./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8 --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 9738a6698dfc65e1ff903e1e31cda8a1b59d676d .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8 --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 9738a6698dfc65e1ff903e1e31cda8a1b59d676d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 07:16:55,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:16:55,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:16:55,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:16:55,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:16:55,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:16:55,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:16:55,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:16:55,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:16:55,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:16:55,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:16:55,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:16:55,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:16:55,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:16:55,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:16:55,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:16:55,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:16:55,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:16:55,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:16:55,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:16:55,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:16:55,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:16:55,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:16:55,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:16:55,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:16:55,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:16:55,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:16:55,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:16:55,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:16:55,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:16:55,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:16:55,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:16:55,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:16:55,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:16:55,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:16:55,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:16:55,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:16:55,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:16:55,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:16:55,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:16:55,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:16:55,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:16:55,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:16:55,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:16:55,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:16:55,553 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:16:55,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:16:55,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:16:55,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:16:55,554 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:16:55,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:16:55,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:16:55,562 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:16:55,562 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:16:55,563 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:16:55,563 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:16:55,563 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:16:55,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:16:55,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:16:55,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:16:55,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:16:55,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:16:55,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:16:55,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:16:55,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:16:55,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:16:55,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:16:55,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:16:55,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:16:55,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:16:55,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:16:55,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:16:55,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:55,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:16:55,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:16:55,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:16:55,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:16:55,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:16:55,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:16:55,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:16:55,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:16:55,570 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9738a6698dfc65e1ff903e1e31cda8a1b59d676d [2021-10-13 07:16:55,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:16:55,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:16:55,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:16:55,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:16:55,885 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:16:55,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:16:55,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/f6776e403/61f03c0a4bed4ba8aa3e3e4125e7476a/FLAG2d43a6ff3 [2021-10-13 07:16:56,515 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:16:56,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:16:56,532 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/f6776e403/61f03c0a4bed4ba8aa3e3e4125e7476a/FLAG2d43a6ff3 [2021-10-13 07:16:56,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/f6776e403/61f03c0a4bed4ba8aa3e3e4125e7476a [2021-10-13 07:16:56,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:16:56,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:16:56,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:56,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:16:56,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:16:56,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:56" (1/1) ... [2021-10-13 07:16:56,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6c08d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:56, skipping insertion in model container [2021-10-13 07:16:56,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:56" (1/1) ... [2021-10-13 07:16:56,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:16:56,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:57,243 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-13 07:16:57,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:57,265 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:16:57,336 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-13 07:16:57,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:57,358 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:16:57,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57 WrapperNode [2021-10-13 07:16:57,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:57,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:57,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:16:57,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:16:57,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:57,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:16:57,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:16:57,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:16:57,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:16:57,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:16:57,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:16:57,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:16:57,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (1/1) ... [2021-10-13 07:16:57,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:57,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:16:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:16:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:16:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:16:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:16:57,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:16:57,706 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 07:16:58,182 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2021-10-13 07:16:58,182 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2021-10-13 07:16:58,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:16:58,697 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:16:58,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:58 BoogieIcfgContainer [2021-10-13 07:16:58,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:16:58,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:16:58,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:16:58,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:16:58,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:56" (1/3) ... [2021-10-13 07:16:58,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4edfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:58, skipping insertion in model container [2021-10-13 07:16:58,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:57" (2/3) ... [2021-10-13 07:16:58,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4edfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:58, skipping insertion in model container [2021-10-13 07:16:58,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:58" (3/3) ... [2021-10-13 07:16:58,712 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:16:58,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:16:58,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:16:58,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:16:58,774 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 [2021-10-13 07:16:58,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:16:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 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) [2021-10-13 07:16:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:16:58,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:58,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:58,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1895066675, now seen corresponding path program 1 times [2021-10-13 07:16:58,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:16:58,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490070037] [2021-10-13 07:16:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:58,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:16:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:59,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:16:59,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490070037] [2021-10-13 07:16:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490070037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:59,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:59,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:16:59,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362469493] [2021-10-13 07:16:59,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:59,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:16:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:59,106 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 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) [2021-10-13 07:16:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:59,282 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2021-10-13 07:16:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:59,284 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 [2021-10-13 07:16:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:59,295 INFO L225 Difference]: With dead ends: 169 [2021-10-13 07:16:59,296 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:16:59,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:16:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-13 07:16:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 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) [2021-10-13 07:16:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2021-10-13 07:16:59,343 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2021-10-13 07:16:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:59,343 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2021-10-13 07:16:59,344 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) [2021-10-13 07:16:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2021-10-13 07:16:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:16:59,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:59,346 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] [2021-10-13 07:16:59,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:16:59,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash 9926788, now seen corresponding path program 1 times [2021-10-13 07:16:59,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:16:59,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830370701] [2021-10-13 07:16:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:59,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:16:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:59,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:16:59,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830370701] [2021-10-13 07:16:59,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830370701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:59,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:59,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:16:59,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875317745] [2021-10-13 07:16:59,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:59,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:16:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:59,426 INFO L87 Difference]: Start difference. First operand 83 states and 120 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) [2021-10-13 07:16:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:59,589 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2021-10-13 07:16:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:59,590 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 [2021-10-13 07:16:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:59,596 INFO L225 Difference]: With dead ends: 178 [2021-10-13 07:16:59,596 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 07:16:59,599 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 [2021-10-13 07:16:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 07:16:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-13 07:16:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.431578947368421) internal successors, (136), 95 states have internal predecessors, (136), 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) [2021-10-13 07:16:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-10-13 07:16:59,614 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2021-10-13 07:16:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:59,614 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-10-13 07:16:59,614 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) [2021-10-13 07:16:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-10-13 07:16:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 07:16:59,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:59,616 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] [2021-10-13 07:16:59,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:16:59,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash 926223436, now seen corresponding path program 1 times [2021-10-13 07:16:59,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:16:59,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549744383] [2021-10-13 07:16:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:59,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:16:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:16:59,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:16:59,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549744383] [2021-10-13 07:16:59,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549744383] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:59,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:59,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:16:59,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878646316] [2021-10-13 07:16:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:16:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:59,689 INFO L87 Difference]: Start difference. First operand 96 states and 136 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) [2021-10-13 07:16:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:59,833 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2021-10-13 07:16:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:59,834 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 [2021-10-13 07:16:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:59,836 INFO L225 Difference]: With dead ends: 206 [2021-10-13 07:16:59,837 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:16:59,838 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 [2021-10-13 07:16:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:16:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-10-13 07:16:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4) internal successors, (154), 110 states have internal predecessors, (154), 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) [2021-10-13 07:16:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2021-10-13 07:16:59,856 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2021-10-13 07:16:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:59,857 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2021-10-13 07:16:59,858 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) [2021-10-13 07:16:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2021-10-13 07:16:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:16:59,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:59,869 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] [2021-10-13 07:16:59,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:16:59,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1745436620, now seen corresponding path program 1 times [2021-10-13 07:16:59,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:16:59,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026786100] [2021-10-13 07:16:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:59,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:16:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:59,967 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:17:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:00,066 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:17:00,066 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:17:00,068 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:17:00,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:17:00,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:17:00,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:00 BoogieIcfgContainer [2021-10-13 07:17:00,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:17:00,206 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:17:00,206 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:17:00,207 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:17:00,207 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:58" (3/4) ... [2021-10-13 07:17:00,211 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:17:00,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:17:00,214 INFO L168 Benchmark]: Toolchain (without parser) took 3344.60 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 48.5 MB in the beginning and 86.8 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:00,214 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory is still 65.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:00,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.45 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 48.3 MB in the beginning and 89.2 MB in the end (delta: -40.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:00,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.71 ms. Allocated memory is still 117.4 MB. Free memory was 89.0 MB in the beginning and 86.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:00,217 INFO L168 Benchmark]: Boogie Preprocessor took 72.57 ms. Allocated memory is still 117.4 MB. Free memory was 86.4 MB in the beginning and 84.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:00,218 INFO L168 Benchmark]: RCFGBuilder took 1192.12 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 59.8 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:00,219 INFO L168 Benchmark]: TraceAbstraction took 1503.72 ms. Allocated memory is still 117.4 MB. Free memory was 59.2 MB in the beginning and 87.6 MB in the end (delta: -28.5 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:00,220 INFO L168 Benchmark]: Witness Printer took 5.14 ms. Allocated memory is still 117.4 MB. Free memory was 87.6 MB in the beginning and 86.8 MB in the end (delta: 809.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:00,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory is still 65.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 489.45 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 48.3 MB in the beginning and 89.2 MB in the end (delta: -40.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.71 ms. Allocated memory is still 117.4 MB. Free memory was 89.0 MB in the beginning and 86.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.57 ms. Allocated memory is still 117.4 MB. Free memory was 86.4 MB in the beginning and 84.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1192.12 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 59.8 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1503.72 ms. Allocated memory is still 117.4 MB. Free memory was 59.2 MB in the beginning and 87.6 MB in the end (delta: -28.5 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.14 ms. Allocated memory is still 117.4 MB. Free memory was 87.6 MB in the beginning and 86.8 MB in the end (delta: 809.9 kB). There was no memory consumed. 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 - UnprovableResult [Line: 616]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 303. Possible FailurePath: [L625] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y ; [L65] int ag_Z ; [L66] int __retres60 ; [L69] s__state = 12292 [L70] blastFlag = 0 [L71] tmp = __VERIFIER_nondet_int() [L72] cb = 0 [L73] ret = -1 [L74] skip = 0 [L75] tmp___0 = 0 [L76] COND FALSE !(s__info_callback != 0) [L79] COND FALSE !(s__ctx__info_callback != 0) [L85] s__in_handshake = s__in_handshake + 1 [L86] COND FALSE !(tmp___1 + 12288) [L95] COND TRUE \read(s__hit) [L96] ag_Y = 208 [L101] COND TRUE 1 [L103] state = s__state [L104] COND TRUE s__state == 12292 [L207] s__new_session = 1 [L208] s__state = 4096 [L209] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L214] s__server = 0 [L215] COND FALSE !(cb != 0) [L220] COND FALSE !(s__version + 65280 != 768) [L226] s__type = 4096 [L227] COND FALSE !((unsigned long )s__init_buf___0 == (unsigned long )((void *)0)) [L245] COND FALSE !(! tmp___4) [L251] COND FALSE !(! tmp___5) [L257] s__state = 4368 [L258] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L259] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND TRUE s__state == 4368 [L263] s__shutdown = 0 [L264] ret = __VERIFIER_nondet_int() [L265] COND TRUE blastFlag == 0 [L266] blastFlag = 1 [L270] COND FALSE !(ret <= 0) [L275] s__state = 4384 [L276] ag_X = s__state - 32 [L277] s__init_num = 0 [L278] COND FALSE !((unsigned long )s__bbio != (unsigned long )s__wbio) [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND TRUE s__state == 4384 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L296] COND FALSE !(ret <= 0) [L301] s__state = ag_X [L302] COND TRUE \read(s__hit) [L303] s__state = s__state | ag_Y [L307] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND FALSE !(s__state == 4416) [L140] COND FALSE !(s__state == 4417) [L143] COND TRUE s__state == 4432 [L353] ret = __VERIFIER_nondet_int() [L354] COND TRUE blastFlag <= 5 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1309.3ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 23.2ms, AutomataDifference: 543.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 375 SDtfs, 16 SDslu, 138 SDs, 0 SdLazy, 256 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 279.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.3ms SsaConstructionTime, 183.2ms SatisfiabilityAnalysisTime, 196.0ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 127 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 15/15 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 could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:17:00,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 07:17:02,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:17:02,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:17:03,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:17:03,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:17:03,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:17:03,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:17:03,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:17:03,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:17:03,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:17:03,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:17:03,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:17:03,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:17:03,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:17:03,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:17:03,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:17:03,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:17:03,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:17:03,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:17:03,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:17:03,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:17:03,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:17:03,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:17:03,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:17:03,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:17:03,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:17:03,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:17:03,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:17:03,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:17:03,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:17:03,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:17:03,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:17:03,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:17:03,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:17:03,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:17:03,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:17:03,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:17:03,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:17:03,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:17:03,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:17:03,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:17:03,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:17:03,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:17:03,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:17:03,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:17:03,207 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:17:03,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:17:03,208 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:17:03,208 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:17:03,209 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:17:03,209 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:17:03,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:17:03,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:17:03,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:17:03,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:17:03,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:17:03,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:17:03,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:17:03,213 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:17:03,213 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:17:03,214 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:17:03,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:17:03,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:17:03,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:17:03,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:17:03,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:17:03,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:17:03,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:17:03,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:03,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:17:03,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:17:03,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:17:03,216 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:17:03,217 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:03,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:17:03,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:17:03,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:17:03,218 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9738a6698dfc65e1ff903e1e31cda8a1b59d676d [2021-10-13 07:17:03,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:17:03,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:17:03,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:17:03,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:17:03,796 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:17:03,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:17:03,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/6fdb1af17/233a7e12a5654c57a6efaaf507f06bc1/FLAG40d256a28 [2021-10-13 07:17:04,723 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:17:04,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:17:04,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/6fdb1af17/233a7e12a5654c57a6efaaf507f06bc1/FLAG40d256a28 [2021-10-13 07:17:04,974 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/data/6fdb1af17/233a7e12a5654c57a6efaaf507f06bc1 [2021-10-13 07:17:04,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:17:04,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:17:04,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:04,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:17:04,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:17:04,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:04" (1/1) ... [2021-10-13 07:17:04,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380912b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:04, skipping insertion in model container [2021-10-13 07:17:04,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:04" (1/1) ... [2021-10-13 07:17:05,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:17:05,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:17:05,371 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-13 07:17:05,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:05,448 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:17:05,551 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_ee180ed1-bd96-4ac1-8849-4b81c61c3962/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-13 07:17:05,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:05,578 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:17:05,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05 WrapperNode [2021-10-13 07:17:05,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:05,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:05,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:17:05,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:17:05,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:05,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:17:05,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:17:05,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:17:05,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:17:05,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:17:05,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:17:05,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:17:05,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (1/1) ... [2021-10-13 07:17:05,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:05,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:17:05,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:17:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:17:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:17:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:17:05,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:17:06,106 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 07:17:06,874 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2021-10-13 07:17:06,875 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2021-10-13 07:17:06,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:17:06,886 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:17:06,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:06 BoogieIcfgContainer [2021-10-13 07:17:06,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:17:06,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:17:06,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:17:06,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:17:06,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:04" (1/3) ... [2021-10-13 07:17:06,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c33d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:06, skipping insertion in model container [2021-10-13 07:17:06,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:05" (2/3) ... [2021-10-13 07:17:06,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c33d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:06, skipping insertion in model container [2021-10-13 07:17:06,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:06" (3/3) ... [2021-10-13 07:17:06,901 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-2a.c [2021-10-13 07:17:06,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:17:06,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:17:06,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:17:06,983 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 [2021-10-13 07:17:06,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:17:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 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) [2021-10-13 07:17:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:17:07,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:07,019 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, 1] [2021-10-13 07:17:07,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash 259999105, now seen corresponding path program 1 times [2021-10-13 07:17:07,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:07,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79326258] [2021-10-13 07:17:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:07,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:07,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:07,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:17:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:07,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:07,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79326258] [2021-10-13 07:17:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79326258] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:07,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:07,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:07,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966524601] [2021-10-13 07:17:07,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:07,702 INFO L87 Difference]: Start difference. First operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 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 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-13 07:17:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:07,987 INFO L93 Difference]: Finished difference Result 247 states and 423 transitions. [2021-10-13 07:17:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:07,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-10-13 07:17:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:08,006 INFO L225 Difference]: With dead ends: 247 [2021-10-13 07:17:08,007 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:17:08,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:17:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-13 07:17:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.5267857142857142) internal successors, (171), 112 states have internal predecessors, (171), 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) [2021-10-13 07:17:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 171 transitions. [2021-10-13 07:17:08,105 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 171 transitions. Word has length 25 [2021-10-13 07:17:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:08,106 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 171 transitions. [2021-10-13 07:17:08,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-13 07:17:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 171 transitions. [2021-10-13 07:17:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:17:08,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:08,113 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] [2021-10-13 07:17:08,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:08,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:08,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:08,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1138040513, now seen corresponding path program 1 times [2021-10-13 07:17:08,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:08,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102441189] [2021-10-13 07:17:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:08,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:08,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:08,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:17:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:08,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:08,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:08,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102441189] [2021-10-13 07:17:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102441189] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:08,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536606488] [2021-10-13 07:17:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:08,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:08,743 INFO L87 Difference]: Start difference. First operand 113 states and 171 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) [2021-10-13 07:17:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:08,919 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-10-13 07:17:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:08,920 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 [2021-10-13 07:17:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:08,922 INFO L225 Difference]: With dead ends: 233 [2021-10-13 07:17:08,923 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 07:17:08,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 07:17:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-10-13 07:17:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 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) [2021-10-13 07:17:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 191 transitions. [2021-10-13 07:17:08,939 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 191 transitions. Word has length 37 [2021-10-13 07:17:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:08,940 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 191 transitions. [2021-10-13 07:17:08,940 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) [2021-10-13 07:17:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 191 transitions. [2021-10-13 07:17:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:17:08,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:08,944 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] [2021-10-13 07:17:08,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:09,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:09,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1126420040, now seen corresponding path program 1 times [2021-10-13 07:17:09,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:09,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391251566] [2021-10-13 07:17:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:09,162 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:09,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:17:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:09,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:09,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:09,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391251566] [2021-10-13 07:17:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391251566] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:09,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:09,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640063058] [2021-10-13 07:17:09,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:09,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:09,726 INFO L87 Difference]: Start difference. First operand 128 states and 191 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) [2021-10-13 07:17:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:09,775 INFO L93 Difference]: Finished difference Result 271 states and 400 transitions. [2021-10-13 07:17:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:09,776 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 [2021-10-13 07:17:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:09,801 INFO L225 Difference]: With dead ends: 271 [2021-10-13 07:17:09,802 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 07:17:09,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 07:17:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-10-13 07:17:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 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) [2021-10-13 07:17:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 224 transitions. [2021-10-13 07:17:09,822 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 224 transitions. Word has length 51 [2021-10-13 07:17:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:09,822 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 224 transitions. [2021-10-13 07:17:09,823 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) [2021-10-13 07:17:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 224 transitions. [2021-10-13 07:17:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:17:09,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:09,826 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] [2021-10-13 07:17:09,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:10,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:10,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1260433546, now seen corresponding path program 1 times [2021-10-13 07:17:10,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:10,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248028693] [2021-10-13 07:17:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:10,030 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:10,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:10,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:17:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:10,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:10,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:10,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:10,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:10,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248028693] [2021-10-13 07:17:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248028693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:10,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:10,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995989939] [2021-10-13 07:17:10,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:10,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:10,550 INFO L87 Difference]: Start difference. First operand 154 states and 224 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) [2021-10-13 07:17:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:10,737 INFO L93 Difference]: Finished difference Result 292 states and 435 transitions. [2021-10-13 07:17:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:10,738 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 [2021-10-13 07:17:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:10,741 INFO L225 Difference]: With dead ends: 292 [2021-10-13 07:17:10,741 INFO L226 Difference]: Without dead ends: 175 [2021-10-13 07:17:10,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-13 07:17:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-10-13 07:17:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.4470588235294117) internal successors, (246), 170 states have internal predecessors, (246), 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) [2021-10-13 07:17:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 246 transitions. [2021-10-13 07:17:10,783 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 246 transitions. Word has length 51 [2021-10-13 07:17:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:10,785 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 246 transitions. [2021-10-13 07:17:10,786 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) [2021-10-13 07:17:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 246 transitions. [2021-10-13 07:17:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:17:10,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:10,792 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] [2021-10-13 07:17:10,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:11,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:11,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -457628469, now seen corresponding path program 1 times [2021-10-13 07:17:11,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:11,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181312918] [2021-10-13 07:17:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:11,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:11,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:11,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:11,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:17:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:17:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:12,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:12,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181312918] [2021-10-13 07:17:12,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181312918] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:12,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729995025] [2021-10-13 07:17:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:12,001 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:17:12,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:17:12,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:17:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:17:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:12,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:12,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729995025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:12,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334147867] [2021-10-13 07:17:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:12,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:12,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:12,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:12,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:17:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:17:13,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:13,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:13,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334147867] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:13,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:13,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-13 07:17:13,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777727294] [2021-10-13 07:17:13,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:17:13,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:17:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:17:13,770 INFO L87 Difference]: Start difference. First operand 171 states and 246 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2021-10-13 07:17:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:14,332 INFO L93 Difference]: Finished difference Result 566 states and 848 transitions. [2021-10-13 07:17:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:17:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 [2021-10-13 07:17:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:14,336 INFO L225 Difference]: With dead ends: 566 [2021-10-13 07:17:14,337 INFO L226 Difference]: Without dead ends: 431 [2021-10-13 07:17:14,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:17:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-13 07:17:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2021-10-13 07:17:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.4521531100478469) internal successors, (607), 418 states have internal predecessors, (607), 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) [2021-10-13 07:17:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 607 transitions. [2021-10-13 07:17:14,358 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 607 transitions. Word has length 68 [2021-10-13 07:17:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 607 transitions. [2021-10-13 07:17:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2021-10-13 07:17:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 607 transitions. [2021-10-13 07:17:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:17:14,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:14,363 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] [2021-10-13 07:17:14,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:14,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:14,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 07:17:14,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:14,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2031900493, now seen corresponding path program 1 times [2021-10-13 07:17:14,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:14,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903083940] [2021-10-13 07:17:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:14,969 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:14,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:14,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:17:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:15,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:15,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:15,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903083940] [2021-10-13 07:17:15,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903083940] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:15,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:15,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:15,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351066665] [2021-10-13 07:17:15,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:15,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:15,613 INFO L87 Difference]: Start difference. First operand 419 states and 607 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-13 07:17:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:15,648 INFO L93 Difference]: Finished difference Result 927 states and 1364 transitions. [2021-10-13 07:17:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 [2021-10-13 07:17:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:15,653 INFO L225 Difference]: With dead ends: 927 [2021-10-13 07:17:15,653 INFO L226 Difference]: Without dead ends: 574 [2021-10-13 07:17:15,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-10-13 07:17:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 572. [2021-10-13 07:17:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.4623467600700526) internal successors, (835), 571 states have internal predecessors, (835), 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) [2021-10-13 07:17:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 835 transitions. [2021-10-13 07:17:15,678 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 835 transitions. Word has length 68 [2021-10-13 07:17:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 835 transitions. [2021-10-13 07:17:15,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-13 07:17:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 835 transitions. [2021-10-13 07:17:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:17:15,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:15,681 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] [2021-10-13 07:17:15,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:15,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:15,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash -875025075, now seen corresponding path program 1 times [2021-10-13 07:17:15,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:15,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612624047] [2021-10-13 07:17:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:15,895 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:15,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:15,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:17:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:16,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:16,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612624047] [2021-10-13 07:17:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612624047] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:16,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:16,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:16,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955756304] [2021-10-13 07:17:16,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:16,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:16,545 INFO L87 Difference]: Start difference. First operand 572 states and 835 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-13 07:17:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:16,580 INFO L93 Difference]: Finished difference Result 576 states and 837 transitions. [2021-10-13 07:17:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 [2021-10-13 07:17:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:16,583 INFO L225 Difference]: With dead ends: 576 [2021-10-13 07:17:16,584 INFO L226 Difference]: Without dead ends: 419 [2021-10-13 07:17:16,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-13 07:17:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2021-10-13 07:17:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.4375) internal successors, (598), 416 states have internal predecessors, (598), 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) [2021-10-13 07:17:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 598 transitions. [2021-10-13 07:17:16,601 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 598 transitions. Word has length 68 [2021-10-13 07:17:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:16,602 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 598 transitions. [2021-10-13 07:17:16,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-13 07:17:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 598 transitions. [2021-10-13 07:17:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:17:16,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:16,605 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] [2021-10-13 07:17:16,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:16,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:16,818 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1614503887, now seen corresponding path program 1 times [2021-10-13 07:17:16,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:16,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348416778] [2021-10-13 07:17:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:16,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:16,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:17:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:17:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:17,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:18,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348416778] [2021-10-13 07:17:18,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348416778] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:18,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801397151] [2021-10-13 07:17:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:18,032 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:17:18,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:17:18,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:17:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:17:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:18,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:17:19,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801397151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:19,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687055609] [2021-10-13 07:17:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:19,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:19,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:19,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:17:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:17:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:19,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:17:20,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687055609] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:20,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:20,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 14 [2021-10-13 07:17:20,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787183117] [2021-10-13 07:17:20,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:17:20,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:17:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:17:20,203 INFO L87 Difference]: Start difference. First operand 417 states and 598 transitions. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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) [2021-10-13 07:17:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:22,378 INFO L93 Difference]: Finished difference Result 1191 states and 1790 transitions. [2021-10-13 07:17:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:17:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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 [2021-10-13 07:17:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:22,385 INFO L225 Difference]: With dead ends: 1191 [2021-10-13 07:17:22,385 INFO L226 Difference]: Without dead ends: 831 [2021-10-13 07:17:22,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-10-13 07:17:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-10-13 07:17:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 554. [2021-10-13 07:17:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3905967450271248) internal successors, (769), 553 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) [2021-10-13 07:17:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 769 transitions. [2021-10-13 07:17:22,413 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 769 transitions. Word has length 68 [2021-10-13 07:17:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 769 transitions. [2021-10-13 07:17:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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) [2021-10-13 07:17:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 769 transitions. [2021-10-13 07:17:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 07:17:22,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:22,416 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] [2021-10-13 07:17:22,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:22,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:22,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-13 07:17:23,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:23,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1844660206, now seen corresponding path program 1 times [2021-10-13 07:17:23,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:23,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943927746] [2021-10-13 07:17:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:23,035 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:23,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:23,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:23,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:17:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 07:17:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 07:17:23,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:23,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943927746] [2021-10-13 07:17:23,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943927746] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:23,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:23,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:17:23,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864157227] [2021-10-13 07:17:23,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:23,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:23,871 INFO L87 Difference]: Start difference. First operand 554 states and 769 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-10-13 07:17:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:24,054 INFO L93 Difference]: Finished difference Result 1090 states and 1537 transitions. [2021-10-13 07:17:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 85 [2021-10-13 07:17:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:24,064 INFO L225 Difference]: With dead ends: 1090 [2021-10-13 07:17:24,065 INFO L226 Difference]: Without dead ends: 602 [2021-10-13 07:17:24,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-10-13 07:17:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 596. [2021-10-13 07:17:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 1.3798319327731092) internal successors, (821), 595 states have internal predecessors, (821), 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) [2021-10-13 07:17:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 821 transitions. [2021-10-13 07:17:24,101 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 821 transitions. Word has length 85 [2021-10-13 07:17:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 821 transitions. [2021-10-13 07:17:24,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-10-13 07:17:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 821 transitions. [2021-10-13 07:17:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 07:17:24,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:24,112 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] [2021-10-13 07:17:24,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:24,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:24,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2022672797, now seen corresponding path program 1 times [2021-10-13 07:17:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:24,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658447365] [2021-10-13 07:17:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:24,333 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:24,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:24,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:24,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:17:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:17:25,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:17:25,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:25,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658447365] [2021-10-13 07:17:25,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658447365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:25,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:25,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:17:25,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681584646] [2021-10-13 07:17:25,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:17:25,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:17:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:25,478 INFO L87 Difference]: Start difference. First operand 596 states and 821 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-10-13 07:17:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:25,567 INFO L93 Difference]: Finished difference Result 1702 states and 2351 transitions. [2021-10-13 07:17:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:17:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 104 [2021-10-13 07:17:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:25,577 INFO L225 Difference]: With dead ends: 1702 [2021-10-13 07:17:25,577 INFO L226 Difference]: Without dead ends: 1172 [2021-10-13 07:17:25,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-10-13 07:17:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2021-10-13 07:17:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.3693230505569838) internal successors, (1598), 1167 states have internal predecessors, (1598), 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) [2021-10-13 07:17:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1598 transitions. [2021-10-13 07:17:25,638 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1598 transitions. Word has length 104 [2021-10-13 07:17:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:25,639 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1598 transitions. [2021-10-13 07:17:25,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-10-13 07:17:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1598 transitions. [2021-10-13 07:17:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 07:17:25,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:25,642 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] [2021-10-13 07:17:25,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:25,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:25,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1888659291, now seen corresponding path program 1 times [2021-10-13 07:17:25,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:25,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992996931] [2021-10-13 07:17:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:25,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:25,863 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:17:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:26,393 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:17:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:26,737 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:17:26,737 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:17:26,738 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:17:26,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:26,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:26,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:17:27,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:27 BoogieIcfgContainer [2021-10-13 07:17:27,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:17:27,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:17:27,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:17:27,055 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:17:27,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:06" (3/4) ... [2021-10-13 07:17:27,057 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:17:27,183 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:17:27,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:17:27,185 INFO L168 Benchmark]: Toolchain (without parser) took 22205.35 ms. Allocated memory was 67.1 MB in the beginning and 157.3 MB in the end (delta: 90.2 MB). Free memory was 46.8 MB in the beginning and 110.8 MB in the end (delta: -64.1 MB). Peak memory consumption was 102.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,185 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 67.1 MB. Free memory is still 48.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:27,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 594.52 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 46.9 MB in the end (delta: -344.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.89 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 44.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,187 INFO L168 Benchmark]: Boogie Preprocessor took 95.85 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,187 INFO L168 Benchmark]: RCFGBuilder took 1107.51 ms. Allocated memory was 67.1 MB in the beginning and 96.5 MB in the end (delta: 29.4 MB). Free memory was 42.2 MB in the beginning and 67.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,188 INFO L168 Benchmark]: TraceAbstraction took 20161.59 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 66.3 MB in the beginning and 45.4 MB in the end (delta: 20.9 MB). Peak memory consumption was 81.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,189 INFO L168 Benchmark]: Witness Printer took 128.85 ms. Allocated memory is still 157.3 MB. Free memory was 45.4 MB in the beginning and 110.8 MB in the end (delta: -65.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:27,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 67.1 MB. Free memory is still 48.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 594.52 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 46.9 MB in the end (delta: -344.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 104.89 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 44.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 95.85 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1107.51 ms. Allocated memory was 67.1 MB in the beginning and 96.5 MB in the end (delta: 29.4 MB). Free memory was 42.2 MB in the beginning and 67.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20161.59 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 66.3 MB in the beginning and 45.4 MB in the end (delta: 20.9 MB). Peak memory consumption was 81.9 MB. Max. memory is 16.1 GB. * Witness Printer took 128.85 ms. Allocated memory is still 157.3 MB. Free memory was 45.4 MB in the beginning and 110.8 MB in the end (delta: -65.4 MB). Peak memory consumption was 10.5 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: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L625] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y ; [L65] int ag_Z ; [L66] int __retres60 ; [L69] s__state = 12292 [L70] blastFlag = 0 [L71] tmp = __VERIFIER_nondet_int() [L72] cb = 0 [L73] ret = -1 [L74] skip = 0 [L75] tmp___0 = 0 [L76] COND TRUE s__info_callback != 0 [L77] cb = s__info_callback [L85] s__in_handshake = s__in_handshake + 1 [L86] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(\read(s__hit)) [L98] ag_Z = 48 [L101] COND TRUE 1 [L103] state = s__state [L104] COND TRUE s__state == 12292 [L207] s__new_session = 1 [L208] s__state = 4096 [L209] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L214] s__server = 0 [L215] COND TRUE cb != 0 [L220] COND FALSE !(s__version + 65280 != 768) [L226] s__type = 4096 [L227] COND FALSE !((unsigned long )s__init_buf___0 == (unsigned long )((void *)0)) [L245] COND FALSE !(! tmp___4) [L251] COND FALSE !(! tmp___5) [L257] s__state = 4368 [L258] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L259] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND TRUE s__state == 4368 [L263] s__shutdown = 0 [L264] ret = __VERIFIER_nondet_int() [L265] COND TRUE blastFlag == 0 [L266] blastFlag = 1 [L270] COND FALSE !(ret <= 0) [L275] s__state = 4384 [L276] ag_X = s__state - 32 [L277] s__init_num = 0 [L278] COND TRUE (unsigned long )s__bbio != (unsigned long )s__wbio [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND TRUE s__state == 4384 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L296] COND FALSE !(ret <= 0) [L301] s__state = ag_X [L302] COND FALSE !(\read(s__hit)) [L305] s__state = s__state | ag_Z [L307] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND TRUE s__state == 4400 [L311] COND TRUE (unsigned long )s__s3__tmp__new_cipher__algorithms + 256UL [L312] skip = 1 [L326] s__state = 4416 [L327] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND TRUE s__state == 4416 [L331] ret = __VERIFIER_nondet_int() [L332] COND FALSE !(blastFlag == 3) [L337] COND FALSE !(ret <= 0) [L342] s__state = 4432 [L343] s__init_num = 0 [L344] COND FALSE !(! tmp___6) [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND FALSE !(s__state == 4416) [L140] COND FALSE !(s__state == 4417) [L143] COND TRUE s__state == 4432 [L353] ret = __VERIFIER_nondet_int() [L354] COND TRUE blastFlag <= 5 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 126 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19989.1ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 50.5ms, AutomataDifference: 3949.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1815 SDtfs, 2240 SDslu, 2490 SDs, 0 SdLazy, 2257 SolverSat, 386 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2392.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1783 GetRequests, 1740 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 486.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1168occurred in iteration=10, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 320.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 310 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 298.7ms SsaConstructionTime, 810.9ms SatisfiabilityAnalysisTime, 7173.0ms InterpolantComputationTime, 1001 NumberOfCodeBlocks, 1001 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1766 ConstructedInterpolants, 236 QuantifiedInterpolants, 5445 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1883 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 854/1156 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! [2021-10-13 07:17:27,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee180ed1-bd96-4ac1-8849-4b81c61c3962/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...