./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.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_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/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_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/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_ae6e2f41-01b7-483f-be53-59007cfc25be/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 f3536db9699385ffb876a2d41b01ddec88a6e92c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:04:31,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:31,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:31,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:31,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:31,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:31,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:31,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:31,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:31,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:31,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:31,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:31,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:31,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:31,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:31,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:31,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:31,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:31,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:31,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:31,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:31,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:31,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:31,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:31,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:31,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:31,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:31,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:31,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:31,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:31,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:31,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:31,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:31,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:31,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:31,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:31,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:31,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:31,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:31,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:31,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:31,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:04:31,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:31,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:31,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:31,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:31,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:31,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:31,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:04:31,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:31,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:31,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:04:31,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:04:31,987 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:31,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:04:31,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:04:31,987 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:04:31,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:31,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:31,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:04:31,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:31,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:31,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:04:31,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:31,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:04:31,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:31,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:31,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:04:31,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:31,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:04:31,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:31,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:31,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:31,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:31,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:31,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:04:31,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:04:31,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:04:31,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:04:31,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:31,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:31,995 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_ae6e2f41-01b7-483f-be53-59007cfc25be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3536db9699385ffb876a2d41b01ddec88a6e92c [2021-10-16 03:04:32,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:32,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:32,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:32,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:32,304 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:32,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-10-16 03:04:32,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/data/b96bbfe16/20c43fa0bf0d47e4af988c79d199cf06/FLAG9146c513c [2021-10-16 03:04:32,866 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:32,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-10-16 03:04:32,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/data/b96bbfe16/20c43fa0bf0d47e4af988c79d199cf06/FLAG9146c513c [2021-10-16 03:04:33,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/data/b96bbfe16/20c43fa0bf0d47e4af988c79d199cf06 [2021-10-16 03:04:33,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:33,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:33,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:33,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:33,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:33,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60daddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33, skipping insertion in model container [2021-10-16 03:04:33,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:33,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:33,509 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_ae6e2f41-01b7-483f-be53-59007cfc25be/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[45163,45176] [2021-10-16 03:04:33,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:33,525 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:33,581 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_ae6e2f41-01b7-483f-be53-59007cfc25be/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[45163,45176] [2021-10-16 03:04:33,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:33,598 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:33,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33 WrapperNode [2021-10-16 03:04:33,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:33,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:33,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:33,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:33,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:33,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:33,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:33,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:33,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:33,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:33,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:33,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:33,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (1/1) ... [2021-10-16 03:04:33,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:33,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:33,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:33,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:04:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:33,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:33,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:33,974 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 03:04:34,555 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-16 03:04:34,562 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-16 03:04:34,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:34,982 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 03:04:34,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:34 BoogieIcfgContainer [2021-10-16 03:04:34,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:34,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:34,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:34,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:34,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:33" (1/3) ... [2021-10-16 03:04:34,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e744e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:34, skipping insertion in model container [2021-10-16 03:04:34,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:33" (2/3) ... [2021-10-16 03:04:34,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e744e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:34, skipping insertion in model container [2021-10-16 03:04:34,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:34" (3/3) ... [2021-10-16 03:04:34,995 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2021-10-16 03:04:35,001 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:35,001 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:04:35,063 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:35,072 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 03:04:35,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:04:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.7818181818181817) internal successors, (196), 111 states have internal predecessors, (196), 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 03:04:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 03:04:35,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:35,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:35,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash 583561461, now seen corresponding path program 1 times [2021-10-16 03:04:35,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:35,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299029759] [2021-10-16 03:04:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:35,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:35,324 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 03:04:35,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:35,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299029759] [2021-10-16 03:04:35,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299029759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:35,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:35,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:35,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657698065] [2021-10-16 03:04:35,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:35,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:35,350 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.7818181818181817) internal successors, (196), 111 states have internal predecessors, (196), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:35,583 INFO L93 Difference]: Finished difference Result 249 states and 434 transitions. [2021-10-16 03:04:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:35,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 03:04:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:35,600 INFO L225 Difference]: With dead ends: 249 [2021-10-16 03:04:35,600 INFO L226 Difference]: Without dead ends: 133 [2021-10-16 03:04:35,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-16 03:04:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-10-16 03:04:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.5078125) internal successors, (193), 128 states have internal predecessors, (193), 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 03:04:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 193 transitions. [2021-10-16 03:04:35,653 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 193 transitions. Word has length 16 [2021-10-16 03:04:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:35,653 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 193 transitions. [2021-10-16 03:04:35,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 193 transitions. [2021-10-16 03:04:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:04:35,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:35,655 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] [2021-10-16 03:04:35,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:04:35,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1568848935, now seen corresponding path program 1 times [2021-10-16 03:04:35,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:35,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900293352] [2021-10-16 03:04:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:35,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:35,756 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 03:04:35,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:35,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900293352] [2021-10-16 03:04:35,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900293352] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:35,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:35,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:35,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958526619] [2021-10-16 03:04:35,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:35,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:35,762 INFO L87 Difference]: Start difference. First operand 129 states and 193 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 03:04:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:35,916 INFO L93 Difference]: Finished difference Result 148 states and 217 transitions. [2021-10-16 03:04:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2021-10-16 03:04:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:35,925 INFO L225 Difference]: With dead ends: 148 [2021-10-16 03:04:35,925 INFO L226 Difference]: Without dead ends: 146 [2021-10-16 03:04:35,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-16 03:04:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2021-10-16 03:04:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.5147058823529411) internal successors, (206), 136 states have internal predecessors, (206), 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 03:04:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 206 transitions. [2021-10-16 03:04:35,950 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 206 transitions. Word has length 21 [2021-10-16 03:04:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:35,950 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 206 transitions. [2021-10-16 03:04:35,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 03:04:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 206 transitions. [2021-10-16 03:04:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 03:04:35,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:35,952 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, 1, 1] [2021-10-16 03:04:35,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:04:35,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1478041189, now seen corresponding path program 1 times [2021-10-16 03:04:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:35,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008376202] [2021-10-16 03:04:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:35,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,023 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 03:04:36,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008376202] [2021-10-16 03:04:36,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008376202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:36,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977699401] [2021-10-16 03:04:36,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,027 INFO L87 Difference]: Start difference. First operand 137 states and 206 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 03:04:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,037 INFO L93 Difference]: Finished difference Result 272 states and 410 transitions. [2021-10-16 03:04:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-10-16 03:04:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,041 INFO L225 Difference]: With dead ends: 272 [2021-10-16 03:04:36,041 INFO L226 Difference]: Without dead ends: 137 [2021-10-16 03:04:36,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-16 03:04:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-16 03:04:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4926470588235294) internal successors, (203), 136 states have internal predecessors, (203), 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 03:04:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 203 transitions. [2021-10-16 03:04:36,054 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 203 transitions. Word has length 30 [2021-10-16 03:04:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,055 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 203 transitions. [2021-10-16 03:04:36,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 03:04:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 203 transitions. [2021-10-16 03:04:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 03:04:36,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,058 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] [2021-10-16 03:04:36,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:04:36,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash -710152496, now seen corresponding path program 1 times [2021-10-16 03:04:36,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999435320] [2021-10-16 03:04:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999435320] [2021-10-16 03:04:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999435320] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:36,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590319653] [2021-10-16 03:04:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,121 INFO L87 Difference]: Start difference. First operand 137 states and 203 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 03:04:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,149 INFO L93 Difference]: Finished difference Result 277 states and 410 transitions. [2021-10-16 03:04:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 31 [2021-10-16 03:04:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,151 INFO L225 Difference]: With dead ends: 277 [2021-10-16 03:04:36,151 INFO L226 Difference]: Without dead ends: 142 [2021-10-16 03:04:36,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-16 03:04:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-10-16 03:04:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4642857142857142) internal successors, (205), 140 states have internal predecessors, (205), 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 03:04:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2021-10-16 03:04:36,180 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 31 [2021-10-16 03:04:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,182 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2021-10-16 03:04:36,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 03:04:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2021-10-16 03:04:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 03:04:36,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,185 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-16 03:04:36,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:04:36,186 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1586002108, now seen corresponding path program 1 times [2021-10-16 03:04:36,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28093695] [2021-10-16 03:04:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28093695] [2021-10-16 03:04:36,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28093695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:36,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134143867] [2021-10-16 03:04:36,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,311 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 03:04:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,332 INFO L93 Difference]: Finished difference Result 410 states and 595 transitions. [2021-10-16 03:04:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2021-10-16 03:04:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,335 INFO L225 Difference]: With dead ends: 410 [2021-10-16 03:04:36,335 INFO L226 Difference]: Without dead ends: 271 [2021-10-16 03:04:36,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 03:04:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-16 03:04:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2021-10-16 03:04:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.456273764258555) internal successors, (383), 263 states have internal predecessors, (383), 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 03:04:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 383 transitions. [2021-10-16 03:04:36,351 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 383 transitions. Word has length 34 [2021-10-16 03:04:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,352 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 383 transitions. [2021-10-16 03:04:36,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 03:04:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 383 transitions. [2021-10-16 03:04:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 03:04:36,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,354 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-16 03:04:36,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:04:36,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1694394513, now seen corresponding path program 1 times [2021-10-16 03:04:36,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667908258] [2021-10-16 03:04:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667908258] [2021-10-16 03:04:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667908258] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:36,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439444829] [2021-10-16 03:04:36,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,394 INFO L87 Difference]: Start difference. First operand 264 states and 383 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 03:04:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,618 INFO L93 Difference]: Finished difference Result 635 states and 948 transitions. [2021-10-16 03:04:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2021-10-16 03:04:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,621 INFO L225 Difference]: With dead ends: 635 [2021-10-16 03:04:36,621 INFO L226 Difference]: Without dead ends: 349 [2021-10-16 03:04:36,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-10-16 03:04:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2021-10-16 03:04:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.423529411764706) internal successors, (484), 340 states have internal predecessors, (484), 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 03:04:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 484 transitions. [2021-10-16 03:04:36,637 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 484 transitions. Word has length 35 [2021-10-16 03:04:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,637 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 484 transitions. [2021-10-16 03:04:36,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 03:04:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 484 transitions. [2021-10-16 03:04:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:04:36,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,640 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-10-16 03:04:36,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:04:36,640 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash -59281900, now seen corresponding path program 1 times [2021-10-16 03:04:36,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564723705] [2021-10-16 03:04:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564723705] [2021-10-16 03:04:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564723705] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446166235] [2021-10-16 03:04:36,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,682 INFO L87 Difference]: Start difference. First operand 341 states and 484 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 03:04:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,907 INFO L93 Difference]: Finished difference Result 834 states and 1214 transitions. [2021-10-16 03:04:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,908 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 38 [2021-10-16 03:04:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,912 INFO L225 Difference]: With dead ends: 834 [2021-10-16 03:04:36,912 INFO L226 Difference]: Without dead ends: 475 [2021-10-16 03:04:36,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-10-16 03:04:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 447. [2021-10-16 03:04:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.405829596412556) internal successors, (627), 446 states have internal predecessors, (627), 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 03:04:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 627 transitions. [2021-10-16 03:04:36,947 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 627 transitions. Word has length 38 [2021-10-16 03:04:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 627 transitions. [2021-10-16 03:04:36,949 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 03:04:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 627 transitions. [2021-10-16 03:04:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-16 03:04:36,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,953 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-10-16 03:04:36,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 03:04:36,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1167120788, now seen corresponding path program 1 times [2021-10-16 03:04:36,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285578404] [2021-10-16 03:04:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:37,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:37,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285578404] [2021-10-16 03:04:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285578404] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:37,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:37,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:37,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150957851] [2021-10-16 03:04:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:37,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:37,048 INFO L87 Difference]: Start difference. First operand 447 states and 627 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 03:04:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:37,085 INFO L93 Difference]: Finished difference Result 1331 states and 1866 transitions. [2021-10-16 03:04:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2021-10-16 03:04:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:37,092 INFO L225 Difference]: With dead ends: 1331 [2021-10-16 03:04:37,092 INFO L226 Difference]: Without dead ends: 886 [2021-10-16 03:04:37,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-10-16 03:04:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 667. [2021-10-16 03:04:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.4039039039039038) internal successors, (935), 666 states have internal predecessors, (935), 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 03:04:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 935 transitions. [2021-10-16 03:04:37,130 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 935 transitions. Word has length 44 [2021-10-16 03:04:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:37,130 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 935 transitions. [2021-10-16 03:04:37,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 03:04:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 935 transitions. [2021-10-16 03:04:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 03:04:37,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:37,133 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:37,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 03:04:37,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1527396288, now seen corresponding path program 1 times [2021-10-16 03:04:37,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:37,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321069041] [2021-10-16 03:04:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:37,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:04:37,164 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:04:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:04:37,243 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 03:04:37,246 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:04:37,247 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:04:37,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 03:04:37,255 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:04:37,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:04:37 BoogieIcfgContainer [2021-10-16 03:04:37,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:04:37,342 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:04:37,342 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:04:37,342 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:04:37,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:34" (3/4) ... [2021-10-16 03:04:37,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:04:37,469 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:04:37,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:04:37,471 INFO L168 Benchmark]: Toolchain (without parser) took 4255.27 ms. Allocated memory was 90.2 MB in the beginning and 151.0 MB in the end (delta: 60.8 MB). Free memory was 52.5 MB in the beginning and 68.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,471 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:37,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.11 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 52.3 MB in the beginning and 82.5 MB in the end (delta: -30.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.18 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 79.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,472 INFO L168 Benchmark]: Boogie Preprocessor took 60.34 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 77.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,473 INFO L168 Benchmark]: RCFGBuilder took 1260.74 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 63.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,473 INFO L168 Benchmark]: TraceAbstraction took 2354.40 ms. Allocated memory was 111.1 MB in the beginning and 151.0 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 77.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,474 INFO L168 Benchmark]: Witness Printer took 127.62 ms. Allocated memory is still 151.0 MB. Free memory was 77.2 MB in the beginning and 69.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.11 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 52.3 MB in the beginning and 82.5 MB in the end (delta: -30.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.18 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 79.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.34 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 77.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1260.74 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 63.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2354.40 ms. Allocated memory was 111.1 MB in the beginning and 151.0 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 77.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 16.1 GB. * Witness Printer took 127.62 ms. Allocated memory is still 151.0 MB. Free memory was 77.2 MB in the beginning and 69.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 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: 652]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L657] int s ; [L658] int tmp ; [L662] s = 8464 [L23] int s__info_callback = __VERIFIER_nondet_int() ; [L24] int s__in_handshake = __VERIFIER_nondet_int() ; [L25] int s__state ; [L26] int s__new_session ; [L27] int s__server ; [L28] int s__version = __VERIFIER_nondet_int() ; [L29] int s__type ; [L30] int s__init_num ; [L31] int s__hit = __VERIFIER_nondet_int() ; [L32] int s__rwstate ; [L33] int s__init_buf___0 = 1; [L34] int s__debug = __VERIFIER_nondet_int() ; [L35] int s__shutdown ; [L36] int s__cert = __VERIFIER_nondet_int() ; [L37] int s__options = __VERIFIER_nondet_int() ; [L38] int s__verify_mode = __VERIFIER_nondet_int() ; [L39] int s__session__peer = __VERIFIER_nondet_int() ; [L40] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L41] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L42] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L43] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L44] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L45] int s__s3__tmp__cert_request ; [L46] int s__s3__tmp__reuse_message ; [L47] int s__s3__tmp__use_rsa_tmp ; [L48] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L49] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L50] int s__s3__tmp__next_state___0 ; [L51] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L52] int s__session__cipher ; [L53] int buf ; [L54] unsigned long l ; [L55] unsigned long Time ; [L56] unsigned long tmp ; [L57] int cb ; [L58] long num1 = __VERIFIER_nondet_long() ; [L59] int ret ; [L60] int new_state ; [L61] int state ; [L62] int skip ; [L63] int got_new_session ; [L64] int tmp___1 = __VERIFIER_nondet_int() ; [L65] int tmp___2 = __VERIFIER_nondet_int() ; [L66] int tmp___3 = __VERIFIER_nondet_int() ; [L67] int tmp___4 = __VERIFIER_nondet_int() ; [L68] int tmp___5 = __VERIFIER_nondet_int() ; [L69] int tmp___6 = __VERIFIER_nondet_int() ; [L70] int tmp___7 ; [L71] long tmp___8 = __VERIFIER_nondet_long() ; [L72] int tmp___9 = __VERIFIER_nondet_int() ; [L73] int tmp___10 = __VERIFIER_nondet_int() ; [L74] int blastFlag ; [L75] int __cil_tmp55 ; [L76] unsigned long __cil_tmp56 ; [L77] unsigned long __cil_tmp57 ; [L78] unsigned long __cil_tmp58 ; [L79] unsigned long __cil_tmp59 ; [L80] int __cil_tmp60 ; [L81] unsigned long __cil_tmp61 ; [L84] s__s3__tmp__reuse_message = 0 [L85] s__state = initial_state [L86] blastFlag = 0 [L87] tmp = __VERIFIER_nondet_int() [L88] Time = tmp [L89] cb = 0 [L90] ret = -1 [L91] skip = 0 [L92] got_new_session = 0 [L93] COND FALSE !(s__info_callback != 0) [L96] COND FALSE !(s__ctx__info_callback != 0) [L100] s__in_handshake ++ [L101] COND TRUE tmp___1 + 12288 [L102] COND TRUE tmp___2 + 16384 [L106] COND FALSE !(s__cert == 0) [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND TRUE s__state == 8464 [L283] s__shutdown = 0 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 0 [L286] blastFlag = 1 [L288] COND FALSE !(ret <= 0) [L291] got_new_session = 1 [L292] s__state = 8496 [L293] s__init_num = 0 [L614] COND TRUE ! s__s3__tmp__reuse_message [L615] COND TRUE ! skip [L616] COND TRUE tmp___1 != -12288 [L617] COND TRUE s__state != 8656 [L618] COND TRUE tmp___2 != -16384 [L619] COND FALSE !(state == 8496) [L626] COND FALSE !(\read(s__debug)) [L632] COND FALSE !(cb != 0) [L641] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND TRUE s__state == 8496 [L297] ret = __VERIFIER_nondet_int() [L298] COND TRUE blastFlag == 1 [L299] blastFlag = 2 [L301] COND FALSE !(ret <= 0) [L304] COND FALSE !(\read(s__hit)) [L307] s__state = 8512 [L309] s__init_num = 0 [L614] COND TRUE ! s__s3__tmp__reuse_message [L615] COND TRUE ! skip [L616] COND TRUE tmp___1 != -12288 [L617] COND TRUE s__state != 8656 [L618] COND TRUE tmp___2 != -16384 [L619] COND TRUE state == 8496 [L652] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2191.7ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 25.0ms, AutomataDifference: 1020.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1438 SDtfs, 831 SDslu, 767 SDs, 0 SdLazy, 474 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 541.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=667occurred in iteration=8, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 190.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 276 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.0ms SsaConstructionTime, 212.6ms SatisfiabilityAnalysisTime, 392.7ms InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 525 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 45/45 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 03:04:37,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e2f41-01b7-483f-be53-59007cfc25be/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...