/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/dll-optional-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:23:15,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:23:15,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:23:15,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:23:15,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:23:15,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:23:15,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:23:15,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:23:15,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:23:15,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:23:15,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:23:15,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:23:15,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:23:15,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:23:15,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:23:15,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:23:15,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:23:15,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:23:15,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:23:15,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:23:15,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:23:15,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:23:15,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:23:15,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:23:15,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:23:15,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:23:15,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:23:15,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:23:15,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:23:15,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:23:15,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:23:15,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:23:15,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:23:15,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:23:15,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:23:15,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:23:15,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:23:15,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:23:15,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:23:15,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:23:15,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:23:15,589 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 11:23:15,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:23:15,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:23:15,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:23:15,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:23:15,617 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:23:15,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:23:15,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:23:15,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:23:15,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:23:15,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:23:15,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:23:15,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:23:15,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:23:15,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:23:15,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:23:15,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:23:15,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:23:15,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:23:15,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:23:15,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:23:15,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:23:15,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:23:15,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:23:15,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:23:15,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:23:15,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:23:15,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:15,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:23:15,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:23:15,624 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 11:23:15,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:23:15,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:23:15,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:23:15,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:23:15,972 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:23:15,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-2.i [2020-07-21 11:23:16,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed479ecb8/4595c8e3c4044159b733577c683f341f/FLAG20bcf37b1 [2020-07-21 11:23:16,563 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:23:16,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-optional-2.i [2020-07-21 11:23:16,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed479ecb8/4595c8e3c4044159b733577c683f341f/FLAG20bcf37b1 [2020-07-21 11:23:16,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed479ecb8/4595c8e3c4044159b733577c683f341f [2020-07-21 11:23:16,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:23:16,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:23:16,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:16,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:23:16,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:23:16,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:16" (1/1) ... [2020-07-21 11:23:16,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce92148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:16, skipping insertion in model container [2020-07-21 11:23:16,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:16" (1/1) ... [2020-07-21 11:23:16,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:23:17,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:23:17,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:17,426 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:23:17,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:17,577 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:23:17,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17 WrapperNode [2020-07-21 11:23:17,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:17,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:23:17,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:23:17,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:23:17,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (1/1) ... [2020-07-21 11:23:17,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:23:17,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:23:17,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:23:17,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:23:17,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (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 11:23:17,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:23:17,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:23:17,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:23:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:23:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:23:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:23:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:23:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:23:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:23:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:23:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:23:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:23:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:23:17,724 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:23:17,725 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:23:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:23:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:23:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:23:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:23:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:23:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:23:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:23:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:23:18,321 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:23:18,321 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-21 11:23:18,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:18 BoogieIcfgContainer [2020-07-21 11:23:18,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:23:18,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:23:18,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:23:18,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:23:18,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:16" (1/3) ... [2020-07-21 11:23:18,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad5bb16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:18, skipping insertion in model container [2020-07-21 11:23:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:17" (2/3) ... [2020-07-21 11:23:18,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad5bb16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:18, skipping insertion in model container [2020-07-21 11:23:18,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:18" (3/3) ... [2020-07-21 11:23:18,342 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2020-07-21 11:23:18,354 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:23:18,366 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:23:18,382 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:23:18,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:23:18,409 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:23:18,409 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:23:18,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:23:18,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:23:18,413 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:23:18,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:23:18,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:23:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-21 11:23:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:23:18,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:18,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:18,454 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1877010449, now seen corresponding path program 1 times [2020-07-21 11:23:18,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:18,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599189677] [2020-07-21 11:23:18,467 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 11:23:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:23:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:18,736 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 11:23:18,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:18,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599189677] [2020-07-21 11:23:18,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:18,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:23:18,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272183387] [2020-07-21 11:23:18,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:23:18,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:23:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:23:18,767 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-07-21 11:23:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:18,804 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2020-07-21 11:23:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:23:18,805 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 11:23:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:18,817 INFO L225 Difference]: With dead ends: 49 [2020-07-21 11:23:18,817 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 11:23:18,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 11:23:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 11:23:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 11:23:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 11:23:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-07-21 11:23:18,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2020-07-21 11:23:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:18,863 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-07-21 11:23:18,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:23:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-07-21 11:23:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:23:18,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:18,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:19,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:19,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1827708973, now seen corresponding path program 1 times [2020-07-21 11:23:19,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:19,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086422899] [2020-07-21 11:23:19,082 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 11:23:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:19,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:19,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:19,300 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:23:19,300 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:23:19,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:19,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:19 BoogieIcfgContainer [2020-07-21 11:23:19,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:23:19,542 INFO L168 Benchmark]: Toolchain (without parser) took 2610.12 ms. Allocated memory was 138.9 MB in the beginning and 237.0 MB in the end (delta: 98.0 MB). Free memory was 102.4 MB in the beginning and 160.4 MB in the end (delta: -58.0 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:19,544 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 11:23:19,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.80 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.0 MB in the end (delta: -68.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:19,545 INFO L168 Benchmark]: Boogie Preprocessor took 67.50 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 167.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:19,546 INFO L168 Benchmark]: RCFGBuilder took 681.10 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 120.6 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:19,547 INFO L168 Benchmark]: TraceAbstraction took 1209.32 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 119.9 MB in the beginning and 160.4 MB in the end (delta: -40.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:23:19,551 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 645.80 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.0 MB in the end (delta: -68.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.50 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 167.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 681.10 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 120.6 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1209.32 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 119.9 MB in the beginning and 160.4 MB in the end (delta: -40.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 998]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = ((void*)0) [L988] head->prev = ((void*)0) [L989] COND TRUE __VERIFIER_nondet_int() [L989] head->data = 2 [L989] head->opt = malloc(sizeof(SLL)) [L989] EXPR head->opt [L989] head->opt->next = ((void*)0) [L990] SLL* x = head; VAL [head={8366:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={8366:0}, x={8366:0}] [L992] COND FALSE !(__VERIFIER_nondet_int()) [L995] x = head VAL [head={8366:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={8366:0}, x={8366:0}] [L996] COND TRUE x != ((void*)0) VAL [head={8366:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={8366:0}, x={8366:0}] [L998] EXPR x->data [L998] EXPR x->data == 2 && x->opt == x [L998] EXPR x->opt [L998] EXPR x->data == 2 && x->opt == x VAL [head={8366:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={8366:0}, x={8366:0}, x->data=2, x->data == 2 && x->opt == x=0, x->opt={-1:0}] [L998] COND TRUE !(x->data == 2 && x->opt == x) [L998] __VERIFIER_error() VAL [head={8366:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={8366:0}, x={8366:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 86 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...