/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:55:32,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:55:32,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:55:32,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:55:32,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:55:32,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:55:32,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:55:32,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:55:32,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:55:32,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:55:32,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:55:32,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:55:32,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:55:32,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:55:32,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:55:32,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:55:32,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:55:32,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:55:32,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:55:32,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:55:32,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:55:32,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:55:32,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:55:32,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:55:32,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:55:32,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:55:32,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:55:32,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:55:32,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:55:32,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:55:32,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:55:32,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:55:32,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:55:32,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:55:32,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:55:32,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:55:32,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:55:32,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:55:32,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:55:32,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:55:32,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:55:32,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:55:32,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:55:32,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:55:32,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:55:32,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:55:32,963 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:55:32,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:55:32,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:55:32,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:55:32,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:55:32,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:55:32,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:55:32,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:55:32,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:55:32,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:55:32,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:55:32,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:55:32,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:55:32,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:55:32,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:55:32,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:55:32,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:55:32,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:55:32,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:55:32,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:55:32,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:55:32,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:55:32,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:32,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:55:32,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:55:32,968 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:55:33,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:55:33,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:55:33,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:55:33,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:55:33,377 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:55:33,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 21:55:33,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8217602/2e43da5cf1764998a55728196ac75302/FLAG5f6ac555a [2020-07-20 21:55:34,033 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:55:34,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 21:55:34,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8217602/2e43da5cf1764998a55728196ac75302/FLAG5f6ac555a [2020-07-20 21:55:34,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8217602/2e43da5cf1764998a55728196ac75302 [2020-07-20 21:55:34,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:55:34,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:55:34,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:55:34,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:55:34,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:55:34,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:55:34" (1/1) ... [2020-07-20 21:55:34,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628ddbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:34, skipping insertion in model container [2020-07-20 21:55:34,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:55:34" (1/1) ... [2020-07-20 21:55:34,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:55:34,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:55:34,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:55:34,901 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:55:34,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:55:35,027 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:55:35,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35 WrapperNode [2020-07-20 21:55:35,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:55:35,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:55:35,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:55:35,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:55:35,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... [2020-07-20 21:55:35,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:55:35,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:55:35,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:55:35,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:55:35,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 21:55:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:55:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:55:35,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:55:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:55:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:55:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:55:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:55:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:55:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:55:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:55:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:55:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:55:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:55:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:55:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:55:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:55:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:55:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:55:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 21:55:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:55:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:55:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:55:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:55:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:55:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:55:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:55:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:55:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:55:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:55:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:55:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:55:35,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:55:35,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:55:35,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:55:35,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:55:35,783 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:55:35,784 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-20 21:55:35,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:55:35 BoogieIcfgContainer [2020-07-20 21:55:35,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:55:35,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:55:35,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:55:35,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:55:35,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:55:34" (1/3) ... [2020-07-20 21:55:35,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ed67fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:55:35, skipping insertion in model container [2020-07-20 21:55:35,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:35" (2/3) ... [2020-07-20 21:55:35,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ed67fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:55:35, skipping insertion in model container [2020-07-20 21:55:35,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:55:35" (3/3) ... [2020-07-20 21:55:35,799 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-07-20 21:55:35,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:55:35,822 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 21:55:35,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 21:55:35,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:55:35,863 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:55:35,863 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:55:35,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:55:35,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:55:35,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:55:35,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:55:35,863 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:55:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 21:55:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 21:55:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:35,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:35,890 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-20 21:55:35,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:35,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712258990] [2020-07-20 21:55:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:36,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:55:36,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:36,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:36,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712258990] [2020-07-20 21:55:36,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:36,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:55:36,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440352895] [2020-07-20 21:55:36,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:55:36,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:55:36,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:55:36,271 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-07-20 21:55:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:36,407 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2020-07-20 21:55:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:55:36,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 21:55:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:36,423 INFO L225 Difference]: With dead ends: 67 [2020-07-20 21:55:36,423 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 21:55:36,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 21:55:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-20 21:55:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 21:55:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 21:55:36,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-07-20 21:55:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:36,479 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 21:55:36,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:55:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 21:55:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:55:36,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:36,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:36,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:36,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-20 21:55:36,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:36,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031876806] [2020-07-20 21:55:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:36,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:36,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:55:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:36,881 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:55:36,882 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:36,887 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:36,888 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:36,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 21:55:36,921 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:36,922 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:36,928 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:36,928 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:36,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 21:55:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:36,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:36,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031876806] [2020-07-20 21:55:36,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:36,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:36,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040306664] [2020-07-20 21:55:36,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:36,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:36,942 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 21:55:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:37,057 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 21:55:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:55:37,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:55:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:37,060 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:55:37,060 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 21:55:37,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 21:55:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-20 21:55:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 21:55:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 21:55:37,071 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-20 21:55:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:37,072 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 21:55:37,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 21:55:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 21:55:37,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:37,073 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:37,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:37,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-20 21:55:37,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:37,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938234537] [2020-07-20 21:55:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:37,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 21:55:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:37,558 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:37,559 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,571 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,578 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:55:37,578 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,589 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,590 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,591 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2020-07-20 21:55:37,655 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,657 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 21:55:37,659 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,724 INFO L624 ElimStorePlain]: treesize reduction 14, result has 80.3 percent of original size [2020-07-20 21:55:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:37,739 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 21:55:37,741 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,760 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,766 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 21:55:37,767 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,779 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,781 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,781 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:24 [2020-07-20 21:55:37,876 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,877 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 21:55:37,879 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:37,915 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,918 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_26|, |v_#memory_int_27|], 4=[|v_#memory_int_29|]} [2020-07-20 21:55:37,926 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:37,954 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:37,959 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:37,998 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:38,031 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-20 21:55:38,032 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-20 21:55:38,035 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:38,058 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,063 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,063 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:40 [2020-07-20 21:55:38,201 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2020-07-20 21:55:38,203 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:38,215 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,216 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:38,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:49, output treesize:3 [2020-07-20 21:55:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:38,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:55:38,295 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_27|], 3=[|v_#memory_int_26|]} [2020-07-20 21:55:38,300 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,324 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,328 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,349 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,352 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,353 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:55 [2020-07-20 21:55:38,423 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_25|], 6=[|v_#memory_int_31|]} [2020-07-20 21:55:38,429 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,460 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,465 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,489 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:38,492 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:38,492 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:96, output treesize:102 [2020-07-20 21:55:40,689 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:40,690 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2020-07-20 21:55:40,691 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:40,695 INFO L624 ElimStorePlain]: treesize reduction 119, result has 0.8 percent of original size [2020-07-20 21:55:40,697 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_24| vanished before elimination [2020-07-20 21:55:40,697 INFO L544 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:40,698 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:132, output treesize:1 [2020-07-20 21:55:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:40,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938234537] [2020-07-20 21:55:40,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:55:40,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 21:55:40,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552954761] [2020-07-20 21:55:40,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:55:40,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:55:40,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 21:55:40,710 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-20 21:55:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:47,392 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-20 21:55:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:55:47,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 21:55:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:47,395 INFO L225 Difference]: With dead ends: 64 [2020-07-20 21:55:47,395 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 21:55:47,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 21:55:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 21:55:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-20 21:55:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 21:55:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 21:55:47,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-20 21:55:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:47,403 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 21:55:47,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:55:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 21:55:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:55:47,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:47,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:47,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:47,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-20 21:55:47,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:47,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584737001] [2020-07-20 21:55:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:47,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:47,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:55:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:47,734 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:55:47,735 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:47,738 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:47,739 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:47,739 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 21:55:47,756 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:47,757 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:47,760 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:47,760 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:47,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 21:55:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:47,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584737001] [2020-07-20 21:55:47,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:47,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:47,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599384002] [2020-07-20 21:55:47,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:47,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:47,800 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-20 21:55:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:47,920 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-07-20 21:55:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:55:47,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 21:55:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:47,922 INFO L225 Difference]: With dead ends: 55 [2020-07-20 21:55:47,923 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 21:55:47,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 21:55:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-07-20 21:55:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 21:55:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 21:55:47,932 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2020-07-20 21:55:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:47,932 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 21:55:47,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 21:55:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:55:47,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:47,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:48,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:48,148 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-20 21:55:48,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:48,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036659464] [2020-07-20 21:55:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:48,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:55:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:55:48,256 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:55:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:55:48,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:55:48,291 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:55:48,291 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:55:48,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:48,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:55:48 BoogieIcfgContainer [2020-07-20 21:55:48,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:55:48,540 INFO L168 Benchmark]: Toolchain (without parser) took 14213.38 ms. Allocated memory was 144.2 MB in the beginning and 251.1 MB in the end (delta: 107.0 MB). Free memory was 101.1 MB in the beginning and 177.3 MB in the end (delta: -76.1 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:55:48,541 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:55:48,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.81 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.7 MB in the beginning and 169.3 MB in the end (delta: -68.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:55:48,543 INFO L168 Benchmark]: Boogie Preprocessor took 73.60 ms. Allocated memory is still 201.9 MB. Free memory was 169.3 MB in the beginning and 166.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:55:48,543 INFO L168 Benchmark]: RCFGBuilder took 684.88 ms. Allocated memory is still 201.9 MB. Free memory was 166.5 MB in the beginning and 121.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:55:48,544 INFO L168 Benchmark]: TraceAbstraction took 12747.93 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 121.1 MB in the beginning and 177.3 MB in the end (delta: -56.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 21:55:48,547 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 698.81 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.7 MB in the beginning and 169.3 MB in the end (delta: -68.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.60 ms. Allocated memory is still 201.9 MB. Free memory was 169.3 MB in the beginning and 166.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 684.88 ms. Allocated memory is still 201.9 MB. Free memory was 166.5 MB in the beginning and 121.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12747.93 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 121.1 MB in the beginning and 177.3 MB in the end (delta: -56.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 170 SDslu, 286 SDs, 0 SdLazy, 215 SolverSat, 53 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 78 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 79 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 72 ConstructedInterpolants, 9 QuantifiedInterpolants, 13069 SizeOfPredicates, 24 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 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...