java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0270b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-11 16:06:46,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-11 16:06:46,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-11 16:06:46,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-11 16:06:46,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-11 16:06:46,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-11 16:06:46,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-11 16:06:46,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-11 16:06:46,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-11 16:06:46,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-11 16:06:46,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-11 16:06:46,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-11 16:06:46,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-11 16:06:46,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-11 16:06:46,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-11 16:06:46,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-11 16:06:46,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-11 16:06:46,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-11 16:06:46,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-11 16:06:46,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-11 16:06:46,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-11 16:06:46,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-11 16:06:46,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-11 16:06:46,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-11 16:06:46,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-11 16:06:46,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-11 16:06:46,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-11 16:06:46,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-11 16:06:46,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-11 16:06:46,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-11 16:06:46,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-11 16:06:46,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-11 16:06:46,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-11 16:06:46,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-11 16:06:46,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-11 16:06:46,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-11 16:06:46,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-11 16:06:46,398 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-11 16:06:46,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-11 16:06:46,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-11 16:06:46,399 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-11 16:06:46,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-11 16:06:46,400 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-11 16:06:46,400 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-11 16:06:46,401 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-11 16:06:46,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-11 16:06:46,401 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-11 16:06:46,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-11 16:06:46,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-11 16:06:46,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-11 16:06:46,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-11 16:06:46,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-11 16:06:46,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-11 16:06:46,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-11 16:06:46,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-11 16:06:46,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-11 16:06:46,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-11 16:06:46,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-11 16:06:46,406 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-11 16:06:46,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-11 16:06:46,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-11 16:06:46,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-11 16:06:46,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-11 16:06:46,407 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-11 16:06:46,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-11 16:06:46,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-11 16:06:46,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-11 16:06:46,455 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-11 16:06:46,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-11 16:06:46,471 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-11 16:06:46,472 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-11 16:06:46,472 INFO L275 PluginConnector]: CDTParser initialized [2019-09-11 16:06:46,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0270b.c [2019-09-11 16:06:46,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8d90673/e088d837cbfd43be9f6d83dffb209778/FLAG107d918f3 [2019-09-11 16:06:47,003 INFO L306 CDTParser]: Found 1 translation units. [2019-09-11 16:06:47,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0270b.c [2019-09-11 16:06:47,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8d90673/e088d837cbfd43be9f6d83dffb209778/FLAG107d918f3 [2019-09-11 16:06:47,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8d90673/e088d837cbfd43be9f6d83dffb209778 [2019-09-11 16:06:47,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-11 16:06:47,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-11 16:06:47,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-11 16:06:47,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-11 16:06:47,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-11 16:06:47,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:47,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4b40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47, skipping insertion in model container [2019-09-11 16:06:47,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:47,414 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-11 16:06:47,463 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-11 16:06:47,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-11 16:06:47,865 INFO L188 MainTranslator]: Completed pre-run [2019-09-11 16:06:47,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-11 16:06:47,992 INFO L192 MainTranslator]: Completed translation [2019-09-11 16:06:47,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47 WrapperNode [2019-09-11 16:06:47,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-11 16:06:47,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-11 16:06:47,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-11 16:06:47,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-11 16:06:48,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (1/1) ... [2019-09-11 16:06:48,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-11 16:06:48,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-11 16:06:48,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-11 16:06:48,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-11 16:06:48,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:06:47" (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 [2019-09-11 16:06:48,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_asinf [2019-09-11 16:06:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-11 16:06:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-11 16:06:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_asinf [2019-09-11 16:06:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-11 16:06:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-11 16:06:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-11 16:06:48,810 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-11 16:06:48,811 INFO L283 CfgBuilder]: Removed 18 assume(true) statements. [2019-09-11 16:06:48,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:06:48 BoogieIcfgContainer [2019-09-11 16:06:48,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-11 16:06:48,813 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-09-11 16:06:48,813 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-09-11 16:06:48,814 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-09-11 16:06:48,815 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:06:48" (1/1) ... [2019-09-11 16:06:48,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-11 16:06:48,963 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-11 16:06:48,968 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 0. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 75 variables. [2019-09-11 16:06:48,969 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-09-11 16:06:48,971 INFO L168 Benchmark]: Toolchain (without parser) took 1580.11 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 89.4 MB in the beginning and 128.2 MB in the end (delta: -38.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,972 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.22 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 89.2 MB in the beginning and 173.2 MB in the end (delta: -84.1 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,974 INFO L168 Benchmark]: Boogie Preprocessor took 60.10 ms. Allocated memory is still 200.3 MB. Free memory was 173.2 MB in the beginning and 170.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,976 INFO L168 Benchmark]: RCFGBuilder took 758.21 ms. Allocated memory is still 200.3 MB. Free memory was 170.9 MB in the beginning and 135.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,976 INFO L168 Benchmark]: Abstract Interpretation took 155.63 ms. Allocated memory is still 200.3 MB. Free memory was 135.0 MB in the beginning and 128.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2019-09-11 16:06:48,981 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 597.22 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 89.2 MB in the beginning and 173.2 MB in the end (delta: -84.1 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.10 ms. Allocated memory is still 200.3 MB. Free memory was 173.2 MB in the beginning and 170.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 758.21 ms. Allocated memory is still 200.3 MB. Free memory was 170.9 MB in the beginning and 135.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 155.63 ms. Allocated memory is still 200.3 MB. Free memory was 135.0 MB in the beginning and 128.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - PositiveResult [Line: 198]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location RESULT: Ultimate proved your program to be correct! Received shutdown request...