./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs --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 3e8e82144e2602d2d7c8b848ca0201a6812249c8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs --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 3e8e82144e2602d2d7c8b848ca0201a6812249c8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:57:20,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:57:20,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:57:20,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:57:20,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:57:20,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:57:20,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:57:20,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:57:20,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:57:20,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:57:20,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:57:20,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:57:20,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:57:20,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:57:20,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:57:20,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:57:20,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:57:20,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:57:20,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:57:20,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:57:20,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:57:20,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:57:20,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:57:20,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:57:20,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:57:20,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:57:20,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:57:20,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:57:20,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:57:20,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:57:20,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:57:20,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:57:20,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:57:20,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:57:20,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:57:20,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:57:20,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:57:20,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:57:20,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:57:20,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:57:20,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:57:20,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:57:20,381 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:57:20,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:57:20,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:57:20,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:57:20,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:57:20,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:57:20,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:57:20,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:57:20,392 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:57:20,392 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:57:20,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:57:20,394 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:57:20,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:57:20,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:57:20,395 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:57:20,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:57:20,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:57:20,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:57:20,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:57:20,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:57:20,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:57:20,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:57:20,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:57:20,398 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:57:20,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:57:20,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:57:20,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:57:20,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:57:20,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:57:20,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:57:20,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:57:20,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:57:20,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:57:20,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:57:20,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:57:20,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:57:20,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:57:20,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:57:20,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:57:20,405 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e8e82144e2602d2d7c8b848ca0201a6812249c8 [2021-10-16 02:57:20,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:57:20,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:57:20,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:57:20,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:57:20,777 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:57:20,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c [2021-10-16 02:57:20,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/b583a4f59/97716d75a4c74c67ba8da395f3d2dc2a/FLAG65dcf1efa [2021-10-16 02:57:21,492 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:57:21,493 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c [2021-10-16 02:57:21,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/b583a4f59/97716d75a4c74c67ba8da395f3d2dc2a/FLAG65dcf1efa [2021-10-16 02:57:21,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/b583a4f59/97716d75a4c74c67ba8da395f3d2dc2a [2021-10-16 02:57:21,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:57:21,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:57:21,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:57:21,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:57:21,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:57:21,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:57:21" (1/1) ... [2021-10-16 02:57:21,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e962a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:21, skipping insertion in model container [2021-10-16 02:57:21,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:57:21" (1/1) ... [2021-10-16 02:57:21,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:57:21,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:57:22,153 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c[37752,37765] [2021-10-16 02:57:22,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:57:22,174 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:57:22,245 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c[37752,37765] [2021-10-16 02:57:22,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:57:22,265 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:57:22,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22 WrapperNode [2021-10-16 02:57:22,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:57:22,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:57:22,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:57:22,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:57:22,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:57:22,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:57:22,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:57:22,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:57:22,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:57:22,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:57:22,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:57:22,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:57:22,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (1/1) ... [2021-10-16 02:57:22,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:57:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:57:22,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:57:22,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:57:22,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:57:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:57:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:57:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:57:22,676 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:57:23,319 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-16 02:57:23,320 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-16 02:57:23,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:57:23,846 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:57:23,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:57:23 BoogieIcfgContainer [2021-10-16 02:57:23,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:57:23,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:57:23,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:57:23,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:57:23,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:57:21" (1/3) ... [2021-10-16 02:57:23,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c9b121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:57:23, skipping insertion in model container [2021-10-16 02:57:23,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:22" (2/3) ... [2021-10-16 02:57:23,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c9b121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:57:23, skipping insertion in model container [2021-10-16 02:57:23,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:57:23" (3/3) ... [2021-10-16 02:57:23,860 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-2.c [2021-10-16 02:57:23,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:57:23,867 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:57:23,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:57:23,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:57:23,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:57:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 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) [2021-10-16 02:57:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:57:23,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:23,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:23,961 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2034919861, now seen corresponding path program 1 times [2021-10-16 02:57:23,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:23,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576148326] [2021-10-16 02:57:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:23,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:24,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:24,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576148326] [2021-10-16 02:57:24,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576148326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:24,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:24,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:57:24,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025659006] [2021-10-16 02:57:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:24,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:57:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:24,278 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-10-16 02:57:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:24,509 INFO L93 Difference]: Finished difference Result 171 states and 295 transitions. [2021-10-16 02:57:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2021-10-16 02:57:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:24,535 INFO L225 Difference]: With dead ends: 171 [2021-10-16 02:57:24,535 INFO L226 Difference]: Without dead ends: 84 [2021-10-16 02:57:24,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-16 02:57:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-16 02:57:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 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) [2021-10-16 02:57:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2021-10-16 02:57:24,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 19 [2021-10-16 02:57:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:24,583 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2021-10-16 02:57:24,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-10-16 02:57:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2021-10-16 02:57:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:57:24,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:24,585 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:24,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:57:24,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 14304918, now seen corresponding path program 1 times [2021-10-16 02:57:24,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:24,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41390021] [2021-10-16 02:57:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:24,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:24,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41390021] [2021-10-16 02:57:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41390021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:24,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:24,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:57:24,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032374355] [2021-10-16 02:57:24,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:24,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:57:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:24,683 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-16 02:57:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:24,856 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2021-10-16 02:57:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-16 02:57:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:24,865 INFO L225 Difference]: With dead ends: 180 [2021-10-16 02:57:24,865 INFO L226 Difference]: Without dead ends: 99 [2021-10-16 02:57:24,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-16 02:57:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-10-16 02:57:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4270833333333333) internal successors, (137), 96 states have internal predecessors, (137), 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) [2021-10-16 02:57:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2021-10-16 02:57:24,895 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 28 [2021-10-16 02:57:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:24,896 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2021-10-16 02:57:24,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-16 02:57:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2021-10-16 02:57:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 02:57:24,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:24,900 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:24,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:57:24,902 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1796909179, now seen corresponding path program 1 times [2021-10-16 02:57:24,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:24,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080396666] [2021-10-16 02:57:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:24,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:57:25,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:25,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080396666] [2021-10-16 02:57:25,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080396666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:25,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:25,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:57:25,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643697937] [2021-10-16 02:57:25,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:25,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:57:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:25,017 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-10-16 02:57:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:25,188 INFO L93 Difference]: Finished difference Result 208 states and 299 transitions. [2021-10-16 02:57:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2021-10-16 02:57:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:25,191 INFO L225 Difference]: With dead ends: 208 [2021-10-16 02:57:25,221 INFO L226 Difference]: Without dead ends: 114 [2021-10-16 02:57:25,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-16 02:57:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-10-16 02:57:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3963963963963963) internal successors, (155), 111 states have internal predecessors, (155), 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) [2021-10-16 02:57:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 155 transitions. [2021-10-16 02:57:25,233 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 155 transitions. Word has length 39 [2021-10-16 02:57:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:25,234 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 155 transitions. [2021-10-16 02:57:25,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-10-16 02:57:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 155 transitions. [2021-10-16 02:57:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-16 02:57:25,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:25,237 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:25,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:57:25,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1719232952, now seen corresponding path program 1 times [2021-10-16 02:57:25,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:25,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630932565] [2021-10-16 02:57:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:25,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:57:25,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:25,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630932565] [2021-10-16 02:57:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630932565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:57:25,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014127296] [2021-10-16 02:57:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:25,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:57:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:57:25,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:57:25,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:57:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:57:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-16 02:57:25,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-16 02:57:26,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014127296] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:26,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:57:26,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-16 02:57:26,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103036170] [2021-10-16 02:57:26,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:57:26,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:57:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:57:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:57:26,301 INFO L87 Difference]: Start difference. First operand 112 states and 155 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2021-10-16 02:57:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:26,735 INFO L93 Difference]: Finished difference Result 315 states and 470 transitions. [2021-10-16 02:57:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:57:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 52 [2021-10-16 02:57:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:26,740 INFO L225 Difference]: With dead ends: 315 [2021-10-16 02:57:26,741 INFO L226 Difference]: Without dead ends: 205 [2021-10-16 02:57:26,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:57:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-16 02:57:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2021-10-16 02:57:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 186 states have internal predecessors, (256), 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) [2021-10-16 02:57:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2021-10-16 02:57:26,774 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 52 [2021-10-16 02:57:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:26,780 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2021-10-16 02:57:26,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2021-10-16 02:57:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2021-10-16 02:57:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-16 02:57:26,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:26,792 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:26,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:26,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:57:26,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1884195992, now seen corresponding path program 1 times [2021-10-16 02:57:26,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:26,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521291284] [2021-10-16 02:57:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:26,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:57:27,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:27,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521291284] [2021-10-16 02:57:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521291284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:27,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:27,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:57:27,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478756441] [2021-10-16 02:57:27,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:27,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:57:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:27,114 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-16 02:57:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:27,265 INFO L93 Difference]: Finished difference Result 392 states and 545 transitions. [2021-10-16 02:57:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 68 [2021-10-16 02:57:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:27,272 INFO L225 Difference]: With dead ends: 392 [2021-10-16 02:57:27,272 INFO L226 Difference]: Without dead ends: 208 [2021-10-16 02:57:27,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-16 02:57:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-10-16 02:57:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3560975609756099) internal successors, (278), 205 states have internal predecessors, (278), 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) [2021-10-16 02:57:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 278 transitions. [2021-10-16 02:57:27,314 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 278 transitions. Word has length 68 [2021-10-16 02:57:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:27,315 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 278 transitions. [2021-10-16 02:57:27,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-16 02:57:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 278 transitions. [2021-10-16 02:57:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-16 02:57:27,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:27,320 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:27,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:57:27,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1071342575, now seen corresponding path program 1 times [2021-10-16 02:57:27,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:57:27,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604056488] [2021-10-16 02:57:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:27,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:57:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-16 02:57:27,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:57:27,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604056488] [2021-10-16 02:57:27,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604056488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:57:27,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711578685] [2021-10-16 02:57:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:27,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:57:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:57:27,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:57:27,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:57:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:57:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-16 02:57:28,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-16 02:57:28,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711578685] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:57:28,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295702193] [2021-10-16 02:57:28,645 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-10-16 02:57:28,645 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:57:28,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:57:28,662 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:57:28,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:57:28,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,803 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:57:28,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:57:28,806 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:57:28,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:57:28,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 436 [2021-10-16 02:57:28,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:57:28,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:28,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:28,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:57:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:28,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:57:28,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:28,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:28,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:28,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:57:28,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:29,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:57:29,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:29,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:29,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:29,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:57:29,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-16 02:57:29,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:57:29,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:57:29,394 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.6 percent of original size [2021-10-16 02:57:29,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1230 [2021-10-16 02:57:29,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-16 02:57:29,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:1239, output treesize:1230 [2021-10-16 02:57:29,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:29,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-16 02:57:29,660 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:57:29,664 INFO L168 Benchmark]: Toolchain (without parser) took 7841.94 ms. Allocated memory was 144.7 MB in the beginning and 188.7 MB in the end (delta: 44.0 MB). Free memory was 111.5 MB in the beginning and 118.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 91.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,665 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:57:29,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.77 ms. Allocated memory is still 144.7 MB. Free memory was 111.5 MB in the beginning and 116.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.01 ms. Allocated memory is still 144.7 MB. Free memory was 116.4 MB in the beginning and 113.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,666 INFO L168 Benchmark]: Boogie Preprocessor took 54.84 ms. Allocated memory is still 144.7 MB. Free memory was 113.8 MB in the beginning and 111.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,667 INFO L168 Benchmark]: RCFGBuilder took 1411.18 ms. Allocated memory is still 144.7 MB. Free memory was 111.7 MB in the beginning and 111.7 MB in the end (delta: -19.9 kB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,668 INFO L168 Benchmark]: TraceAbstraction took 5811.27 ms. Allocated memory was 144.7 MB in the beginning and 188.7 MB in the end (delta: 44.0 MB). Free memory was 111.7 MB in the beginning and 118.6 MB in the end (delta: -6.9 MB). Peak memory consumption was 91.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:29,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.77 ms. Allocated memory is still 144.7 MB. Free memory was 111.5 MB in the beginning and 116.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.01 ms. Allocated memory is still 144.7 MB. Free memory was 116.4 MB in the beginning and 113.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.84 ms. Allocated memory is still 144.7 MB. Free memory was 113.8 MB in the beginning and 111.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1411.18 ms. Allocated memory is still 144.7 MB. Free memory was 111.7 MB in the beginning and 111.7 MB in the end (delta: -19.9 kB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5811.27 ms. Allocated memory was 144.7 MB in the beginning and 188.7 MB in the end (delta: 44.0 MB). Free memory was 111.7 MB in the beginning and 118.6 MB in the end (delta: -6.9 MB). Peak memory consumption was 91.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:57:29,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:57:32,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:57:32,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:57:32,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:57:32,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:57:32,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:57:32,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:57:32,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:57:32,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:57:32,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:57:32,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:57:32,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:57:32,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:57:32,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:57:32,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:57:32,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:57:32,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:57:32,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:57:32,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:57:32,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:57:32,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:57:32,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:57:32,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:57:32,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:57:32,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:57:32,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:57:32,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:57:32,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:57:32,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:57:32,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:57:32,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:57:32,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:57:32,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:57:32,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:57:32,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:57:32,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:57:32,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:57:32,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:57:32,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:57:32,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:57:32,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:57:32,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:57:32,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:57:32,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:57:32,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:57:32,934 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:57:32,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:57:32,934 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:57:32,935 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:57:32,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:57:32,935 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:57:32,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:57:32,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:57:32,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:57:32,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:57:32,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:57:32,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:57:32,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:57:32,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:57:32,939 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:57:32,939 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:57:32,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:57:32,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:57:32,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:57:32,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:57:32,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:57:32,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:57:32,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:57:32,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:57:32,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:57:32,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:57:32,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:57:32,942 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:57:32,943 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:57:32,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:57:32,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:57:32,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:57:32,944 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e8e82144e2602d2d7c8b848ca0201a6812249c8 [2021-10-16 02:57:33,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:57:33,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:57:33,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:57:33,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:57:33,429 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:57:33,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c [2021-10-16 02:57:33,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/aa291199d/7e597119a7184402b3a5939ba81e5fbe/FLAGffabe858f [2021-10-16 02:57:34,226 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:57:34,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c [2021-10-16 02:57:34,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/aa291199d/7e597119a7184402b3a5939ba81e5fbe/FLAGffabe858f [2021-10-16 02:57:34,539 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/data/aa291199d/7e597119a7184402b3a5939ba81e5fbe [2021-10-16 02:57:34,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:57:34,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:57:34,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:57:34,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:57:34,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:57:34,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:57:34" (1/1) ... [2021-10-16 02:57:34,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb86b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:34, skipping insertion in model container [2021-10-16 02:57:34,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:57:34" (1/1) ... [2021-10-16 02:57:34,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:57:34,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:57:34,992 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c[37752,37765] [2021-10-16 02:57:35,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:57:35,037 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:57:35,142 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_29bd684c-46b8-482d-884d-2e8ef0023bdd/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-2.c[37752,37765] [2021-10-16 02:57:35,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:57:35,171 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:57:35,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35 WrapperNode [2021-10-16 02:57:35,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:57:35,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:57:35,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:57:35,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:57:35,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:57:35,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:57:35,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:57:35,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:57:35,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:57:35,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:57:35,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:57:35,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:57:35,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (1/1) ... [2021-10-16 02:57:35,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:57:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:57:35,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:57:35,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:57:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:57:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:57:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:57:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:57:35,717 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:57:36,269 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-16 02:57:36,269 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-16 02:57:36,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:57:36,280 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:57:36,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:57:36 BoogieIcfgContainer [2021-10-16 02:57:36,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:57:36,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:57:36,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:57:36,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:57:36,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:57:34" (1/3) ... [2021-10-16 02:57:36,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c5b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:57:36, skipping insertion in model container [2021-10-16 02:57:36,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:57:35" (2/3) ... [2021-10-16 02:57:36,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c5b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:57:36, skipping insertion in model container [2021-10-16 02:57:36,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:57:36" (3/3) ... [2021-10-16 02:57:36,292 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-2.c [2021-10-16 02:57:36,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:57:36,299 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:57:36,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:57:36,400 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:57:36,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:57:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 126 states have (on average 1.7142857142857142) internal successors, (216), 127 states have internal predecessors, (216), 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) [2021-10-16 02:57:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:57:36,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:36,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:36,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1457695038, now seen corresponding path program 1 times [2021-10-16 02:57:36,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:36,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333325345] [2021-10-16 02:57:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:36,508 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:36,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:36,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:57:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:57:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:36,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:37,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:37,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333325345] [2021-10-16 02:57:37,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333325345] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:37,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:37,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843935907] [2021-10-16 02:57:37,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:37,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:37,067 INFO L87 Difference]: Start difference. First operand has 128 states, 126 states have (on average 1.7142857142857142) internal successors, (216), 127 states have internal predecessors, (216), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-16 02:57:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:37,353 INFO L93 Difference]: Finished difference Result 252 states and 427 transitions. [2021-10-16 02:57:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-10-16 02:57:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:37,376 INFO L225 Difference]: With dead ends: 252 [2021-10-16 02:57:37,376 INFO L226 Difference]: Without dead ends: 115 [2021-10-16 02:57:37,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-16 02:57:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-16 02:57:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 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) [2021-10-16 02:57:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2021-10-16 02:57:37,462 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 24 [2021-10-16 02:57:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:37,462 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2021-10-16 02:57:37,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-16 02:57:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2021-10-16 02:57:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:57:37,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:37,468 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:37,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:37,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:37,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash 561717339, now seen corresponding path program 1 times [2021-10-16 02:57:37,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:37,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304888245] [2021-10-16 02:57:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:37,686 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:37,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:57:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:38,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:38,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304888245] [2021-10-16 02:57:38,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304888245] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:38,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:38,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:38,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147227441] [2021-10-16 02:57:38,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:38,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:38,201 INFO L87 Difference]: Start difference. First operand 115 states and 172 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-10-16 02:57:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:38,400 INFO L93 Difference]: Finished difference Result 238 states and 360 transitions. [2021-10-16 02:57:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2021-10-16 02:57:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:38,403 INFO L225 Difference]: With dead ends: 238 [2021-10-16 02:57:38,404 INFO L226 Difference]: Without dead ends: 133 [2021-10-16 02:57:38,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-16 02:57:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2021-10-16 02:57:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.4883720930232558) internal successors, (192), 129 states have internal predecessors, (192), 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) [2021-10-16 02:57:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 192 transitions. [2021-10-16 02:57:38,433 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 192 transitions. Word has length 37 [2021-10-16 02:57:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 192 transitions. [2021-10-16 02:57:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-10-16 02:57:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 192 transitions. [2021-10-16 02:57:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-16 02:57:38,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:38,443 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:38,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:38,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:38,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 356453796, now seen corresponding path program 1 times [2021-10-16 02:57:38,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:38,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617554088] [2021-10-16 02:57:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:38,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:38,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:38,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:57:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:38,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:38,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:57:38,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:57:39,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:39,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617554088] [2021-10-16 02:57:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617554088] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:39,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:39,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:39,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260142678] [2021-10-16 02:57:39,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:39,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:39,115 INFO L87 Difference]: Start difference. First operand 130 states and 192 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-16 02:57:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:39,275 INFO L93 Difference]: Finished difference Result 272 states and 408 transitions. [2021-10-16 02:57:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 51 [2021-10-16 02:57:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:39,283 INFO L225 Difference]: With dead ends: 272 [2021-10-16 02:57:39,283 INFO L226 Difference]: Without dead ends: 152 [2021-10-16 02:57:39,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-16 02:57:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2021-10-16 02:57:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4657534246575343) internal successors, (214), 146 states have internal predecessors, (214), 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) [2021-10-16 02:57:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2021-10-16 02:57:39,303 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 51 [2021-10-16 02:57:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:39,304 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2021-10-16 02:57:39,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-16 02:57:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2021-10-16 02:57:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-16 02:57:39,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:39,313 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:39,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:39,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:39,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1238030766, now seen corresponding path program 1 times [2021-10-16 02:57:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:39,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204693911] [2021-10-16 02:57:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:39,525 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:39,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:39,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:57:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:39,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:39,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:57:39,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:57:40,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:40,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204693911] [2021-10-16 02:57:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204693911] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:40,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:57:40,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152887869] [2021-10-16 02:57:40,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:57:40,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:57:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:57:40,155 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-10-16 02:57:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:40,457 INFO L93 Difference]: Finished difference Result 355 states and 540 transitions. [2021-10-16 02:57:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:57:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 68 [2021-10-16 02:57:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:40,460 INFO L225 Difference]: With dead ends: 355 [2021-10-16 02:57:40,460 INFO L226 Difference]: Without dead ends: 218 [2021-10-16 02:57:40,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:57:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-10-16 02:57:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2021-10-16 02:57:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.4354066985645932) internal successors, (300), 209 states have internal predecessors, (300), 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) [2021-10-16 02:57:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2021-10-16 02:57:40,488 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 68 [2021-10-16 02:57:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2021-10-16 02:57:40,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-10-16 02:57:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2021-10-16 02:57:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-16 02:57:40,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:40,496 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:40,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:40,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:40,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 137052613, now seen corresponding path program 1 times [2021-10-16 02:57:40,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:40,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124980313] [2021-10-16 02:57:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:40,713 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:40,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:40,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:57:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:57:41,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:57:41,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:41,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124980313] [2021-10-16 02:57:41,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124980313] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:41,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756142989] [2021-10-16 02:57:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:41,384 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-10-16 02:57:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:41,548 INFO L93 Difference]: Finished difference Result 434 states and 627 transitions. [2021-10-16 02:57:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 69 [2021-10-16 02:57:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:41,554 INFO L225 Difference]: With dead ends: 434 [2021-10-16 02:57:41,555 INFO L226 Difference]: Without dead ends: 234 [2021-10-16 02:57:41,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-16 02:57:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2021-10-16 02:57:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.4210526315789473) internal successors, (324), 228 states have internal predecessors, (324), 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) [2021-10-16 02:57:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 324 transitions. [2021-10-16 02:57:41,574 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 324 transitions. Word has length 69 [2021-10-16 02:57:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:41,575 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 324 transitions. [2021-10-16 02:57:41,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-10-16 02:57:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 324 transitions. [2021-10-16 02:57:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-16 02:57:41,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:41,577 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:41,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:41,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:41,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash 614595817, now seen corresponding path program 1 times [2021-10-16 02:57:41,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:41,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890536541] [2021-10-16 02:57:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:41,793 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:41,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:57:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:57:42,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:57:42,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:42,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890536541] [2021-10-16 02:57:42,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890536541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:42,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:42,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:42,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256252772] [2021-10-16 02:57:42,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:42,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:42,601 INFO L87 Difference]: Start difference. First operand 229 states and 324 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-10-16 02:57:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:42,777 INFO L93 Difference]: Finished difference Result 472 states and 676 transitions. [2021-10-16 02:57:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 86 [2021-10-16 02:57:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:42,780 INFO L225 Difference]: With dead ends: 472 [2021-10-16 02:57:42,781 INFO L226 Difference]: Without dead ends: 253 [2021-10-16 02:57:42,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-16 02:57:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2021-10-16 02:57:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4056224899598393) internal successors, (350), 249 states have internal predecessors, (350), 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) [2021-10-16 02:57:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 350 transitions. [2021-10-16 02:57:42,821 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 350 transitions. Word has length 86 [2021-10-16 02:57:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:42,822 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 350 transitions. [2021-10-16 02:57:42,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-10-16 02:57:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 350 transitions. [2021-10-16 02:57:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:57:42,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:42,824 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:42,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:43,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:43,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1901861672, now seen corresponding path program 1 times [2021-10-16 02:57:43,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:43,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529494114] [2021-10-16 02:57:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:43,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:43,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:43,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:57:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:57:43,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:57:43,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:43,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529494114] [2021-10-16 02:57:43,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529494114] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:43,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:43,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:57:43,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592045595] [2021-10-16 02:57:43,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:57:43,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:43,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:57:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:57:43,868 INFO L87 Difference]: Start difference. First operand 250 states and 350 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2021-10-16 02:57:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:43,933 INFO L93 Difference]: Finished difference Result 752 states and 1051 transitions. [2021-10-16 02:57:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:57:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 105 [2021-10-16 02:57:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:43,938 INFO L225 Difference]: With dead ends: 752 [2021-10-16 02:57:43,939 INFO L226 Difference]: Without dead ends: 512 [2021-10-16 02:57:43,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:57:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-10-16 02:57:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-10-16 02:57:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.385518590998043) internal successors, (708), 511 states have internal predecessors, (708), 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) [2021-10-16 02:57:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 708 transitions. [2021-10-16 02:57:43,977 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 708 transitions. Word has length 105 [2021-10-16 02:57:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 708 transitions. [2021-10-16 02:57:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2021-10-16 02:57:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 708 transitions. [2021-10-16 02:57:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-16 02:57:43,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:43,987 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:44,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:44,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:44,201 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash 703454395, now seen corresponding path program 1 times [2021-10-16 02:57:44,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:44,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898005431] [2021-10-16 02:57:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:44,202 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:44,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:44,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:57:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:44,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:57:44,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:57:45,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:45,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898005431] [2021-10-16 02:57:45,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898005431] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:45,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:45,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:45,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469351090] [2021-10-16 02:57:45,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:45,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:45,125 INFO L87 Difference]: Start difference. First operand 512 states and 708 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-10-16 02:57:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:45,169 INFO L93 Difference]: Finished difference Result 1035 states and 1430 transitions. [2021-10-16 02:57:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 106 [2021-10-16 02:57:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:45,176 INFO L225 Difference]: With dead ends: 1035 [2021-10-16 02:57:45,176 INFO L226 Difference]: Without dead ends: 533 [2021-10-16 02:57:45,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-10-16 02:57:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2021-10-16 02:57:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.381578947368421) internal successors, (735), 532 states have internal predecessors, (735), 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) [2021-10-16 02:57:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 735 transitions. [2021-10-16 02:57:45,209 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 735 transitions. Word has length 106 [2021-10-16 02:57:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:45,211 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 735 transitions. [2021-10-16 02:57:45,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-10-16 02:57:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 735 transitions. [2021-10-16 02:57:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-16 02:57:45,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:45,214 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:45,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:45,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:45,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 943694141, now seen corresponding path program 1 times [2021-10-16 02:57:45,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:45,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492566451] [2021-10-16 02:57:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:45,431 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:45,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:45,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:45,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:57:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:57:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-16 02:57:46,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-16 02:57:46,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:46,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492566451] [2021-10-16 02:57:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492566451] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:46,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:46,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:57:46,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701621654] [2021-10-16 02:57:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:57:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:57:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:46,464 INFO L87 Difference]: Start difference. First operand 533 states and 735 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-10-16 02:57:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:46,507 INFO L93 Difference]: Finished difference Result 1083 states and 1491 transitions. [2021-10-16 02:57:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:57:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 106 [2021-10-16 02:57:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:46,513 INFO L225 Difference]: With dead ends: 1083 [2021-10-16 02:57:46,514 INFO L226 Difference]: Without dead ends: 560 [2021-10-16 02:57:46,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:57:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-16 02:57:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-10-16 02:57:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.3756708407871199) internal successors, (769), 559 states have internal predecessors, (769), 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) [2021-10-16 02:57:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 769 transitions. [2021-10-16 02:57:46,546 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 769 transitions. Word has length 106 [2021-10-16 02:57:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:46,547 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 769 transitions. [2021-10-16 02:57:46,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-10-16 02:57:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 769 transitions. [2021-10-16 02:57:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-16 02:57:46,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:46,550 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:46,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:46,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:46,766 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:57:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2015927886, now seen corresponding path program 1 times [2021-10-16 02:57:46,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:46,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245973813] [2021-10-16 02:57:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:46,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:46,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:46,769 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:46,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:57:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:57:47,165 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:57:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:57:47,491 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:57:47,491 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:57:47,493 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:57:47,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:47,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:47,717 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:57:47,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:57:47 BoogieIcfgContainer [2021-10-16 02:57:47,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:57:47,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:57:47,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:57:47,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:57:47,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:57:36" (3/4) ... [2021-10-16 02:57:47,859 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:57:47,973 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:57:47,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:57:47,975 INFO L168 Benchmark]: Toolchain (without parser) took 13427.16 ms. Allocated memory was 58.7 MB in the beginning and 92.3 MB in the end (delta: 33.6 MB). Free memory was 36.8 MB in the beginning and 34.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,977 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:57:47,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.32 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.7 MB in the beginning and 54.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.17 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 51.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,978 INFO L168 Benchmark]: Boogie Preprocessor took 107.13 ms. Allocated memory is still 75.5 MB. Free memory was 51.3 MB in the beginning and 49.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,979 INFO L168 Benchmark]: RCFGBuilder took 893.93 ms. Allocated memory is still 75.5 MB. Free memory was 48.9 MB in the beginning and 47.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,979 INFO L168 Benchmark]: TraceAbstraction took 11570.14 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 46.5 MB in the beginning and 46.8 MB in the end (delta: -324.8 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,980 INFO L168 Benchmark]: Witness Printer took 117.18 ms. Allocated memory is still 92.3 MB. Free memory was 46.8 MB in the beginning and 34.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:57:47,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 622.32 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.7 MB in the beginning and 54.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.17 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 51.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 107.13 ms. Allocated memory is still 75.5 MB. Free memory was 51.3 MB in the beginning and 49.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 893.93 ms. Allocated memory is still 75.5 MB. Free memory was 48.9 MB in the beginning and 47.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11570.14 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 46.5 MB in the beginning and 46.8 MB in the end (delta: -324.8 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 117.18 ms. Allocated memory is still 92.3 MB. Free memory was 46.8 MB in the beginning and 34.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 585]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L590] int s ; [L594] s = 12292 [L24] int s__info_callback = __VERIFIER_nondet_int() ; [L25] int s__in_handshake = __VERIFIER_nondet_int() ; [L26] int s__state ; [L27] int s__new_session ; [L28] int s__server ; [L29] int s__version = __VERIFIER_nondet_int() ; [L30] int s__type ; [L31] int s__init_num ; [L32] int s__bbio = __VERIFIER_nondet_int() ; [L33] int s__wbio = __VERIFIER_nondet_int() ; [L34] int s__hit = __VERIFIER_nondet_int() ; [L35] int s__rwstate ; [L36] int s__init_buf___0 = __VERIFIER_nondet_int() ; [L37] int s__debug = __VERIFIER_nondet_int() ; [L38] int s__shutdown ; [L39] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L40] int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_int() ; [L41] int s__ctx__stats__sess_connect = __VERIFIER_nondet_int() ; [L42] int s__ctx__stats__sess_hit = __VERIFIER_nondet_int() ; [L43] int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_int() ; [L44] int s__s3__change_cipher_spec ; [L45] int s__s3__flags = __VERIFIER_nondet_int() ; [L46] int s__s3__delay_buf_pop_ret ; [L47] int s__s3__tmp__cert_req = __VERIFIER_nondet_int() ; [L48] int s__s3__tmp__new_compression = __VERIFIER_nondet_int() ; [L49] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L50] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L51] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L52] int s__s3__tmp__next_state___0 ; [L53] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int() ; [L54] int s__session__cipher ; [L55] int s__session__compress_meth ; [L56] int buf ; [L57] unsigned long tmp ; [L58] unsigned long l ; [L59] int num1 = __VERIFIER_nondet_int() ; [L60] int cb ; [L61] int ret ; [L62] int new_state ; [L63] int state ; [L64] int skip ; [L65] int tmp___0 ; [L66] int tmp___1 = __VERIFIER_nondet_int() ; [L67] int tmp___2 = __VERIFIER_nondet_int() ; [L68] int tmp___3 = __VERIFIER_nondet_int() ; [L69] int tmp___4 = __VERIFIER_nondet_int() ; [L70] int tmp___5 = __VERIFIER_nondet_int() ; [L71] int tmp___6 = __VERIFIER_nondet_int() ; [L72] int tmp___7 = __VERIFIER_nondet_int() ; [L73] int tmp___8 = __VERIFIER_nondet_int() ; [L74] int tmp___9 = __VERIFIER_nondet_int() ; [L75] int blastFlag ; [L76] int __cil_tmp55 ; [L77] void *__cil_tmp56 ; [L78] unsigned long __cil_tmp57 ; [L79] unsigned long __cil_tmp58 = __VERIFIER_nondet_ulong() ; [L80] void *__cil_tmp59 ; [L81] unsigned long __cil_tmp60 ; [L82] unsigned long __cil_tmp61 ; [L83] unsigned long __cil_tmp62 ; [L84] unsigned long __cil_tmp63 ; [L85] unsigned long __cil_tmp64 ; [L86] long __cil_tmp65 = __VERIFIER_nondet_long() ; [L87] long __cil_tmp66 ; [L88] long __cil_tmp67 ; [L89] long __cil_tmp68 ; [L90] long __cil_tmp69 ; [L91] long __cil_tmp70 = __VERIFIER_nondet_long() ; [L92] long __cil_tmp71 ; [L93] long __cil_tmp72 ; [L94] long __cil_tmp73 ; [L95] long __cil_tmp74 ; [L99] s__state = initial_state [L100] blastFlag = 0 [L101] tmp = __VERIFIER_nondet_int() [L102] cb = 0 [L103] ret = -1 [L104] skip = 0 [L105] tmp___0 = 0 [L106] COND TRUE s__info_callback != 0 [L107] cb = s__info_callback [L113] s__in_handshake ++ [L114] COND FALSE !(tmp___1 + 12288) [L120] COND TRUE 1 [L122] state = s__state [L123] COND TRUE s__state == 12292 [L225] s__new_session = 1 [L226] s__state = 4096 [L227] s__ctx__stats__sess_connect_renegotiate ++ [L232] s__server = 0 [L233] COND TRUE cb != 0 [L237] __cil_tmp55 = s__version + 65280 [L238] COND FALSE !(__cil_tmp55 != 768) [L243] s__type = 4096 [L245] __cil_tmp56 = (void *)0 [L246] __cil_tmp57 = (unsigned long )__cil_tmp56 [L247] __cil_tmp58 = (unsigned long )s__init_buf___0 [L248] COND FALSE !(__cil_tmp58 == __cil_tmp57) [L266] COND FALSE !(! tmp___4) [L270] COND FALSE !(! tmp___5) [L274] s__state = 4368 [L275] s__ctx__stats__sess_connect ++ [L276] s__init_num = 0 [L557] COND FALSE !(! s__s3__tmp__reuse_message) [L574] skip = 0 [L120] COND TRUE 1 [L122] state = s__state [L123] COND FALSE !(s__state == 12292) [L126] COND FALSE !(s__state == 16384) [L129] COND FALSE !(s__state == 4096) [L132] COND FALSE !(s__state == 20480) [L135] COND FALSE !(s__state == 4099) [L138] COND TRUE s__state == 4368 [L280] s__shutdown = 0 [L281] ret = __VERIFIER_nondet_int() [L282] COND TRUE blastFlag == 0 [L283] blastFlag = 1 [L285] COND FALSE !(ret <= 0) [L288] s__state = 4384 [L289] s__init_num = 0 [L291] __cil_tmp62 = (unsigned long )s__wbio [L292] __cil_tmp63 = (unsigned long )s__bbio [L293] COND TRUE __cil_tmp63 != __cil_tmp62 [L557] COND FALSE !(! s__s3__tmp__reuse_message) [L574] skip = 0 [L120] COND TRUE 1 [L122] state = s__state [L123] COND FALSE !(s__state == 12292) [L126] COND FALSE !(s__state == 16384) [L129] COND FALSE !(s__state == 4096) [L132] COND FALSE !(s__state == 20480) [L135] COND FALSE !(s__state == 4099) [L138] COND FALSE !(s__state == 4368) [L141] COND FALSE !(s__state == 4369) [L144] COND TRUE s__state == 4384 [L300] ret = __VERIFIER_nondet_int() [L301] COND TRUE blastFlag == 1 [L302] blastFlag = 2 [L308] COND FALSE !(ret <= 0) [L311] COND FALSE !(\read(s__hit)) [L314] s__state = 4400 [L316] s__init_num = 0 [L557] COND FALSE !(! s__s3__tmp__reuse_message) [L574] skip = 0 [L120] COND TRUE 1 [L122] state = s__state [L123] COND FALSE !(s__state == 12292) [L126] COND FALSE !(s__state == 16384) [L129] COND FALSE !(s__state == 4096) [L132] COND FALSE !(s__state == 20480) [L135] COND FALSE !(s__state == 4099) [L138] COND FALSE !(s__state == 4368) [L141] COND FALSE !(s__state == 4369) [L144] COND FALSE !(s__state == 4384) [L147] COND FALSE !(s__state == 4385) [L150] COND TRUE s__state == 4400 [L321] __cil_tmp64 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L322] COND FALSE !(__cil_tmp64 + 256UL) [L325] ret = __VERIFIER_nondet_int() [L326] COND TRUE blastFlag == 2 [L327] blastFlag = 3 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4416 [L335] s__init_num = 0 [L557] COND FALSE !(! s__s3__tmp__reuse_message) [L574] skip = 0 [L120] COND TRUE 1 [L122] state = s__state [L123] COND FALSE !(s__state == 12292) [L126] COND FALSE !(s__state == 16384) [L129] COND FALSE !(s__state == 4096) [L132] COND FALSE !(s__state == 20480) [L135] COND FALSE !(s__state == 4099) [L138] COND FALSE !(s__state == 4368) [L141] COND FALSE !(s__state == 4369) [L144] COND FALSE !(s__state == 4384) [L147] COND FALSE !(s__state == 4385) [L150] COND FALSE !(s__state == 4400) [L153] COND FALSE !(s__state == 4401) [L156] COND TRUE s__state == 4416 [L339] ret = __VERIFIER_nondet_int() [L340] COND TRUE blastFlag == 3 [L341] blastFlag = 4 [L343] COND FALSE !(ret <= 0) [L346] s__state = 4432 [L347] s__init_num = 0 [L348] COND FALSE !(! tmp___6) [L557] COND FALSE !(! s__s3__tmp__reuse_message) [L574] skip = 0 [L120] COND TRUE 1 [L122] state = s__state [L123] COND FALSE !(s__state == 12292) [L126] COND FALSE !(s__state == 16384) [L129] COND FALSE !(s__state == 4096) [L132] COND FALSE !(s__state == 20480) [L135] COND FALSE !(s__state == 4099) [L138] COND FALSE !(s__state == 4368) [L141] COND FALSE !(s__state == 4369) [L144] COND FALSE !(s__state == 4384) [L147] COND FALSE !(s__state == 4385) [L150] COND FALSE !(s__state == 4400) [L153] COND FALSE !(s__state == 4401) [L156] COND FALSE !(s__state == 4416) [L159] COND FALSE !(s__state == 4417) [L162] COND TRUE s__state == 4432 [L355] ret = __VERIFIER_nondet_int() [L356] COND TRUE blastFlag == 4 [L585] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 128 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11332.3ms, OverallIterations: 10, TraceHistogramMax: 6, EmptinessCheckTime: 73.6ms, AutomataDifference: 1565.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1579 SDtfs, 605 SDslu, 1027 SDs, 0 SdLazy, 709 SolverSat, 118 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 887.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1286 GetRequests, 1275 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=560occurred in iteration=9, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 287.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 199.7ms SsaConstructionTime, 438.4ms SatisfiabilityAnalysisTime, 4426.2ms InterpolantComputationTime, 759 NumberOfCodeBlocks, 759 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1979 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1061 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 1172/1172 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! [2021-10-16 02:57:48,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bd684c-46b8-482d-884d-2e8ef0023bdd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...