./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_1b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:31:13,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:31:13,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:31:13,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:31:13,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:31:13,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:31:13,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:31:13,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:31:13,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:31:13,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:31:13,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:31:13,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:31:13,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:31:13,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:31:13,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:31:13,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:31:13,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:31:13,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:31:13,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:31:13,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:31:13,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:31:13,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:31:13,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:31:13,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:31:13,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:31:13,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:31:13,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:31:13,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:31:13,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:31:13,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:31:13,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:31:13,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:31:13,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:31:13,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:31:13,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:31:13,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:31:13,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:31:13,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:31:13,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:31:13,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:31:13,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:31:13,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:31:13,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:31:13,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:31:13,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:31:13,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:31:13,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:31:13,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:31:13,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:31:13,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:31:13,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:31:13,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:31:13,599 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:31:13,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:31:13,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:31:13,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:31:13,600 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:31:13,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:31:13,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:31:13,601 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:31:13,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:31:13,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:31:13,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:31:13,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:31:13,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:31:13,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:31:13,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:31:13,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:31:13,604 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:31:13,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:31:13,605 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:31:13,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:31:13,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:31:13,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:31:13,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:13,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:31:13,607 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:31:13,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:31:13,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:31:13,608 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:31:13,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:31:13,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:31:13,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:31:13,609 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_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 [2022-11-26 00:31:13,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:31:13,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:31:13,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:31:13,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:31:13,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:31:13,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-simple/nested_1b.c [2022-11-26 00:31:17,061 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:31:17,278 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:31:17,278 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/sv-benchmarks/c/loop-simple/nested_1b.c [2022-11-26 00:31:17,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/data/82ff3de48/a467702c62b741b384f62b7016eb04c0/FLAGd1a0c16a8 [2022-11-26 00:31:17,305 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/data/82ff3de48/a467702c62b741b384f62b7016eb04c0 [2022-11-26 00:31:17,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:31:17,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:31:17,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:17,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:31:17,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:31:17,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17090daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17, skipping insertion in model container [2022-11-26 00:31:17,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:31:17,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:31:17,499 WARN L237 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_82a84a7d-8647-4d9d-b967-e362b2c350ea/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2022-11-26 00:31:17,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:17,525 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:31:17,542 WARN L237 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_82a84a7d-8647-4d9d-b967-e362b2c350ea/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2022-11-26 00:31:17,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:17,558 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:31:17,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17 WrapperNode [2022-11-26 00:31:17,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:17,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:17,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:31:17,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:31:17,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,591 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-11-26 00:31:17,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:17,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:31:17,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:31:17,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:31:17,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:31:17,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:31:17,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:31:17,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:31:17,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (1/1) ... [2022-11-26 00:31:17,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:17,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:17,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:31:17,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:31:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:31:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:31:17,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:31:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:31:17,787 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:31:17,789 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:31:17,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:31:17,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:31:17,986 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:31:17,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:17 BoogieIcfgContainer [2022-11-26 00:31:17,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:31:18,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:31:18,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:31:18,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:31:18,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:31:17" (1/3) ... [2022-11-26 00:31:18,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1000a33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:18, skipping insertion in model container [2022-11-26 00:31:18,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:17" (2/3) ... [2022-11-26 00:31:18,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1000a33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:18, skipping insertion in model container [2022-11-26 00:31:18,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:17" (3/3) ... [2022-11-26 00:31:18,013 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1b.c [2022-11-26 00:31:18,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:31:18,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:31:18,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:31:18,154 INFO L357 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f8a79d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:31:18,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:31:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2022-11-26 00:31:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:31:18,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:18,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:31:18,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1848580, now seen corresponding path program 1 times [2022-11-26 00:31:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:18,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524926605] [2022-11-26 00:31:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:18,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:18,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:18,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524926605] [2022-11-26 00:31:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524926605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:18,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:18,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:31:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389368140] [2022-11-26 00:31:18,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:18,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:18,466 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-26 00:31:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:18,518 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-26 00:31:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-26 00:31:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:18,532 INFO L225 Difference]: With dead ends: 13 [2022-11-26 00:31:18,532 INFO L226 Difference]: Without dead ends: 6 [2022-11-26 00:31:18,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:18,551 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:18,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-26 00:31:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-26 00:31:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-26 00:31:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-26 00:31:18,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-26 00:31:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:18,618 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-26 00:31:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-26 00:31:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-26 00:31:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:31:18,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:18,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:31:18,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:31:18,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash 57200258, now seen corresponding path program 1 times [2022-11-26 00:31:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:18,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672757] [2022-11-26 00:31:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:18,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:18,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672757] [2022-11-26 00:31:18,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4404722] [2022-11-26 00:31:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:18,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:18,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:18,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:31:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:31:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:18,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4404722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:18,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661835889] [2022-11-26 00:31:18,988 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-26 00:31:18,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:18,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:19,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:19,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:19,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:19,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= 6 |ULTIMATE.start_main_~a~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:19,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:19,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:19,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 00:31:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044030946] [2022-11-26 00:31:19,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:31:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:31:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:31:19,308 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-26 00:31:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:19,342 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-26 00:31:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:31:19,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 5 [2022-11-26 00:31:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:19,346 INFO L225 Difference]: With dead ends: 12 [2022-11-26 00:31:19,346 INFO L226 Difference]: Without dead ends: 9 [2022-11-26 00:31:19,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:31:19,352 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:19,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-26 00:31:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-26 00:31:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-26 00:31:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-26 00:31:19,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-26 00:31:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:19,362 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-26 00:31:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-26 00:31:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-26 00:31:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:31:19,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:19,364 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-26 00:31:19,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:19,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:19,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1154112380, now seen corresponding path program 2 times [2022-11-26 00:31:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:19,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325097764] [2022-11-26 00:31:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:19,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325097764] [2022-11-26 00:31:19,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325097764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996384767] [2022-11-26 00:31:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:31:19,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:19,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:19,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:31:19,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:31:19,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:31:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:19,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996384767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:19,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347496113] [2022-11-26 00:31:19,948 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-26 00:31:19,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:19,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:19,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:19,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:20,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:20,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '154#(and (= 6 |ULTIMATE.start_main_~a~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:20,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:20,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-26 00:31:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186055736] [2022-11-26 00:31:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:31:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:31:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:31:20,060 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-11-26 00:31:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:20,086 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-26 00:31:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:31:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) Word has length 8 [2022-11-26 00:31:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:20,089 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:31:20,089 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 00:31:20,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:31:20,093 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:20,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 00:31:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-26 00:31:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-11-26 00:31:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-26 00:31:20,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2022-11-26 00:31:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:20,107 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-26 00:31:20,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-11-26 00:31:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-26 00:31:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:31:20,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:20,109 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-26 00:31:20,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:20,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:20,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1003817916, now seen corresponding path program 3 times [2022-11-26 00:31:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:20,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837363562] [2022-11-26 00:31:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:31:20,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:31:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:31:20,361 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:31:20,362 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:31:20,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:31:20,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:31:20,369 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-26 00:31:20,374 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:31:20,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:31:20 BoogieIcfgContainer [2022-11-26 00:31:20,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:31:20,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:31:20,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:31:20,402 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:31:20,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:17" (3/4) ... [2022-11-26 00:31:20,405 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:31:20,456 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:31:20,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:31:20,457 INFO L158 Benchmark]: Toolchain (without parser) took 3144.21ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 101.3MB in the beginning and 71.8MB in the end (delta: 29.6MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,457 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory was 87.9MB in the beginning and 87.7MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:31:20,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.06ms. Allocated memory is still 146.8MB. Free memory was 101.0MB in the beginning and 91.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.98ms. Allocated memory is still 146.8MB. Free memory was 91.0MB in the beginning and 89.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,462 INFO L158 Benchmark]: Boogie Preprocessor took 17.22ms. Allocated memory is still 146.8MB. Free memory was 89.7MB in the beginning and 88.7MB in the end (delta: 978.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:31:20,463 INFO L158 Benchmark]: RCFGBuilder took 378.49ms. Allocated memory is still 146.8MB. Free memory was 88.7MB in the beginning and 79.6MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,464 INFO L158 Benchmark]: TraceAbstraction took 2400.55ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 78.9MB in the beginning and 73.8MB in the end (delta: 5.0MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,464 INFO L158 Benchmark]: Witness Printer took 54.09ms. Allocated memory is still 176.2MB. Free memory was 73.8MB in the beginning and 71.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:20,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory was 87.9MB in the beginning and 87.7MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.06ms. Allocated memory is still 146.8MB. Free memory was 101.0MB in the beginning and 91.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.98ms. Allocated memory is still 146.8MB. Free memory was 91.0MB in the beginning and 89.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.22ms. Allocated memory is still 146.8MB. Free memory was 89.7MB in the beginning and 88.7MB in the end (delta: 978.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 378.49ms. Allocated memory is still 146.8MB. Free memory was 88.7MB in the beginning and 79.6MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2400.55ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 78.9MB in the beginning and 73.8MB in the end (delta: 5.0MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. * Witness Printer took 54.09ms. Allocated memory is still 176.2MB. Free memory was 73.8MB in the beginning and 71.8MB in the end (delta: 2.1MB). 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int a = 6; [L19] a = 0 VAL [a=0] [L19] COND TRUE a < 6 [L19] ++a VAL [a=1] [L19] COND TRUE a < 6 [L19] ++a VAL [a=2] [L19] COND TRUE a < 6 [L19] ++a VAL [a=3] [L19] COND TRUE a < 6 [L19] ++a VAL [a=4] [L19] COND TRUE a < 6 [L19] ++a VAL [a=5] [L19] COND TRUE a < 6 [L19] ++a VAL [a=6] [L19] COND FALSE !(a < 6) VAL [a=6] [L22] COND TRUE a == 6 VAL [a=6] [L23] reach_error() VAL [a=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 7 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 00:31:20,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a84a7d-8647-4d9d-b967-e362b2c350ea/bin/utaipan-ByfvJB40ur/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE