/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 NOT_INCREMENTALLY -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 11:23:28,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:23:28,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:23:28,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:23:28,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:23:28,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:23:28,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:23:28,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:23:28,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:23:28,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:23:28,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:23:28,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:23:28,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:23:28,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:23:28,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:23:28,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:23:28,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:23:28,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:23:28,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:23:28,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:23:28,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:23:28,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:23:28,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:23:28,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:23:28,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:23:28,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:23:28,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:23:28,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:23:28,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:23:28,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:23:28,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:23:28,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:23:28,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:23:28,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:23:28,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:23:28,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:23:28,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:23:28,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:23:28,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:23:28,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:23:28,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:23:28,342 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 11:23:28,357 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:23:28,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:23:28,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:23:28,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:23:28,359 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:23:28,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:23:28,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:23:28,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:23:28,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:23:28,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:23:28,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:23:28,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:23:28,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:23:28,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:23:28,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:23:28,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:23:28,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:23:28,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:23:28,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:23:28,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:23:28,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:23:28,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:23:28,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:23:28,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:23:28,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:23:28,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:23:28,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:28,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:23:28,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:23:28,364 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 -> NOT_INCREMENTALLY [2020-07-21 11:23:28,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:23:28,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:23:28,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:23:28,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:23:28,687 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:23:28,689 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 11:23:28,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f68ef0b/4a47105fab18472d8edaff928484b3ef/FLAG7219f60ad [2020-07-21 11:23:29,365 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:23:29,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 11:23:29,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f68ef0b/4a47105fab18472d8edaff928484b3ef/FLAG7219f60ad [2020-07-21 11:23:29,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f68ef0b/4a47105fab18472d8edaff928484b3ef [2020-07-21 11:23:29,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:23:29,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:23:29,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:29,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:23:29,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:23:29,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6555ff40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29, skipping insertion in model container [2020-07-21 11:23:29,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:23:29,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:23:30,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:30,211 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:23:30,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:30,326 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:23:30,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30 WrapperNode [2020-07-21 11:23:30,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:30,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:23:30,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:23:30,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:23:30,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (1/1) ... [2020-07-21 11:23:30,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:23:30,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:23:30,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:23:30,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:23:30,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (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 11:23:30,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:23:30,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:23:30,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:23:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:23:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:23:30,449 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:23:30,449 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:23:30,449 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:23:30,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:23:30,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:23:30,451 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:23:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:23:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:23:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:23:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:23:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:23:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:23:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:23:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:23:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:23:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:23:30,972 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:23:30,972 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-21 11:23:30,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:30 BoogieIcfgContainer [2020-07-21 11:23:30,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:23:30,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:23:30,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:23:30,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:23:30,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:29" (1/3) ... [2020-07-21 11:23:30,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac26794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:30, skipping insertion in model container [2020-07-21 11:23:30,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:30" (2/3) ... [2020-07-21 11:23:30,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac26794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:30, skipping insertion in model container [2020-07-21 11:23:30,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:30" (3/3) ... [2020-07-21 11:23:30,987 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-07-21 11:23:30,998 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:23:31,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 11:23:31,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 11:23:31,048 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:23:31,048 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:23:31,048 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:23:31,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:23:31,049 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:23:31,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:23:31,049 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:23:31,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:23:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 11:23:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 11:23:31,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:31,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:31,080 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times [2020-07-21 11:23:31,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:31,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736990500] [2020-07-21 11:23:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:23:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:23:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:31,282 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 11:23:31,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:31,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736990500] [2020-07-21 11:23:31,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:31,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:23:31,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983756608] [2020-07-21 11:23:31,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:23:31,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:23:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:23:31,311 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-21 11:23:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:31,357 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-07-21 11:23:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:23:31,359 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 11:23:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:31,370 INFO L225 Difference]: With dead ends: 70 [2020-07-21 11:23:31,370 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 11:23:31,374 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 11:23:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 11:23:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 11:23:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 11:23:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-21 11:23:31,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2020-07-21 11:23:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:31,417 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-21 11:23:31,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:23:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-21 11:23:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:23:31,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:31,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:31,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:31,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1199756337, now seen corresponding path program 1 times [2020-07-21 11:23:31,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:31,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899487143] [2020-07-21 11:23:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:23:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:23:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:31,810 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 11:23:31,811 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,828 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,828 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:18 [2020-07-21 11:23:31,878 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 11:23:31,889 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,896 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 11:23:31,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:31,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:31,910 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 11 treesize of output 7 [2020-07-21 11:23:31,911 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,913 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,914 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,921 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,923 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,923 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:41, output treesize:4 [2020-07-21 11:23:31,930 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 11:23:31,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:31,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899487143] [2020-07-21 11:23:31,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:31,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:23:31,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849731214] [2020-07-21 11:23:31,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:23:31,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:23:31,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:23:31,934 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-07-21 11:23:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:32,003 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-07-21 11:23:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:23:32,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 11:23:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:32,005 INFO L225 Difference]: With dead ends: 46 [2020-07-21 11:23:32,005 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 11:23:32,006 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 11:23:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 11:23:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-07-21 11:23:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:23:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 11:23:32,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2020-07-21 11:23:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:32,015 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 11:23:32,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:23:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 11:23:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:23:32,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:32,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:32,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:32,230 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times [2020-07-21 11:23:32,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:32,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532365910] [2020-07-21 11:23:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:23:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:23:32,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:32,365 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 11:23:32,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:32,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532365910] [2020-07-21 11:23:32,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:32,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:32,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041326401] [2020-07-21 11:23:32,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:32,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:32,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:32,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:32,368 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2020-07-21 11:23:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:32,406 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-07-21 11:23:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:32,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 11:23:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:32,410 INFO L225 Difference]: With dead ends: 75 [2020-07-21 11:23:32,410 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 11:23:32,411 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 11:23:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 11:23:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-07-21 11:23:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:23:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-21 11:23:32,420 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-07-21 11:23:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:32,420 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-21 11:23:32,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-21 11:23:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:23:32,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:32,422 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 11:23:32,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:32,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times [2020-07-21 11:23:32,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:32,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961837971] [2020-07-21 11:23:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:23:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:32,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:32,767 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:32,794 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:23:32,794 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:23:33,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:33,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:33 BoogieIcfgContainer [2020-07-21 11:23:33,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:23:33,046 INFO L168 Benchmark]: Toolchain (without parser) took 3338.71 ms. Allocated memory was 143.7 MB in the beginning and 231.7 MB in the end (delta: 88.1 MB). Free memory was 100.0 MB in the beginning and 86.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 101.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,046 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 143.7 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:23:33,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.64 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 99.6 MB in the beginning and 167.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,048 INFO L168 Benchmark]: Boogie Preprocessor took 60.86 ms. Allocated memory is still 201.3 MB. Free memory was 167.7 MB in the beginning and 164.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,049 INFO L168 Benchmark]: RCFGBuilder took 588.76 ms. Allocated memory is still 201.3 MB. Free memory was 164.7 MB in the beginning and 120.2 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,050 INFO L168 Benchmark]: TraceAbstraction took 2065.17 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 120.2 MB in the beginning and 86.8 MB in the end (delta: 33.3 MB). Peak memory consumption was 63.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 143.7 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 614.64 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 99.6 MB in the beginning and 167.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.86 ms. Allocated memory is still 201.3 MB. Free memory was 167.7 MB in the beginning and 164.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.76 ms. Allocated memory is still 201.3 MB. Free memory was 164.7 MB in the beginning and 120.2 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2065.17 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 120.2 MB in the beginning and 86.8 MB in the end (delta: 33.3 MB). Peak memory consumption was 63.7 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: 1.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 994 SizeOfPredicates, 4 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 16 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...