/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 BIGGEST_EQUIVALENCE_CLASS --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-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:45:02,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:45:02,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:45:02,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:45:02,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:45:02,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:45:02,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:45:02,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:45:02,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:45:02,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:45:02,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:45:02,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:45:02,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:45:02,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:45:02,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:45:02,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:45:02,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:45:02,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:45:02,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:45:02,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:45:02,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:45:02,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:45:02,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:45:02,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:45:02,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:45:02,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:45:02,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:45:02,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:45:02,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:45:02,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:45:02,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:45:02,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:45:02,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:45:02,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:45:02,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:45:02,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:45:02,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:45:02,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:45:02,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:45:02,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:45:02,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:45:02,270 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 [2020-07-21 22:45:02,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:45:02,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:45:02,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:45:02,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:45:02,295 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:45:02,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:45:02,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:45:02,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:45:02,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:45:02,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:45:02,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:45:02,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:45:02,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:45:02,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:45:02,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:45:02,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:45:02,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:45:02,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:45:02,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:45:02,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:45:02,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:45:02,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:02,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:45:02,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:45:02,300 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:45:02,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:45:02,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:45:02,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:45:02,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:45:02,750 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:45:02,751 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 22:45:02,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711515be4/726b6bffa82f4281a68ee9f328b7208e/FLAGa1c9cb217 [2020-07-21 22:45:03,817 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:45:03,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 22:45:03,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711515be4/726b6bffa82f4281a68ee9f328b7208e/FLAGa1c9cb217 [2020-07-21 22:45:03,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711515be4/726b6bffa82f4281a68ee9f328b7208e [2020-07-21 22:45:04,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:45:04,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:45:04,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:45:04,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:45:04,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:45:04,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:45:03" (1/1) ... [2020-07-21 22:45:04,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19856784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:04, skipping insertion in model container [2020-07-21 22:45:04,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:45:03" (1/1) ... [2020-07-21 22:45:04,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:45:04,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:45:05,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:45:05,050 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:45:05,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:45:05,180 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:45:05,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05 WrapperNode [2020-07-21 22:45:05,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:45:05,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:45:05,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:45:05,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:45:05,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (1/1) ... [2020-07-21 22:45:05,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:45:05,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:45:05,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:45:05,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:45:05,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (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 [2020-07-21 22:45:05,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:45:05,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:45:05,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:45:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 22:45:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 22:45:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 22:45:05,394 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 22:45:05,394 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 22:45:05,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 22:45:05,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 22:45:05,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 22:45:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 22:45:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 22:45:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 22:45:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 22:45:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 22:45:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 22:45:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 22:45:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 22:45:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 22:45:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 22:45:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 22:45:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 22:45:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 22:45:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 22:45:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 22:45:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 22:45:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 22:45:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 22:45:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 22:45:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 22:45:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 22:45:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 22:45:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 22:45:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 22:45:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 22:45:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 22:45:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 22:45:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 22:45:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 22:45:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 22:45:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 22:45:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:45:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 22:45:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 22:45:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 22:45:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 22:45:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 22:45:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 22:45:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 22:45:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 22:45:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 22:45:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 22:45:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 22:45:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 22:45:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 22:45:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 22:45:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 22:45:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 22:45:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 22:45:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 22:45:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 22:45:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 22:45:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 22:45:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 22:45:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 22:45:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 22:45:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 22:45:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 22:45:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 22:45:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 22:45:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:45:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:45:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:45:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 22:45:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 22:45:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:45:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 22:45:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:45:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:45:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:45:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:45:06,299 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:45:06,300 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-21 22:45:06,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:45:06 BoogieIcfgContainer [2020-07-21 22:45:06,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:45:06,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:45:06,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:45:06,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:45:06,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:45:03" (1/3) ... [2020-07-21 22:45:06,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1582d118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:45:06, skipping insertion in model container [2020-07-21 22:45:06,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:45:05" (2/3) ... [2020-07-21 22:45:06,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1582d118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:45:06, skipping insertion in model container [2020-07-21 22:45:06,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:45:06" (3/3) ... [2020-07-21 22:45:06,321 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-07-21 22:45:06,341 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:45:06,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 22:45:06,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 22:45:06,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:45:06,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:45:06,426 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:45:06,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:45:06,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:45:06,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:45:06,426 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:45:06,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:45:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 22:45:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 22:45:06,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:45:06,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:45:06,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:45:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:45:06,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times [2020-07-21 22:45:06,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:45:06,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655784388] [2020-07-21 22:45:06,505 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 [2020-07-21 22:45:06,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:45:06,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:45:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:45:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:45:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:45:06,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:45:06,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655784388] [2020-07-21 22:45:06,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:45:06,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:45:06,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441279996] [2020-07-21 22:45:06,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:45:06,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:45:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:45:06,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:45:06,913 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-21 22:45:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:45:06,965 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-07-21 22:45:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:45:06,969 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 22:45:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:45:06,987 INFO L225 Difference]: With dead ends: 70 [2020-07-21 22:45:06,988 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:45:06,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:45:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:45:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:45:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:45:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-21 22:45:07,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2020-07-21 22:45:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:45:07,108 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-21 22:45:07,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:45:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-21 22:45:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 22:45:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:45:07,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:45:07,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:07,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:45:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:45:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1199756337, now seen corresponding path program 1 times [2020-07-21 22:45:07,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:45:07,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803140] [2020-07-21 22:45:07,329 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 [2020-07-21 22:45:07,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:45:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:45:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:45:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:45:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:45:07,615 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 22:45:07,616 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:45:07,644 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:45:07,646 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:45:07,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:18 [2020-07-21 22:45:07,703 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:45:07,714 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:45:07,725 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 treesize of output 16 [2020-07-21 22:45:07,742 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2020-07-21 22:45:07,744 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2020-07-21 22:45:07,761 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-21 22:45:07,762 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:45:07,769 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:45:07,772 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:45:07,773 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:38, output treesize:4 [2020-07-21 22:45:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:45:07,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:45:07,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803140] [2020-07-21 22:45:07,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:45:07,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:45:07,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649294259] [2020-07-21 22:45:07,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:45:07,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:45:07,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:45:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:45:07,790 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-07-21 22:45:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:45:07,913 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-07-21 22:45:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:45:07,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 22:45:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:45:07,915 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:45:07,915 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:45:07,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:45:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:45:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-07-21 22:45:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 22:45:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 22:45:07,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2020-07-21 22:45:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:45:07,931 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 22:45:07,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:45:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 22:45:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:45:07,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:45:07,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:45:08,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:08,148 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:45:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:45:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times [2020-07-21 22:45:08,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:45:08,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355280339] [2020-07-21 22:45:08,152 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 [2020-07-21 22:45:08,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:45:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:45:08,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:45:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:45:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:45:08,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:45:08,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355280339] [2020-07-21 22:45:08,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:45:08,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:45:08,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386881347] [2020-07-21 22:45:08,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:45:08,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:45:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:45:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:45:08,341 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2020-07-21 22:45:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:45:08,383 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-07-21 22:45:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:45:08,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 22:45:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:45:08,390 INFO L225 Difference]: With dead ends: 75 [2020-07-21 22:45:08,391 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:45:08,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:45:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:45:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-07-21 22:45:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:45:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-21 22:45:08,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-07-21 22:45:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:45:08,408 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-21 22:45:08,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:45:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-21 22:45:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 22:45:08,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:45:08,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:45:08,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:08,625 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:45:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:45:08,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times [2020-07-21 22:45:08,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:45:08,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868148969] [2020-07-21 22:45:08,629 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 [2020-07-21 22:45:08,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:45:08,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:45:08,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:45:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:45:08,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:45:08,967 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:45:08,967 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:45:09,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:09,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:45:09 BoogieIcfgContainer [2020-07-21 22:45:09,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:45:09,238 INFO L168 Benchmark]: Toolchain (without parser) took 5232.42 ms. Allocated memory was 136.3 MB in the beginning and 232.3 MB in the end (delta: 95.9 MB). Free memory was 100.5 MB in the beginning and 87.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 109.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,240 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1172.64 ms. Allocated memory was 136.3 MB in the beginning and 203.9 MB in the end (delta: 67.6 MB). Free memory was 100.1 MB in the beginning and 171.9 MB in the end (delta: -71.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,242 INFO L168 Benchmark]: Boogie Preprocessor took 102.75 ms. Allocated memory is still 203.9 MB. Free memory was 171.9 MB in the beginning and 169.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,244 INFO L168 Benchmark]: RCFGBuilder took 1016.83 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 124.9 MB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,245 INFO L168 Benchmark]: TraceAbstraction took 2929.29 ms. Allocated memory was 203.9 MB in the beginning and 232.3 MB in the end (delta: 28.3 MB). Free memory was 124.2 MB in the beginning and 87.2 MB in the end (delta: 37.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:09,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1172.64 ms. Allocated memory was 136.3 MB in the beginning and 203.9 MB in the end (delta: 67.6 MB). Free memory was 100.1 MB in the beginning and 171.9 MB in the end (delta: -71.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.75 ms. Allocated memory is still 203.9 MB. Free memory was 171.9 MB in the beginning and 169.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1016.83 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 124.9 MB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2929.29 ms. Allocated memory was 203.9 MB in the beginning and 232.3 MB in the end (delta: 28.3 MB). Free memory was 124.2 MB in the beginning and 87.2 MB in the end (delta: 37.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1021]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = head [L987] head->data = 0 [L989] SLL* x = head; [L990] int state = 1; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L993] COND FALSE !(__VERIFIER_nondet_int()) [L1014] x->data = state [L1016] EXPR head->next [L1016] x = head->next [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1019] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1] [L1019] COND TRUE x->data != 0 [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] EXPR x->data [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1021] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1021] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 44 SDslu, 61 SDs, 0 SdLazy, 35 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, 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, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 52 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 994 SizeOfPredicates, 4 NumberOfNonLiveVariables, 221 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...