./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY --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 2bbfc52b9a0467d32481e7413235257f8cdbdcb51c829bb358c94a1739554a21 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:42:39,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:42:39,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:42:39,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:42:39,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:42:39,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:42:39,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:42:39,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:42:39,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:42:39,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:42:39,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:42:39,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:42:39,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:42:39,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:42:39,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:42:39,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:42:39,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:42:39,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:42:39,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:42:39,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:42:39,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:42:39,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:42:39,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:42:39,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:42:39,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:42:39,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:42:39,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:42:39,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:42:39,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:42:39,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:42:39,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:42:39,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:42:39,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:42:39,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:42:39,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:42:39,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:42:39,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:42:39,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:42:39,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:42:39,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:42:39,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:42:39,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:42:39,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:42:39,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:42:39,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:42:39,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:42:39,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:42:39,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:42:39,545 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:42:39,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:42:39,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:42:39,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:42:39,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:42:39,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:42:39,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:42:39,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:42:39,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:42:39,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:42:39,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:42:39,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:42:39,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:42:39,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:42:39,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:42:39,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:42:39,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:42:39,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:42:39,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:42:39,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:42:39,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:42:39,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:42:39,552 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:42:39,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:42:39,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:42:39,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:42:39,555 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bbfc52b9a0467d32481e7413235257f8cdbdcb51c829bb358c94a1739554a21 [2021-11-07 08:42:39,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:42:39,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:42:39,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:42:39,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:42:39,932 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:42:39,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/recursive-simple/id_b2_o3.c [2021-11-07 08:42:40,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/data/0196cecd0/2654ca50081d4ac6a56c6d17f0fb7332/FLAG7e61d3a7b [2021-11-07 08:42:40,541 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:42:40,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/sv-benchmarks/c/recursive-simple/id_b2_o3.c [2021-11-07 08:42:40,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/data/0196cecd0/2654ca50081d4ac6a56c6d17f0fb7332/FLAG7e61d3a7b [2021-11-07 08:42:40,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/data/0196cecd0/2654ca50081d4ac6a56c6d17f0fb7332 [2021-11-07 08:42:40,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:42:40,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:42:40,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:42:40,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:42:40,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:42:40,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:42:40" (1/1) ... [2021-11-07 08:42:40,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7aafe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:40, skipping insertion in model container [2021-11-07 08:42:40,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:42:40" (1/1) ... [2021-11-07 08:42:40,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:42:40,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:42:41,197 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/sv-benchmarks/c/recursive-simple/id_b2_o3.c[568,581] [2021-11-07 08:42:41,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:42:41,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:42:41,232 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/sv-benchmarks/c/recursive-simple/id_b2_o3.c[568,581] [2021-11-07 08:42:41,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:42:41,252 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:42:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41 WrapperNode [2021-11-07 08:42:41,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:42:41,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:42:41,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:42:41,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:42:41,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:42:41,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:42:41,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:42:41,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:42:41,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:42:41,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:42:41,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:42:41,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:42:41,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (1/1) ... [2021-11-07 08:42:41,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:42:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:41,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:42:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:42:41,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:42:41,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:42:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:42:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-11-07 08:42:41,427 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-11-07 08:42:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:42:41,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:42:41,636 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:42:41,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:42:41 BoogieIcfgContainer [2021-11-07 08:42:41,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:42:41,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:42:41,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:42:41,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:42:41,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:42:40" (1/3) ... [2021-11-07 08:42:41,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e42fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:42:41, skipping insertion in model container [2021-11-07 08:42:41,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:42:41" (2/3) ... [2021-11-07 08:42:41,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e42fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:42:41, skipping insertion in model container [2021-11-07 08:42:41,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:42:41" (3/3) ... [2021-11-07 08:42:41,657 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2021-11-07 08:42:41,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:42:41,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:42:41,732 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:42:41,741 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-11-07 08:42:41,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:42:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:42:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:42:41,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:41,768 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:41,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2021-11-07 08:42:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:41,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809334851] [2021-11-07 08:42:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:41,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:42,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:42,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809334851] [2021-11-07 08:42:42,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809334851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:42,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:42,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:42:42,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346274233] [2021-11-07 08:42:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:42:42,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:42:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:42:42,141 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:42:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:42,248 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-11-07 08:42:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:42:42,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 08:42:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:42,261 INFO L225 Difference]: With dead ends: 29 [2021-11-07 08:42:42,276 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 08:42:42,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:42:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 08:42:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 08:42:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:42:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-07 08:42:42,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-11-07 08:42:42,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:42,330 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-07 08:42:42,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:42:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-07 08:42:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:42:42,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:42,333 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:42,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:42:42,334 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2021-11-07 08:42:42,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:42,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81275120] [2021-11-07 08:42:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:42,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:42:42,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:42,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81275120] [2021-11-07 08:42:42,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81275120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:42,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:42,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:42:42,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078586373] [2021-11-07 08:42:42,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:42:42,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:42:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:42:42,580 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:42,608 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-07 08:42:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:42:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-07 08:42:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:42,631 INFO L225 Difference]: With dead ends: 28 [2021-11-07 08:42:42,631 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:42:42,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:42:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:42:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-07 08:42:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:42:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-07 08:42:42,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-11-07 08:42:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:42,645 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-07 08:42:42,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-07 08:42:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:42:42,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:42,648 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:42,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:42:42,650 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2021-11-07 08:42:42,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:42,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258926043] [2021-11-07 08:42:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:42,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:42:42,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:42,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258926043] [2021-11-07 08:42:42,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258926043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:42,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128465039] [2021-11-07 08:42:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:42,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:42,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:42,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:42,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:42:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:42:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:42:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128465039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:43,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:43,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 08:42:43,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135079961] [2021-11-07 08:42:43,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:42:43,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:42:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:42:43,250 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:43,311 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-07 08:42:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:42:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-07 08:42:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:43,313 INFO L225 Difference]: With dead ends: 24 [2021-11-07 08:42:43,314 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:42:43,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:42:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:42:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 08:42:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:42:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-07 08:42:43,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-11-07 08:42:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-07 08:42:43,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-07 08:42:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:42:43,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:43,328 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:43,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:43,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:43,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times [2021-11-07 08:42:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:43,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559321946] [2021-11-07 08:42:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:43,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:42:43,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:43,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559321946] [2021-11-07 08:42:43,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559321946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:43,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340845540] [2021-11-07 08:42:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:43,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:43,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:43,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:42:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:42:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:42:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340845540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:44,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:44,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-07 08:42:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050339508] [2021-11-07 08:42:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:42:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:42:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:44,141 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:44,162 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-07 08:42:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:42:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-07 08:42:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:44,166 INFO L225 Difference]: With dead ends: 26 [2021-11-07 08:42:44,166 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:42:44,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:42:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-07 08:42:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:42:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-07 08:42:44,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24 [2021-11-07 08:42:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:44,181 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-07 08:42:44,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-07 08:42:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:42:44,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:44,183 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:44,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:44,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:44,405 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash -727314696, now seen corresponding path program 2 times [2021-11-07 08:42:44,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:44,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848569398] [2021-11-07 08:42:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:44,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:44,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:42:44,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848569398] [2021-11-07 08:42:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848569398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620489251] [2021-11-07 08:42:44,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:42:44,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:44,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:44,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:42:44,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:42:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:42:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:42:45,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620489251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:45,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:45,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:42:45,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337909132] [2021-11-07 08:42:45,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:42:45,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:42:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:42:45,046 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:42:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:45,149 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-07 08:42:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:42:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-07 08:42:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:45,153 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:42:45,153 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 08:42:45,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:42:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 08:42:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-07 08:42:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:42:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-07 08:42:45,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 24 [2021-11-07 08:42:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:45,178 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-07 08:42:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:42:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-07 08:42:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:42:45,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:45,186 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:45,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 08:42:45,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:45,402 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1955837112, now seen corresponding path program 3 times [2021-11-07 08:42:45,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:45,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783864540] [2021-11-07 08:42:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:45,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:45,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:45,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:45,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:42:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:42:45,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:45,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783864540] [2021-11-07 08:42:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783864540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:45,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006527112] [2021-11-07 08:42:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:42:45,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:45,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:45,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:42:45,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:42:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:42:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:42:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006527112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:45,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-07 08:42:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119976367] [2021-11-07 08:42:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:42:45,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:42:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:42:45,857 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:45,867 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-07 08:42:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:42:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-11-07 08:42:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:45,868 INFO L225 Difference]: With dead ends: 24 [2021-11-07 08:42:45,868 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 08:42:45,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:42:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 08:42:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 08:42:45,869 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) [2021-11-07 08:42:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 08:42:45,869 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-11-07 08:42:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:45,870 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 08:42:45,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:42:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 08:42:45,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 08:42:45,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:42:45,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:46,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:46,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 08:42:46,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 08:42:46,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 08:42:46,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 08:42:46,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 08:42:46,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 08:42:46,107 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 08:42:46,107 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-07 08:42:46,108 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 08:42:46,108 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-07 08:42:46,108 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-07 08:42:46,108 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-11-07 08:42:46,108 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L860 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: true [2021-11-07 08:42:46,109 INFO L857 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 19) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-11-07 08:42:46,109 INFO L860 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: true [2021-11-07 08:42:46,110 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-11-07 08:42:46,110 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-07 08:42:46,110 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-11-07 08:42:46,114 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2021-11-07 08:42:46,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:42:46,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:42:46 BoogieIcfgContainer [2021-11-07 08:42:46,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:42:46,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:42:46,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:42:46,120 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:42:46,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:42:41" (3/4) ... [2021-11-07 08:42:46,124 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 08:42:46,133 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-11-07 08:42:46,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-07 08:42:46,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 08:42:46,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 08:42:46,139 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 08:42:46,175 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 08:42:46,175 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:42:46,177 INFO L168 Benchmark]: Toolchain (without parser) took 5272.12 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 75.8 MB in the beginning and 59.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,178 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 92.3 MB in the beginning and 92.3 MB in the end (delta: 61.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:42:46,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 88.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 113.2 MB. Free memory was 88.5 MB in the beginning and 87.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,180 INFO L168 Benchmark]: Boogie Preprocessor took 22.50 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 86.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:42:46,181 INFO L168 Benchmark]: RCFGBuilder took 319.68 ms. Allocated memory is still 113.2 MB. Free memory was 86.2 MB in the beginning and 77.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,181 INFO L168 Benchmark]: TraceAbstraction took 4478.49 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 76.4 MB in the beginning and 61.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,182 INFO L168 Benchmark]: Witness Printer took 55.52 ms. Allocated memory is still 144.7 MB. Free memory was 61.1 MB in the beginning and 59.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:42:46,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 92.3 MB in the beginning and 92.3 MB in the end (delta: 61.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 347.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 88.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 113.2 MB. Free memory was 88.5 MB in the beginning and 87.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.50 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 86.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 319.68 ms. Allocated memory is still 113.2 MB. Free memory was 86.2 MB in the beginning and 77.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4478.49 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 76.4 MB in the beginning and 61.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. * Witness Printer took 55.52 ms. Allocated memory is still 144.7 MB. Free memory was 61.1 MB in the beginning and 59.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: 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 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 11 SDslu, 400 SDs, 0 SdLazy, 135 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 219 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 651 SizeOfPredicates, 7 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 102/138 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! [2021-11-07 08:42:46,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a4022c-ef58-4580-9583-78c1f1c4809c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE