./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f912e141cfd9116e6012d7a1a78045cf8af895a ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:37:34,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:37:34,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:37:34,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:37:34,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:37:34,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:37:34,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:37:34,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:37:34,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:37:34,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:37:34,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:37:34,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:37:34,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:37:34,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:37:34,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:37:34,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:37:34,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:37:34,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:37:34,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:37:34,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:37:34,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:37:34,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:37:34,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:37:34,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:37:34,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:37:34,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:37:34,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:37:34,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:37:34,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:37:34,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:37:34,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:37:34,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:37:34,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:37:34,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:37:34,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:37:34,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:37:34,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:37:34,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:37:34,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:37:34,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:37:34,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:37:34,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:37:34,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:37:34,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:37:34,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:37:34,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:37:34,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:37:34,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:37:34,499 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:37:34,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:37:34,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:37:34,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:37:34,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:37:34,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:37:34,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:37:34,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:37:34,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:37:34,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:37:34,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:37:34,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:37:34,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:37:34,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:37:34,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:37:34,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:37:34,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:37:34,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:37:34,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f912e141cfd9116e6012d7a1a78045cf8af895a [2021-08-29 14:37:34,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:37:34,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:37:34,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:37:34,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:37:34,732 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:37:34,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c [2021-08-29 14:37:34,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c658748de/b7f996225e50427c8ebabf5b116ae6db/FLAG0205483d6 [2021-08-29 14:37:35,118 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:37:35,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c [2021-08-29 14:37:35,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c658748de/b7f996225e50427c8ebabf5b116ae6db/FLAG0205483d6 [2021-08-29 14:37:35,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c658748de/b7f996225e50427c8ebabf5b116ae6db [2021-08-29 14:37:35,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:37:35,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:37:35,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:37:35,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:37:35,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:37:35,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a75d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35, skipping insertion in model container [2021-08-29 14:37:35,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:37:35,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:37:35,248 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2021-08-29 14:37:35,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:37:35,259 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:37:35,266 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2021-08-29 14:37:35,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:37:35,314 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:37:35,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35 WrapperNode [2021-08-29 14:37:35,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:37:35,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:37:35,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:37:35,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:37:35,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:37:35,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:37:35,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:37:35,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:37:35,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:37:35,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:37:35,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:37:35,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:37:35,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (1/1) ... [2021-08-29 14:37:35,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:37:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:37:35,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 14:37:35,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 14:37:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:37:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:37:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:37:35,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:37:35,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:37:35,543 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 14:37:35,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:37:35 BoogieIcfgContainer [2021-08-29 14:37:35,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:37:35,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:37:35,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:37:35,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:37:35,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:37:35" (1/3) ... [2021-08-29 14:37:35,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b8450f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:37:35, skipping insertion in model container [2021-08-29 14:37:35,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:37:35" (2/3) ... [2021-08-29 14:37:35,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b8450f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:37:35, skipping insertion in model container [2021-08-29 14:37:35,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:37:35" (3/3) ... [2021-08-29 14:37:35,551 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound50.c [2021-08-29 14:37:35,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:37:35,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 14:37:35,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:37:35,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 14:37:35,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 14:37:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-08-29 14:37:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 14:37:35,617 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:37:35,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:37:35,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:37:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:37:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-08-29 14:37:35,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:37:35,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662749545] [2021-08-29 14:37:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:37:35,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:37:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:37:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:37:35,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:37:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662749545] [2021-08-29 14:37:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662749545] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:37:35,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:37:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:37:35,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488575373] [2021-08-29 14:37:35,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:37:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:37:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:37:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:37:35,799 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 states have internal predecessors, (22), 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-08-29 14:37:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:37:35,852 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-08-29 14:37:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:37:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-08-29 14:37:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:37:35,865 INFO L225 Difference]: With dead ends: 31 [2021-08-29 14:37:35,866 INFO L226 Difference]: Without dead ends: 13 [2021-08-29 14:37:35,867 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:37:35,869 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.63ms IncrementalHoareTripleChecker+Time [2021-08-29 14:37:35,870 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 17 Unknown, 0 Unchecked, 0.16ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 44.63ms Time] [2021-08-29 14:37:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-29 14:37:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-29 14:37:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-08-29 14:37:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-08-29 14:37:35,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-08-29 14:37:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:37:35,898 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-08-29 14:37:35,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-08-29 14:37:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-08-29 14:37:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 14:37:35,914 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:37:35,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:37:35,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:37:35,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:37:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:37:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-08-29 14:37:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:37:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199447102] [2021-08-29 14:37:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:37:35,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:37:35,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:37:35,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644762794] [2021-08-29 14:37:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:37:35,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:37:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:37:35,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:37:35,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 14:37:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:37:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 14:37:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:37:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:37:36,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:37:36,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:37:36,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199447102] [2021-08-29 14:37:36,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:37:36,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644762794] [2021-08-29 14:37:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644762794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:37:36,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:37:36,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:37:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367683911] [2021-08-29 14:37:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:37:36,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:37:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:37:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:37:36,053 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-29 14:37:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:37:36,089 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-08-29 14:37:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:37:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 7 [2021-08-29 14:37:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:37:36,090 INFO L225 Difference]: With dead ends: 23 [2021-08-29 14:37:36,090 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 14:37:36,091 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.73ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:37:36,092 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.24ms IncrementalHoareTripleChecker+Time [2021-08-29 14:37:36,094 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 25.24ms Time] [2021-08-29 14:37:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 14:37:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-29 14:37:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-08-29 14:37:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-08-29 14:37:36,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2021-08-29 14:37:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:37:36,100 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-08-29 14:37:36,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-29 14:37:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-08-29 14:37:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 14:37:36,103 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:37:36,103 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:37:36,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 14:37:36,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:37:36,304 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:37:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:37:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-08-29 14:37:36,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:37:36,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442616061] [2021-08-29 14:37:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:37:36,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:37:36,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:37:36,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157715612] [2021-08-29 14:37:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:37:36,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:37:36,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:37:36,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:37:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 14:37:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:37:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:37:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:37:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:37:36,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:37:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 14:37:36,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:37:36,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442616061] [2021-08-29 14:37:36,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:37:36,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157715612] [2021-08-29 14:37:36,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157715612] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:37:36,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:37:36,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-29 14:37:36,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244584459] [2021-08-29 14:37:36,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:37:36,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:37:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:37:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:37:36,500 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-08-29 14:37:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:37:36,559 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-29 14:37:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:37:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) Word has length 10 [2021-08-29 14:37:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:37:36,560 INFO L225 Difference]: With dead ends: 21 [2021-08-29 14:37:36,560 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 14:37:36,560 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.99ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:37:36,561 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.25ms IncrementalHoareTripleChecker+Time [2021-08-29 14:37:36,562 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.25ms Time] [2021-08-29 14:37:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 14:37:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 14:37:36,562 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) [2021-08-29 14:37:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 14:37:36,563 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-08-29 14:37:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:37:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 14:37:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-08-29 14:37:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 14:37:36,563 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 14:37:36,565 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 14:37:36,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 14:37:36,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 14:37:36,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 14:37:36,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 14:37:36,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:36,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:36,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:36,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:36,832 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 14:37:36,833 INFO L854 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0)) (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-08-29 14:37:36,833 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-29 14:37:36,833 INFO L858 garLoopResultBuilder]: For program point L27-3(lines 27 36) no Hoare annotation was computed. [2021-08-29 14:37:36,833 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-08-29 14:37:36,833 INFO L858 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-08-29 14:37:36,833 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-29 14:37:36,834 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 14:37:36,835 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 14:37:36,835 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 14:37:36,835 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-29 14:37:36,835 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-08-29 14:37:36,836 INFO L854 garLoopResultBuilder]: At program point L10-2(lines 30 31) the Hoare annotation is: (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) [2021-08-29 14:37:36,836 INFO L858 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-08-29 14:37:36,836 INFO L861 garLoopResultBuilder]: At program point L39(lines 17 40) the Hoare annotation is: true [2021-08-29 14:37:36,836 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-08-29 14:37:36,836 INFO L861 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: true [2021-08-29 14:37:36,839 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:37:36,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:37:36 BoogieIcfgContainer [2021-08-29 14:37:36,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:37:36,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:37:36,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:37:36,855 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:37:36,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:37:35" (3/4) ... [2021-08-29 14:37:36,857 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 14:37:36,866 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-29 14:37:36,866 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 14:37:36,867 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:37:36,867 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:37:36,893 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:37:36,893 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:37:36,893 INFO L158 Benchmark]: Toolchain (without parser) took 1754.04ms. Allocated memory was 77.6MB in the beginning and 104.9MB in the end (delta: 27.3MB). Free memory was 44.0MB in the beginning and 77.4MB in the end (delta: -33.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:36,895 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 77.6MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:36,895 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.84ms. Allocated memory is still 77.6MB. Free memory was 43.7MB in the beginning and 62.1MB in the end (delta: -18.4MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-08-29 14:37:36,896 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.62ms. Allocated memory is still 77.6MB. Free memory was 62.1MB in the beginning and 60.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:37:36,896 INFO L158 Benchmark]: Boogie Preprocessor took 26.80ms. Allocated memory is still 77.6MB. Free memory was 60.6MB in the beginning and 59.7MB in the end (delta: 878.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:36,897 INFO L158 Benchmark]: RCFGBuilder took 175.62ms. Allocated memory is still 77.6MB. Free memory was 59.4MB in the beginning and 51.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 14:37:36,897 INFO L158 Benchmark]: TraceAbstraction took 1306.10ms. Allocated memory was 77.6MB in the beginning and 104.9MB in the end (delta: 27.3MB). Free memory was 50.4MB in the beginning and 80.1MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:36,897 INFO L158 Benchmark]: Witness Printer took 38.53ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 77.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:37:36,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 77.6MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.84ms. Allocated memory is still 77.6MB. Free memory was 43.7MB in the beginning and 62.1MB in the end (delta: -18.4MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.62ms. Allocated memory is still 77.6MB. Free memory was 62.1MB in the beginning and 60.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.80ms. Allocated memory is still 77.6MB. Free memory was 60.6MB in the beginning and 59.7MB in the end (delta: 878.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 175.62ms. Allocated memory is still 77.6MB. Free memory was 59.4MB in the beginning and 51.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1306.10ms. Allocated memory was 77.6MB in the beginning and 104.9MB in the end (delta: 27.3MB). Free memory was 50.4MB in the beginning and 80.1MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 38.53ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 77.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: 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 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1249.16ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 22.52ms, AutomataDifference: 198.93ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 54.88ms, InitialAbstractionConstructionTime: 7.12ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 105.12ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 86.38ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 88 IncrementalHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 0 mSDtfsCounter, 88 mSolverCounterSat, 1.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.74ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 23.60ms AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 12 NumberOfFragments, 36 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 22.33ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 31 FormulaSimplificationTreeSizeReductionInter, 27.70ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 17.49ms SsaConstructionTime, 47.29ms SatisfiabilityAnalysisTime, 266.05ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 98 SizeOfPredicates, 6 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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 2 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: y + y * y == 2 * x && 1 <= cond - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (y == 0 && x == 0) || (y + y * y == 2 * x && 1 <= cond) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 14:37:36,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...