/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:53:00,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:53:00,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:53:00,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:53:00,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:53:00,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:53:00,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:53:00,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:53:00,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:53:00,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:53:00,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:53:00,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:53:00,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:53:00,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:53:00,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:53:00,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:53:00,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:53:00,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:53:00,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:53:00,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:53:00,395 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 [2021-02-23 13:53:00,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:53:00,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:53:00,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:53:00,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:53:00,428 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:53:00,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:53:00,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:53:00,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:53:00,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:53:00,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:53:00,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:53:00,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:53:00,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:53:00,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:53:00,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:53:00,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:53:00,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:53:00,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:53:00,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:53:00,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:53:00,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:53:00,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:53:00,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:53:00,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:53:00,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:53:00,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:53:00,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:53:00,808 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:53:00,809 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:53:00,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2021-02-23 13:53:00,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40c8c7ef/3fe40c3024e5478a9b605040a571b3a3/FLAG5416dc65f [2021-02-23 13:53:01,572 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:53:01,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2021-02-23 13:53:01,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40c8c7ef/3fe40c3024e5478a9b605040a571b3a3/FLAG5416dc65f [2021-02-23 13:53:01,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40c8c7ef/3fe40c3024e5478a9b605040a571b3a3 [2021-02-23 13:53:01,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:53:01,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:53:01,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:53:01,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:53:01,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:53:01,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:53:01" (1/1) ... [2021-02-23 13:53:01,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea21373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:01, skipping insertion in model container [2021-02-23 13:53:01,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:53:01" (1/1) ... [2021-02-23 13:53:01,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:53:01,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:53:02,120 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c[405,418] [2021-02-23 13:53:02,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:53:02,148 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:53:02,163 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c[405,418] [2021-02-23 13:53:02,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:53:02,191 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:53:02,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02 WrapperNode [2021-02-23 13:53:02,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:53:02,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:53:02,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:53:02,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:53:02,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (1/1) ... [2021-02-23 13:53:02,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:53:02,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:53:02,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:53:02,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:53:02,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (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 [2021-02-23 13:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:53:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:53:02,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 13:53:02,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 13:53:02,407 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-02-23 13:53:02,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:53:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:53:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:53:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:53:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:53:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 13:53:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 13:53:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 13:53:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:53:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-02-23 13:53:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:53:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:53:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:53:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:53:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:53:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:53:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:53:02,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:53:02,931 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:53:02,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:53:02 BoogieIcfgContainer [2021-02-23 13:53:02,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:53:02,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:53:02,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:53:02,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:53:02,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:53:01" (1/3) ... [2021-02-23 13:53:02,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673f271e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:53:02, skipping insertion in model container [2021-02-23 13:53:02,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:53:02" (2/3) ... [2021-02-23 13:53:02,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673f271e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:53:02, skipping insertion in model container [2021-02-23 13:53:02,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:53:02" (3/3) ... [2021-02-23 13:53:02,945 INFO L111 eAbstractionObserver]: Analyzing ICFG trex04.c [2021-02-23 13:53:02,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:53:02,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:53:02,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:53:03,009 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:53:03,009 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:53:03,009 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:53:03,009 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:53:03,010 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:53:03,010 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:53:03,010 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:53:03,010 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:53:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-23 13:53:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:53:03,035 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:53:03,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:53:03,036 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:53:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:53:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1661240883, now seen corresponding path program 1 times [2021-02-23 13:53:03,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:53:03,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767176744] [2021-02-23 13:53:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:53:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:53:03,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:53:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:53:03,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:53:03,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767176744] [2021-02-23 13:53:03,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:53:03,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:53:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055808344] [2021-02-23 13:53:03,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:53:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:53:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:53:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:53:03,377 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2021-02-23 13:53:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:53:03,481 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-02-23 13:53:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:53:03,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-02-23 13:53:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:53:03,492 INFO L225 Difference]: With dead ends: 42 [2021-02-23 13:53:03,493 INFO L226 Difference]: Without dead ends: 25 [2021-02-23 13:53:03,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:53:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-23 13:53:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-23 13:53:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 13:53:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-02-23 13:53:03,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2021-02-23 13:53:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:53:03,544 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-02-23 13:53:03,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:53:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-02-23 13:53:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:53:03,546 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:53:03,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:53:03,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:53:03,547 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:53:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:53:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1664934967, now seen corresponding path program 1 times [2021-02-23 13:53:03,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:53:03,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561838571] [2021-02-23 13:53:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:53:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:53:03,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:53:03,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:53:03,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:53:03,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:53:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:53:03,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:53:03,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:53:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:53:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561838571] [2021-02-23 13:53:03,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:53:03,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:53:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948093108] [2021-02-23 13:53:03,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:53:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:53:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:53:03,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:53:03,752 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 6 states. [2021-02-23 13:53:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:53:03,980 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-02-23 13:53:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:53:03,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-02-23 13:53:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:53:03,982 INFO L225 Difference]: With dead ends: 25 [2021-02-23 13:53:03,982 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:53:03,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:53:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:53:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:53:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:53:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:53:03,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-02-23 13:53:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:53:03,985 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:53:03,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:53:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:53:03,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:53:03,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:53:03,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:53:04,157 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:53:04,158 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:53:04,158 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:53:04,158 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:53:04,159 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:53:04,159 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:53:04,159 INFO L189 CegarLoopUtils]: For program point fooEXIT(lines 18 25) no Hoare annotation was computed. [2021-02-23 13:53:04,159 INFO L189 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-02-23 13:53:04,159 INFO L189 CegarLoopUtils]: For program point L23-1(lines 18 25) no Hoare annotation was computed. [2021-02-23 13:53:04,159 INFO L192 CegarLoopUtils]: At program point fooENTRY(lines 18 25) the Hoare annotation is: true [2021-02-23 13:53:04,160 INFO L189 CegarLoopUtils]: For program point L22-2(lines 19 25) no Hoare annotation was computed. [2021-02-23 13:53:04,160 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:53:04,160 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:53:04,160 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:53:04,160 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point L35-2(line 35) no Hoare annotation was computed. [2021-02-23 13:53:04,161 INFO L189 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-02-23 13:53:04,162 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 27 48) no Hoare annotation was computed. [2021-02-23 13:53:04,162 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 27 48) no Hoare annotation was computed. [2021-02-23 13:53:04,162 INFO L189 CegarLoopUtils]: For program point L42-1(lines 28 48) no Hoare annotation was computed. [2021-02-23 13:53:04,162 INFO L185 CegarLoopUtils]: At program point L42-2(lines 42 45) the Hoare annotation is: (<= main_~x~0 0) [2021-02-23 13:53:04,162 INFO L189 CegarLoopUtils]: For program point L34(line 34) no Hoare annotation was computed. [2021-02-23 13:53:04,162 INFO L189 CegarLoopUtils]: For program point L34-2(lines 28 48) no Hoare annotation was computed. [2021-02-23 13:53:04,163 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 27 48) the Hoare annotation is: true [2021-02-23 13:53:04,163 INFO L189 CegarLoopUtils]: For program point L39(line 39) no Hoare annotation was computed. [2021-02-23 13:53:04,163 INFO L192 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: true [2021-02-23 13:53:04,163 INFO L189 CegarLoopUtils]: For program point L39-3(lines 28 48) no Hoare annotation was computed. [2021-02-23 13:53:04,163 INFO L192 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-02-23 13:53:04,164 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2021-02-23 13:53:04,164 INFO L189 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-02-23 13:53:04,164 INFO L189 CegarLoopUtils]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-02-23 13:53:04,164 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 14) no Hoare annotation was computed. [2021-02-23 13:53:04,164 INFO L189 CegarLoopUtils]: For program point L10-2(lines 9 14) no Hoare annotation was computed. [2021-02-23 13:53:04,165 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-02-23 13:53:04,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:53:04 BoogieIcfgContainer [2021-02-23 13:53:04,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:53:04,173 INFO L168 Benchmark]: Toolchain (without parser) took 2245.70 ms. Allocated memory is still 163.6 MB. Free memory was 138.7 MB in the beginning and 60.5 MB in the end (delta: 78.2 MB). Peak memory consumption was 78.8 MB. Max. memory is 8.0 GB. [2021-02-23 13:53:04,174 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:53:04,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.65 ms. Allocated memory is still 163.6 MB. Free memory was 137.5 MB in the beginning and 127.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:53:04,175 INFO L168 Benchmark]: Boogie Preprocessor took 77.20 ms. Allocated memory is still 163.6 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:53:04,176 INFO L168 Benchmark]: RCFGBuilder took 663.14 ms. Allocated memory is still 163.6 MB. Free memory was 125.7 MB in the beginning and 143.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:53:04,177 INFO L168 Benchmark]: TraceAbstraction took 1233.60 ms. Allocated memory is still 163.6 MB. Free memory was 142.8 MB in the beginning and 60.5 MB in the end (delta: 82.3 MB). Peak memory consumption was 81.8 MB. Max. memory is 8.0 GB. [2021-02-23 13:53:04,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.65 ms. Allocated memory is still 163.6 MB. Free memory was 137.5 MB in the beginning and 127.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.20 ms. Allocated memory is still 163.6 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.14 ms. Allocated memory is still 163.6 MB. Free memory was 125.7 MB in the beginning and 143.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1233.60 ms. Allocated memory is still 163.6 MB. Free memory was 142.8 MB in the beginning and 60.5 MB in the end (delta: 82.3 MB). Peak memory consumption was 81.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 47 SDslu, 25 SDs, 0 SdLazy, 77 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 12 NumberOfFragments, 41 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 189 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...