/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:46:38,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:46:38,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:46:38,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:46:38,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:46:38,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:46:38,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:46:38,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:46:38,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:46:38,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:46:38,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:46:38,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:46:38,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:46:38,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:46:38,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:46:38,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:46:38,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:46:38,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:46:38,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:46:38,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:46:38,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:46:38,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:46:38,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:46:38,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:46:38,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:46:38,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:46:38,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:46:38,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:46:38,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:46:38,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:46:38,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:46:38,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:46:38,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:46:38,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:46:38,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:46:38,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:46:38,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:46:38,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:46:38,353 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:46:38,353 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:46:38,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:46:38,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:46:38,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:46:38,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:46:38,592 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:46:38,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c [2021-05-02 20:46:38,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5666458c6/a351064327384ff488fd08711e7a80c0/FLAG0019ba062 [2021-05-02 20:46:39,001 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:46:39,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c [2021-05-02 20:46:39,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5666458c6/a351064327384ff488fd08711e7a80c0/FLAG0019ba062 [2021-05-02 20:46:39,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5666458c6/a351064327384ff488fd08711e7a80c0 [2021-05-02 20:46:39,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:46:39,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:46:39,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:46:39,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:46:39,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:46:39,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b583426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39, skipping insertion in model container [2021-05-02 20:46:39,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:46:39,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:46:39,451 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c[524,537] [2021-05-02 20:46:39,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:46:39,464 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:46:39,495 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c[524,537] [2021-05-02 20:46:39,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:46:39,512 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:46:39,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39 WrapperNode [2021-05-02 20:46:39,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:46:39,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:46:39,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:46:39,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:46:39,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:46:39,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:46:39,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:46:39,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:46:39,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (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 [2021-05-02 20:46:39,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:46:39,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:46:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:46:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:46:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:46:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:46:39,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:46:39,764 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:46:39,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:46:39 BoogieIcfgContainer [2021-05-02 20:46:39,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:46:39,766 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:46:39,766 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:46:39,766 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:46:39,768 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:46:39" (1/1) ... [2021-05-02 20:46:39,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:46:39 BasicIcfg [2021-05-02 20:46:39,779 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:46:39,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:46:39,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:46:39,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:46:39,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:46:39" (1/4) ... [2021-05-02 20:46:39,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3393de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:46:39, skipping insertion in model container [2021-05-02 20:46:39,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:46:39" (2/4) ... [2021-05-02 20:46:39,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3393de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:46:39, skipping insertion in model container [2021-05-02 20:46:39,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:46:39" (3/4) ... [2021-05-02 20:46:39,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3393de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:46:39, skipping insertion in model container [2021-05-02 20:46:39,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:46:39" (4/4) ... [2021-05-02 20:46:39,783 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound2.cJordan [2021-05-02 20:46:39,786 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:46:39,789 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:46:39,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:46:39,831 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:46:39,831 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:46:39,831 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:46:39,831 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:46:39,831 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:46:39,831 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:46:39,831 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:46:39,832 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:46:39,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:46:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:46:39,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:39,860 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:39,860 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:46:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:39,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263501772] [2021-05-02 20:46:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:46:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:46:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:46:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:46:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:46:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:46:40,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263501772] [2021-05-02 20:46:40,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263501772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:46:40,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:46:40,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:46:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459699703] [2021-05-02 20:46:40,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:46:40,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:46:40,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:46:40,120 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:46:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:40,185 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:46:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:46:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:46:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:40,191 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:46:40,191 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:46:40,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:46:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:46:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:46:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:46:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:46:40,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:46:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:40,219 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:46:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:46:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:46:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:46:40,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:40,221 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:40,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:46:40,221 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:40,222 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:46:40,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:40,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512155289] [2021-05-02 20:46:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:40,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:40,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151759640] [2021-05-02 20:46:40,247 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:46:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:40,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:40,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:59,286 WARN L205 SmtUtils]: Spent 18.74 s on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-02 20:46:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:59,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:46:59,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:59,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512155289] [2021-05-02 20:46:59,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151759640] [2021-05-02 20:46:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151759640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:46:59,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:46:59,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:46:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242345532] [2021-05-02 20:46:59,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:46:59,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:46:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:46:59,417 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:08,320 WARN L205 SmtUtils]: Spent 8.85 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:47:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:08,349 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 20:47:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:47:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 20:47:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:08,350 INFO L225 Difference]: With dead ends: 24 [2021-05-02 20:47:08,350 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:47:08,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 27716.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:47:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:47:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:47:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-05-02 20:47:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:47:08,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-05-02 20:47:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:08,351 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:47:08,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:47:08,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:47:08,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:47:08,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:47:08 BasicIcfg [2021-05-02 20:47:08,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:47:08,556 INFO L168 Benchmark]: Toolchain (without parser) took 29201.93 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 159.0 MB in the end (delta: 4.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,556 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 179.4 MB in the beginning and 179.2 MB in the end (delta: 216.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:47:08,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.56 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 180.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,556 INFO L168 Benchmark]: Boogie Preprocessor took 16.89 ms. Allocated memory is still 198.2 MB. Free memory was 180.9 MB in the beginning and 179.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,556 INFO L168 Benchmark]: RCFGBuilder took 235.12 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,557 INFO L168 Benchmark]: IcfgTransformer took 13.32 ms. Allocated memory is still 198.2 MB. Free memory was 163.6 MB in the beginning and 162.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,557 INFO L168 Benchmark]: TraceAbstraction took 28775.57 ms. Allocated memory is still 198.2 MB. Free memory was 162.0 MB in the beginning and 159.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:08,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 179.4 MB in the beginning and 179.2 MB in the end (delta: 216.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 157.56 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 180.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.89 ms. Allocated memory is still 198.2 MB. Free memory was 180.9 MB in the beginning and 179.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 235.12 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.32 ms. Allocated memory is still 198.2 MB. Free memory was 163.6 MB in the beginning and 162.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28775.57 ms. Allocated memory is still 198.2 MB. Free memory was 162.0 MB in the beginning and 159.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28723.1ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 23.3ms, AutomataDifference: 9015.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47 SDtfs, 37 SDslu, 84 SDs, 0 SdLazy, 78 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 27758.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.7ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.8ms SsaConstructionTime, 66.7ms SatisfiabilityAnalysisTime, 19230.7ms InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 302 SizeOfPredicates, 6 NumberOfNonLiveVariables, 133 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 48/48 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...