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:33,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:12:33,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:33,490 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-08-21 22:12:33,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:33,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983065284] [2020-08-21 22:12:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:33,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983065284] [2020-08-21 22:12:33,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:12:33,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:12:33,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20620417] [2020-08-21 22:12:33,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:12:33,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:33,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:12:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:12:33,644 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-08-21 22:12:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:33,823 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-08-21 22:12:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:12:33,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-21 22:12:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:33,825 INFO L225 Difference]: With dead ends: 63 [2020-08-21 22:12:33,825 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:12:33,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:12:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:12:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-08-21 22:12:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 22:12:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-08-21 22:12:33,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-08-21 22:12:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:33,835 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-08-21 22:12:33,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:12:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-08-21 22:12:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:12:33,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:33,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:33,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:12:33,837 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-08-21 22:12:33,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:33,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897851522] [2020-08-21 22:12:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:33,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897851522] [2020-08-21 22:12:33,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:12:33,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:12:33,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531008988] [2020-08-21 22:12:33,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:12:33,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:33,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:12:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:12:33,994 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 8 states. [2020-08-21 22:12:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:34,215 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-08-21 22:12:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:12:34,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 22:12:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:34,217 INFO L225 Difference]: With dead ends: 63 [2020-08-21 22:12:34,217 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 22:12:34,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:12:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 22:12:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 22:12:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 22:12:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-08-21 22:12:34,227 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-08-21 22:12:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:34,228 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-08-21 22:12:34,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:12:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-08-21 22:12:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 22:12:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:34,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:34,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:12:34,230 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-08-21 22:12:34,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:34,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596692442] [2020-08-21 22:12:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:34,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:34,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:34,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596692442] [2020-08-21 22:12:34,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:12:34,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:12:34,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745998585] [2020-08-21 22:12:34,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:12:34,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:12:34,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:12:34,523 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 9 states. [2020-08-21 22:12:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:34,760 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-08-21 22:12:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:12:34,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-21 22:12:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:34,762 INFO L225 Difference]: With dead ends: 70 [2020-08-21 22:12:34,762 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 22:12:34,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:12:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 22:12:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-08-21 22:12:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 22:12:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-08-21 22:12:34,777 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-08-21 22:12:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:34,779 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-08-21 22:12:34,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:12:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-08-21 22:12:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 22:12:34,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:34,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:34,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:12:34,781 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1408994219, now seen corresponding path program 2 times [2020-08-21 22:12:34,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:34,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210512914] [2020-08-21 22:12:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:34,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:34,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210512914] [2020-08-21 22:12:35,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:12:35,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:12:35,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239242318] [2020-08-21 22:12:35,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:12:35,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:12:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:12:35,032 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 10 states. [2020-08-21 22:12:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:35,240 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-08-21 22:12:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:12:35,240 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-08-21 22:12:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:35,242 INFO L225 Difference]: With dead ends: 77 [2020-08-21 22:12:35,242 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:12:35,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:12:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:12:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-21 22:12:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:12:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-08-21 22:12:35,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 41 [2020-08-21 22:12:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:35,251 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-08-21 22:12:35,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:12:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-08-21 22:12:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 22:12:35,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:35,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:35,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:12:35,253 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2107131782, now seen corresponding path program 3 times [2020-08-21 22:12:35,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:35,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097666967] [2020-08-21 22:12:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-21 22:12:35,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097666967] [2020-08-21 22:12:35,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:12:35,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:12:35,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375718366] [2020-08-21 22:12:35,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:12:35,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:12:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:12:35,368 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-08-21 22:12:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:35,528 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-08-21 22:12:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:12:35,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-08-21 22:12:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:35,536 INFO L225 Difference]: With dead ends: 71 [2020-08-21 22:12:35,536 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 22:12:35,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:12:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 22:12:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-21 22:12:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 22:12:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-08-21 22:12:35,545 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 48 [2020-08-21 22:12:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:35,545 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-08-21 22:12:35,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:12:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-08-21 22:12:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 22:12:35,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:35,549 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:35,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:12:35,550 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 1 times [2020-08-21 22:12:35,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:35,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712316512] [2020-08-21 22:12:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:12:35,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712316512] [2020-08-21 22:12:35,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:12:35,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:12:35,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137506248] [2020-08-21 22:12:35,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:12:35,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:12:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:12:35,795 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 11 states. [2020-08-21 22:12:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:35,996 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-08-21 22:12:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:12:35,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-08-21 22:12:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:35,998 INFO L225 Difference]: With dead ends: 90 [2020-08-21 22:12:35,998 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 22:12:35,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:12:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 22:12:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-21 22:12:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 22:12:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-08-21 22:12:36,006 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-08-21 22:12:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:36,007 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-08-21 22:12:36,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:12:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-08-21 22:12:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:12:36,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:36,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:36,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:12:36,009 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 2 times [2020-08-21 22:12:36,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:36,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588027615] [2020-08-21 22:12:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:36,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:12:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:36,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:12:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:12:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-21 22:12:36,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588027615] [2020-08-21 22:12:36,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:12:36,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:12:36,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703725796] [2020-08-21 22:12:36,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:12:36,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:12:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:12:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:12:36,345 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 14 states. [2020-08-21 22:12:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:12:36,838 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-08-21 22:12:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:12:36,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 22:12:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:12:36,840 INFO L225 Difference]: With dead ends: 83 [2020-08-21 22:12:36,840 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:12:36,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:12:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:12:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-08-21 22:12:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 22:12:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-08-21 22:12:36,854 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-08-21 22:12:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:12:36,855 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-08-21 22:12:36,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:12:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-08-21 22:12:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:12:36,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:12:36,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:12:36,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:12:36,860 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:12:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:12:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-08-21 22:12:36,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:12:36,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392359608] [2020-08-21 22:12:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:12:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:12:36,937 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:12:36,937 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:12:36,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:12:36,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:12:36 BoogieIcfgContainer [2020-08-21 22:12:36,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:12:36,998 INFO L168 Benchmark]: Toolchain (without parser) took 5868.77 ms. Allocated memory was 137.9 MB in the beginning and 298.8 MB in the end (delta: 161.0 MB). Free memory was 99.6 MB in the beginning and 207.4 MB in the end (delta: -107.8 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:12:36,999 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:12:37,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.88 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 99.4 MB in the beginning and 163.5 MB in the end (delta: -64.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:12:37,001 INFO L168 Benchmark]: Boogie Preprocessor took 63.06 ms. Allocated memory is still 199.8 MB. Free memory was 163.5 MB in the beginning and 160.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:12:37,003 INFO L168 Benchmark]: RCFGBuilder took 645.75 ms. Allocated memory is still 199.8 MB. Free memory was 160.1 MB in the beginning and 113.6 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:12:37,004 INFO L168 Benchmark]: TraceAbstraction took 4464.28 ms. Allocated memory was 199.8 MB in the beginning and 298.8 MB in the end (delta: 99.1 MB). Free memory was 113.6 MB in the beginning and 207.4 MB in the end (delta: -93.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:12:37,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 689.88 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 99.4 MB in the beginning and 163.5 MB in the end (delta: -64.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.06 ms. Allocated memory is still 199.8 MB. Free memory was 163.5 MB in the beginning and 160.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 645.75 ms. Allocated memory is still 199.8 MB. Free memory was 160.1 MB in the beginning and 113.6 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4464.28 ms. Allocated memory was 199.8 MB in the beginning and 298.8 MB in the end (delta: 99.1 MB). Free memory was 113.6 MB in the beginning and 207.4 MB in the end (delta: -93.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 282 SDtfs, 342 SDslu, 1152 SDs, 0 SdLazy, 946 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, 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, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 292 ConstructedInterpolants, 0 QuantifiedInterpolants, 37094 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 115/202 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...