/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/01-begin-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:14:45,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:14:45,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:14:45,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:14:45,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:14:45,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:14:45,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:14:45,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:14:45,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:14:45,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:14:45,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:14:45,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:14:45,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:14:45,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:14:45,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:14:45,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:14:45,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:14:45,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:14:45,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:14:45,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:14:45,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:14:45,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:14:45,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:14:45,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:14:45,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-24 13:14:45,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-24 13:14:45,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-24 13:14:45,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-24 13:14:45,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-24 13:14:45,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-24 13:14:45,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 13:14:45,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 13:14:45,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 13:14:45,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 13:14:45,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 13:14:45,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 13:14:45,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 13:14:45,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 13:14:45,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:14:45,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:14:45,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:14:45,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 13:14:45,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:14:45,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:14:45,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:14:45,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:14:45,586 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:14:45,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:14:45,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:14:45,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:14:45,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:14:45,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:14:45,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:14:45,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:14:45,590 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:14:45,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:14:45,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:14:45,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:14:45,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:14:45,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:14:45,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 13:14:45,894 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 13:14:45,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/01-begin-end.c [2021-03-24 13:14:45,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d28c91b0/b9c2ebd16b0d49798c8202ef0999a8bc/FLAG9db0f1c1f [2021-03-24 13:14:46,494 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 13:14:46,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/01-begin-end.c [2021-03-24 13:14:46,494 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-24 13:14:46,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d28c91b0/b9c2ebd16b0d49798c8202ef0999a8bc/FLAG9db0f1c1f [2021-03-24 13:14:46,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d28c91b0/b9c2ebd16b0d49798c8202ef0999a8bc [2021-03-24 13:14:46,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:14:46,930 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 13:14:46,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 13:14:46,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 13:14:46,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 13:14:46,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:14:46" (1/1) ... [2021-03-24 13:14:46,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50934cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:46, skipping insertion in model container [2021-03-24 13:14:46,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:14:46" (1/1) ... [2021-03-24 13:14:46,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 13:14:46,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 13:14:47,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:14:47,065 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 13:14:47,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:14:47,108 INFO L208 MainTranslator]: Completed translation [2021-03-24 13:14:47,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47 WrapperNode [2021-03-24 13:14:47,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 13:14:47,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:14:47,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:14:47,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:14:47,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:14:47,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:14:47,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:14:47,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:14:47,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (1/1) ... [2021-03-24 13:14:47,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:14:47,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:14:47,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:14:47,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:14:47,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (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 [2021-03-24 13:14:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 13:14:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 13:14:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 13:14:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 13:14:47,213 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 13:14:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:14:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:14:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 13:14:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 13:14:47,216 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:14:47,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:14:47,488 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-24 13:14:47,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:14:47 BoogieIcfgContainer [2021-03-24 13:14:47,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:14:47,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:14:47,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:14:47,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:14:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 01:14:46" (1/3) ... [2021-03-24 13:14:47,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696ab8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:14:47, skipping insertion in model container [2021-03-24 13:14:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:14:47" (2/3) ... [2021-03-24 13:14:47,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696ab8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:14:47, skipping insertion in model container [2021-03-24 13:14:47,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:14:47" (3/3) ... [2021-03-24 13:14:47,496 INFO L111 eAbstractionObserver]: Analyzing ICFG 01-begin-end.c [2021-03-24 13:14:47,517 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:14:47,521 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:14:47,521 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:14:47,563 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,563 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,563 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,563 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,563 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,564 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,564 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,564 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,564 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,564 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,565 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,565 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,566 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,567 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,567 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,567 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:14:47,572 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:14:47,589 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 13:14:47,619 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:14:47,619 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:14:47,619 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:14:47,619 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:14:47,619 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:14:47,619 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:14:47,620 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:14:47,620 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:14:47,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 53 flow [2021-03-24 13:14:47,656 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-24 13:14:47,656 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:14:47,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 1/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2021-03-24 13:14:47,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 53 flow [2021-03-24 13:14:47,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 37 flow [2021-03-24 13:14:47,666 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:14:47,674 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 17 transitions, 37 flow [2021-03-24 13:14:47,676 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 17 transitions, 37 flow [2021-03-24 13:14:47,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 17 transitions, 37 flow [2021-03-24 13:14:47,683 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 13:14:47,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:14:47,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-24 13:14:47,685 INFO L142 LiptonReduction]: Number of co-enabled transitions 32 [2021-03-24 13:14:48,102 INFO L154 LiptonReduction]: Checked pairs total: 40 [2021-03-24 13:14:48,103 INFO L156 LiptonReduction]: Total number of compositions: 11 [2021-03-24 13:14:48,105 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 440 [2021-03-24 13:14:48,111 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-03-24 13:14:48,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:14:48,111 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:14:48,112 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-24 13:14:48,112 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:14:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:14:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 3067577, now seen corresponding path program 1 times [2021-03-24 13:14:48,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:14:48,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442971710] [2021-03-24 13:14:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:14:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:14:48,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:14:48,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:14:48,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:14:48,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:14:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:14:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442971710] [2021-03-24 13:14:48,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:14:48,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 13:14:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737931602] [2021-03-24 13:14:48,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:14:48,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:14:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:14:48,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:14:48,267 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 35 [2021-03-24 13:14:48,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 6 transitions, 15 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:14:48,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:14:48,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 35 [2021-03-24 13:14:48,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:14:48,281 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-24 13:14:48,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:14:48,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 8 events. 1/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 1 based on Foata normal form. 2/10 useless extension candidates. Maximal degree in co-relation 10. Up to 5 conditions per place. [2021-03-24 13:14:48,282 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2021-03-24 13:14:48,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 5 transitions, 19 flow [2021-03-24 13:14:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:14:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:14:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2021-03-24 13:14:48,301 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2021-03-24 13:14:48,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2021-03-24 13:14:48,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2021-03-24 13:14:48,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:14:48,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2021-03-24 13:14:48,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:14:48,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:14:48,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:14:48,317 INFO L185 Difference]: Start difference. First operand has 10 places, 6 transitions, 15 flow. Second operand 3 states and 67 transitions. [2021-03-24 13:14:48,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 5 transitions, 19 flow [2021-03-24 13:14:48,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 5 transitions, 18 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:14:48,320 INFO L241 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2021-03-24 13:14:48,323 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2021-03-24 13:14:48,324 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, 0 predicate places. [2021-03-24 13:14:48,324 INFO L480 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2021-03-24 13:14:48,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:14:48,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:14:48,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:14:48 BasicIcfg [2021-03-24 13:14:48,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:14:48,331 INFO L168 Benchmark]: Toolchain (without parser) took 1399.76 ms. Allocated memory was 255.9 MB in the beginning and 346.0 MB in the end (delta: 90.2 MB). Free memory was 233.5 MB in the beginning and 326.5 MB in the end (delta: -93.0 MB). Peak memory consumption was 55.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:14:48,332 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:14:48,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.50 ms. Allocated memory was 255.9 MB in the beginning and 346.0 MB in the end (delta: 90.2 MB). Free memory was 233.5 MB in the beginning and 330.2 MB in the end (delta: -96.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:14:48,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.50 ms. Allocated memory is still 346.0 MB. Free memory was 330.2 MB in the beginning and 328.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:14:48,334 INFO L168 Benchmark]: Boogie Preprocessor took 13.25 ms. Allocated memory is still 346.0 MB. Free memory was 328.8 MB in the beginning and 327.9 MB in the end (delta: 912.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:14:48,335 INFO L168 Benchmark]: RCFGBuilder took 338.31 ms. Allocated memory is still 346.0 MB. Free memory was 327.8 MB in the beginning and 316.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:14:48,337 INFO L168 Benchmark]: TraceAbstraction took 837.75 ms. Allocated memory is still 346.0 MB. Free memory was 315.7 MB in the beginning and 326.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.0 GB. [2021-03-24 13:14:48,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 176.50 ms. Allocated memory was 255.9 MB in the beginning and 346.0 MB in the end (delta: 90.2 MB). Free memory was 233.5 MB in the beginning and 330.2 MB in the end (delta: -96.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.50 ms. Allocated memory is still 346.0 MB. Free memory was 330.2 MB in the beginning and 328.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.25 ms. Allocated memory is still 346.0 MB. Free memory was 328.8 MB in the beginning and 327.9 MB in the end (delta: 912.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 338.31 ms. Allocated memory is still 346.0 MB. Free memory was 327.8 MB in the beginning and 316.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 837.75 ms. Allocated memory is still 346.0 MB. Free memory was 315.7 MB in the beginning and 326.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 426.7ms, 21 PlacesBefore, 10 PlacesAfterwards, 17 TransitionsBefore, 6 TransitionsAfterwards, 32 CoEnabledTransitionPairs, 5 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 40 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 35, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 22, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 22, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 35, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 22, unknown conditional: 0, unknown unconditional: 22] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 2, Positive conditional cache size: 0, Positive unconditional cache size: 2, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - PositiveResult [Line: 33]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 712.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 62.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 488.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.1ms SsaConstructionTime, 16.5ms SatisfiabilityAnalysisTime, 45.4ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...