./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:08:04,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:04,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:04,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:04,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:04,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:04,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:04,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:04,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:04,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:04,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:04,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:04,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:04,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:04,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:04,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:04,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:04,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:04,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:04,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:04,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:04,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:04,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:04,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:04,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:04,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:04,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:04,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:04,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:04,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:04,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:04,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:04,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:04,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:04,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:04,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:04,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:04,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:04,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:04,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:04,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:04,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:08:04,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:04,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:04,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:04,203 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:04,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:04,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:04,204 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:08:04,204 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:04,211 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:04,211 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:08:04,212 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:08:04,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:04,213 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:08:04,213 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:08:04,213 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:08:04,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:04,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:04,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:08:04,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:04,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:04,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:04,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:04,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:04,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:04,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:04,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:04,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:04,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:04,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:04,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:04,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:04,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:04,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:04,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:04,220 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:08:04,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:08:04,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:04,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:04,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:04,221 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b [2021-10-13 08:08:04,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:04,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:04,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:04,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:04,535 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:04,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2021-10-13 08:08:04,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/5e9682caf/9f94f9b90615417c93122806a65794c8/FLAGd61ec6ee5 [2021-10-13 08:08:05,106 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:05,108 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2021-10-13 08:08:05,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/5e9682caf/9f94f9b90615417c93122806a65794c8/FLAGd61ec6ee5 [2021-10-13 08:08:05,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/5e9682caf/9f94f9b90615417c93122806a65794c8 [2021-10-13 08:08:05,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:05,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:05,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:05,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:05,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:05,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326fbb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05, skipping insertion in model container [2021-10-13 08:08:05,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:05,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:05,775 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c[44554,44567] [2021-10-13 08:08:05,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:05,791 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:05,870 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c[44554,44567] [2021-10-13 08:08:05,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:05,897 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:05,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05 WrapperNode [2021-10-13 08:08:05,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:05,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:05,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:05,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:05,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:05,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:05,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:05,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:05,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:05,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:06,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:06,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:06,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:06,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:06,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:06,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:06,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:06,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (1/1) ... [2021-10-13 08:08:06,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:06,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:06,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:08:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:06,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:06,258 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 08:08:06,864 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-13 08:08:06,865 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-13 08:08:07,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:07,276 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:08:07,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:07 BoogieIcfgContainer [2021-10-13 08:08:07,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:07,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:07,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:07,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:07,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:05" (1/3) ... [2021-10-13 08:08:07,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc484f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:07, skipping insertion in model container [2021-10-13 08:08:07,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:05" (2/3) ... [2021-10-13 08:08:07,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc484f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:07, skipping insertion in model container [2021-10-13 08:08:07,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:07" (3/3) ... [2021-10-13 08:08:07,289 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2021-10-13 08:08:07,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:07,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:08:07,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:07,353 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 08:08:07,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:08:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 1.7767857142857142) internal successors, (199), 113 states have internal predecessors, (199), 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 08:08:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:08:07,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:07,376 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 08:08:07,376 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1319225977, now seen corresponding path program 1 times [2021-10-13 08:08:07,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:07,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907028914] [2021-10-13 08:08:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:07,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:07,579 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 08:08:07,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:07,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907028914] [2021-10-13 08:08:07,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907028914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:07,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:07,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:08:07,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134923867] [2021-10-13 08:08:07,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:07,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:07,604 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 1.7767857142857142) internal successors, (199), 113 states have internal predecessors, (199), 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 08:08:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:07,807 INFO L93 Difference]: Finished difference Result 250 states and 435 transitions. [2021-10-13 08:08:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:07,809 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 08:08:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:07,819 INFO L225 Difference]: With dead ends: 250 [2021-10-13 08:08:07,819 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 08:08:07,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 08:08:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-10-13 08:08:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.496124031007752) internal successors, (193), 129 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 193 transitions. [2021-10-13 08:08:07,866 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 193 transitions. Word has length 19 [2021-10-13 08:08:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:07,867 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 193 transitions. [2021-10-13 08:08:07,867 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 08:08:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 193 transitions. [2021-10-13 08:08:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:08:07,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:07,869 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:08:07,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 616971127, now seen corresponding path program 1 times [2021-10-13 08:08:07,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:07,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384925005] [2021-10-13 08:08:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:07,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:07,950 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 08:08:07,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:07,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384925005] [2021-10-13 08:08:07,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384925005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:07,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273085788] [2021-10-13 08:08:07,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:07,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:07,955 INFO L87 Difference]: Start difference. First operand 130 states and 193 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:08,136 INFO L93 Difference]: Finished difference Result 271 states and 401 transitions. [2021-10-13 08:08:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:08:08,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:08:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:08,144 INFO L225 Difference]: With dead ends: 271 [2021-10-13 08:08:08,144 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 08:08:08,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 08:08:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-10-13 08:08:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.488888888888889) internal successors, (201), 135 states have internal predecessors, (201), 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 08:08:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 201 transitions. [2021-10-13 08:08:08,177 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 201 transitions. Word has length 24 [2021-10-13 08:08:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:08,178 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 201 transitions. [2021-10-13 08:08:08,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 201 transitions. [2021-10-13 08:08:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 08:08:08,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:08,181 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] [2021-10-13 08:08:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:08:08,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1065790628, now seen corresponding path program 1 times [2021-10-13 08:08:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:08,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627484347] [2021-10-13 08:08:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:08,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:08,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:08,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627484347] [2021-10-13 08:08:08,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627484347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:08,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:08,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:08,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436975288] [2021-10-13 08:08:08,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:08,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:08,313 INFO L87 Difference]: Start difference. First operand 136 states and 201 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:08,538 INFO L93 Difference]: Finished difference Result 324 states and 494 transitions. [2021-10-13 08:08:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 08:08:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:08,540 INFO L225 Difference]: With dead ends: 324 [2021-10-13 08:08:08,541 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:08:08,545 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 08:08:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:08:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2021-10-13 08:08:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4597701149425288) internal successors, (254), 174 states have internal predecessors, (254), 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 08:08:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 254 transitions. [2021-10-13 08:08:08,568 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 254 transitions. Word has length 34 [2021-10-13 08:08:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:08,569 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 254 transitions. [2021-10-13 08:08:08,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 254 transitions. [2021-10-13 08:08:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 08:08:08,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:08,576 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:08,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:08:08,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -257006576, now seen corresponding path program 1 times [2021-10-13 08:08:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:08,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744950281] [2021-10-13 08:08:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:08,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:08,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744950281] [2021-10-13 08:08:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744950281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814582120] [2021-10-13 08:08:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:08,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:08,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:08,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:08:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:08:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:09,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:09,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814582120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:09,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68858187] [2021-10-13 08:08:09,228 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-10-13 08:08:09,229 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:08:09,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:08:09,243 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:08:09,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:08:09,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,454 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:09,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:08:09,461 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:09,462 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:08:09,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 394 [2021-10-13 08:08:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,683 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 08:08:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 08:08:09,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,811 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 08:08:09,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 08:08:09,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:09,909 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 08:08:09,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 08:08:09,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:09,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:08:09,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:09,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:10,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:10,224 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.3 percent of original size [2021-10-13 08:08:10,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1047 [2021-10-13 08:08:10,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-13 08:08:10,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:1113, output treesize:1047 [2021-10-13 08:08:10,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:10,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:10,481 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:08:10,485 INFO L168 Benchmark]: Toolchain (without parser) took 5032.92 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 63.5 MB in the beginning and 107.4 MB in the end (delta: -43.9 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,485 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 80.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:10,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.11 ms. Allocated memory is still 104.9 MB. Free memory was 63.3 MB in the beginning and 75.6 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 72.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,487 INFO L168 Benchmark]: Boogie Preprocessor took 64.13 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 70.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,488 INFO L168 Benchmark]: RCFGBuilder took 1233.04 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.6 MB in the beginning and 81.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,489 INFO L168 Benchmark]: TraceAbstraction took 3201.88 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 80.8 MB in the beginning and 107.4 MB in the end (delta: -26.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:10,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 80.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 451.11 ms. Allocated memory is still 104.9 MB. Free memory was 63.3 MB in the beginning and 75.6 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 72.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.13 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 70.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1233.04 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.6 MB in the beginning and 81.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3201.88 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 80.8 MB in the beginning and 107.4 MB in the end (delta: -26.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:08:10,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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 08:08:12,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:12,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:12,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:12,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:12,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:12,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:12,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:12,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:12,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:12,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:13,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:13,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:13,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:13,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:13,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:13,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:13,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:13,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:13,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:13,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:13,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:13,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:13,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:13,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:13,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:13,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:13,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:13,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:13,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:13,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:13,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:13,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:13,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:13,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:13,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:13,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:13,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:13,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:13,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:13,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:13,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:08:13,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:13,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:13,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:13,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:13,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:13,089 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:13,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:13,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:13,090 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:13,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:13,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:13,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:13,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:13,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:13,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:13,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:13,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:13,094 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:08:13,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:08:13,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:13,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:13,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:13,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:13,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:13,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:08:13,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:13,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:13,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:13,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:13,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:13,098 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:08:13,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:13,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:13,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:13,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:13,099 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b [2021-10-13 08:08:13,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:13,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:13,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:13,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:13,458 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:13,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2021-10-13 08:08:13,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/ee15bcda6/e0dbaf72b8a044bd9e4bf6ca789b7af9/FLAGd3ee51bed [2021-10-13 08:08:14,201 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:14,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2021-10-13 08:08:14,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/ee15bcda6/e0dbaf72b8a044bd9e4bf6ca789b7af9/FLAGd3ee51bed [2021-10-13 08:08:14,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/data/ee15bcda6/e0dbaf72b8a044bd9e4bf6ca789b7af9 [2021-10-13 08:08:14,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:14,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:14,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:14,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:14,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:14,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e1fc47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14, skipping insertion in model container [2021-10-13 08:08:14,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:14,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:14,727 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c[44554,44567] [2021-10-13 08:08:14,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:14,745 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:14,816 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_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c[44554,44567] [2021-10-13 08:08:14,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:14,836 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:14,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14 WrapperNode [2021-10-13 08:08:14,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:14,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:14,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:14,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:14,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:14,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:14,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:14,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:14,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:14,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:14,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:14,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:14,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (1/1) ... [2021-10-13 08:08:14,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:15,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:15,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:08:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:15,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:15,170 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 08:08:15,813 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-13 08:08:15,813 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-13 08:08:15,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:15,826 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:08:15,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:15 BoogieIcfgContainer [2021-10-13 08:08:15,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:15,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:15,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:15,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:15,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:14" (1/3) ... [2021-10-13 08:08:15,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edecc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:15, skipping insertion in model container [2021-10-13 08:08:15,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:14" (2/3) ... [2021-10-13 08:08:15,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edecc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:15, skipping insertion in model container [2021-10-13 08:08:15,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:15" (3/3) ... [2021-10-13 08:08:15,837 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2021-10-13 08:08:15,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:15,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:08:15,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:15,928 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 08:08:15,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:08:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7417218543046358) internal successors, (263), 152 states have internal predecessors, (263), 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 08:08:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:08:15,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:15,988 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, 1] [2021-10-13 08:08:15,989 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -651780530, now seen corresponding path program 1 times [2021-10-13 08:08:16,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:16,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375884262] [2021-10-13 08:08:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:16,011 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:16,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:16,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:08:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:08:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:16,335 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 08:08:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:16,488 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 08:08:16,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:16,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375884262] [2021-10-13 08:08:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375884262] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:16,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:16,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718253361] [2021-10-13 08:08:16,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:16,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:16,515 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7417218543046358) internal successors, (263), 152 states have internal predecessors, (263), 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 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 08:08:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:16,878 INFO L93 Difference]: Finished difference Result 356 states and 609 transitions. [2021-10-13 08:08:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 26 [2021-10-13 08:08:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:16,893 INFO L225 Difference]: With dead ends: 356 [2021-10-13 08:08:16,893 INFO L226 Difference]: Without dead ends: 184 [2021-10-13 08:08:16,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-13 08:08:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2021-10-13 08:08:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.550561797752809) internal successors, (276), 178 states have internal predecessors, (276), 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 08:08:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 276 transitions. [2021-10-13 08:08:16,995 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 276 transitions. Word has length 26 [2021-10-13 08:08:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 276 transitions. [2021-10-13 08:08:16,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 08:08:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 276 transitions. [2021-10-13 08:08:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 08:08:16,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:16,998 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, 1, 1, 1, 1, 1] [2021-10-13 08:08:17,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:17,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:17,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1026970664, now seen corresponding path program 1 times [2021-10-13 08:08:17,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:17,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167716281] [2021-10-13 08:08:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:17,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:17,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:17,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:08:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:08:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:17,435 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 08:08:17,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:17,555 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 08:08:17,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:17,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167716281] [2021-10-13 08:08:17,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167716281] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:17,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:17,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:08:17,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282429148] [2021-10-13 08:08:17,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:08:17,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:08:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:08:17,563 INFO L87 Difference]: Start difference. First operand 179 states and 276 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 08:08:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:18,068 INFO L93 Difference]: Finished difference Result 600 states and 929 transitions. [2021-10-13 08:08:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:08:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 08:08:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:18,073 INFO L225 Difference]: With dead ends: 600 [2021-10-13 08:08:18,074 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 08:08:18,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:08:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 08:08:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 362. [2021-10-13 08:08:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.5623268698060941) internal successors, (564), 361 states have internal predecessors, (564), 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 08:08:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 564 transitions. [2021-10-13 08:08:18,105 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 564 transitions. Word has length 30 [2021-10-13 08:08:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:18,106 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 564 transitions. [2021-10-13 08:08:18,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 08:08:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 564 transitions. [2021-10-13 08:08:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 08:08:18,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:18,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:18,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 08:08:18,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:18,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1531549699, now seen corresponding path program 1 times [2021-10-13 08:08:18,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:18,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409618622] [2021-10-13 08:08:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:18,323 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:18,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:18,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:08:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:18,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:18,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409618622] [2021-10-13 08:08:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409618622] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:18,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:18,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:08:18,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476245150] [2021-10-13 08:08:18,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:18,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:18,692 INFO L87 Difference]: Start difference. First operand 362 states and 564 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 08:08:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:18,873 INFO L93 Difference]: Finished difference Result 764 states and 1188 transitions. [2021-10-13 08:08:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2021-10-13 08:08:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:18,877 INFO L225 Difference]: With dead ends: 764 [2021-10-13 08:08:18,877 INFO L226 Difference]: Without dead ends: 398 [2021-10-13 08:08:18,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 08:08:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-13 08:08:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 390. [2021-10-13 08:08:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.5398457583547558) internal successors, (599), 389 states have internal predecessors, (599), 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 08:08:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 599 transitions. [2021-10-13 08:08:18,907 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 599 transitions. Word has length 50 [2021-10-13 08:08:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:18,908 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 599 transitions. [2021-10-13 08:08:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 08:08:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 599 transitions. [2021-10-13 08:08:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-13 08:08:18,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:18,912 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-13 08:08:18,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:19,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash 694086665, now seen corresponding path program 1 times [2021-10-13 08:08:19,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:19,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774774237] [2021-10-13 08:08:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:19,124 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:19,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:19,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:08:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 08:08:19,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 08:08:19,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:19,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774774237] [2021-10-13 08:08:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774774237] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:19,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:19,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208739743] [2021-10-13 08:08:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:19,717 INFO L87 Difference]: Start difference. First operand 390 states and 599 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:08:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:20,012 INFO L93 Difference]: Finished difference Result 919 states and 1437 transitions. [2021-10-13 08:08:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 72 [2021-10-13 08:08:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:20,017 INFO L225 Difference]: With dead ends: 919 [2021-10-13 08:08:20,017 INFO L226 Difference]: Without dead ends: 537 [2021-10-13 08:08:20,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-10-13 08:08:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 505. [2021-10-13 08:08:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5198412698412698) internal successors, (766), 504 states have internal predecessors, (766), 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 08:08:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 766 transitions. [2021-10-13 08:08:20,053 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 766 transitions. Word has length 72 [2021-10-13 08:08:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:20,057 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 766 transitions. [2021-10-13 08:08:20,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:08:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 766 transitions. [2021-10-13 08:08:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 08:08:20,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:20,068 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 08:08:20,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:20,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:20,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1005957392, now seen corresponding path program 1 times [2021-10-13 08:08:20,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:20,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713415063] [2021-10-13 08:08:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:20,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:20,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:20,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:20,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:08:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 08:08:20,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 08:08:20,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:20,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713415063] [2021-10-13 08:08:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713415063] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:20,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:20,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:08:20,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69157370] [2021-10-13 08:08:20,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:20,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:20,812 INFO L87 Difference]: Start difference. First operand 505 states and 766 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 08:08:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:20,976 INFO L93 Difference]: Finished difference Result 1042 states and 1585 transitions. [2021-10-13 08:08:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:20,984 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 73 [2021-10-13 08:08:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:20,988 INFO L225 Difference]: With dead ends: 1042 [2021-10-13 08:08:20,988 INFO L226 Difference]: Without dead ends: 545 [2021-10-13 08:08:20,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 08:08:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-10-13 08:08:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 535. [2021-10-13 08:08:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.5056179775280898) internal successors, (804), 534 states have internal predecessors, (804), 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 08:08:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 804 transitions. [2021-10-13 08:08:21,014 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 804 transitions. Word has length 73 [2021-10-13 08:08:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:21,017 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 804 transitions. [2021-10-13 08:08:21,017 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 08:08:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 804 transitions. [2021-10-13 08:08:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 08:08:21,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:21,021 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-13 08:08:21,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:21,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 918484626, now seen corresponding path program 1 times [2021-10-13 08:08:21,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:21,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474132020] [2021-10-13 08:08:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:21,238 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:21,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:21,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:08:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 08:08:21,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 08:08:21,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:21,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474132020] [2021-10-13 08:08:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474132020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:21,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:21,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:08:21,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82352757] [2021-10-13 08:08:21,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:21,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:21,942 INFO L87 Difference]: Start difference. First operand 535 states and 804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:08:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:22,116 INFO L93 Difference]: Finished difference Result 1105 states and 1672 transitions. [2021-10-13 08:08:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 95 [2021-10-13 08:08:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:22,121 INFO L225 Difference]: With dead ends: 1105 [2021-10-13 08:08:22,122 INFO L226 Difference]: Without dead ends: 559 [2021-10-13 08:08:22,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 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 08:08:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-10-13 08:08:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 545. [2021-10-13 08:08:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.4852941176470589) internal successors, (808), 544 states have internal predecessors, (808), 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 08:08:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 808 transitions. [2021-10-13 08:08:22,146 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 808 transitions. Word has length 95 [2021-10-13 08:08:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:22,147 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 808 transitions. [2021-10-13 08:08:22,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:08:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 808 transitions. [2021-10-13 08:08:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-13 08:08:22,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:22,149 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:22,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:22,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:22,361 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:22,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1209412422, now seen corresponding path program 1 times [2021-10-13 08:08:22,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:22,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272174170] [2021-10-13 08:08:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:22,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:22,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:22,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:08:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:22,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 08:08:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 08:08:23,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:23,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272174170] [2021-10-13 08:08:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272174170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:23,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:23,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888087600] [2021-10-13 08:08:23,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:23,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:23,035 INFO L87 Difference]: Start difference. First operand 545 states and 808 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 08:08:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:23,107 INFO L93 Difference]: Finished difference Result 2126 states and 3140 transitions. [2021-10-13 08:08:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 101 [2021-10-13 08:08:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:23,118 INFO L225 Difference]: With dead ends: 2126 [2021-10-13 08:08:23,118 INFO L226 Difference]: Without dead ends: 1589 [2021-10-13 08:08:23,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-10-13 08:08:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 547. [2021-10-13 08:08:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.4835164835164836) internal successors, (810), 546 states have internal predecessors, (810), 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 08:08:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 810 transitions. [2021-10-13 08:08:23,159 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 810 transitions. Word has length 101 [2021-10-13 08:08:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:23,160 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 810 transitions. [2021-10-13 08:08:23,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 08:08:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 810 transitions. [2021-10-13 08:08:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-13 08:08:23,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:23,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:23,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:23,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:23,375 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:23,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:23,375 INFO L82 PathProgramCache]: Analyzing trace with hash -70451256, now seen corresponding path program 1 times [2021-10-13 08:08:23,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:23,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472666942] [2021-10-13 08:08:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:23,376 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:23,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:23,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:08:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 08:08:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 08:08:24,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:24,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472666942] [2021-10-13 08:08:24,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472666942] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:24,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:24,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:24,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695769442] [2021-10-13 08:08:24,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:24,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:24,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:24,070 INFO L87 Difference]: Start difference. First operand 547 states and 810 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 08:08:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:24,140 INFO L93 Difference]: Finished difference Result 1605 states and 2370 transitions. [2021-10-13 08:08:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 101 [2021-10-13 08:08:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:24,148 INFO L225 Difference]: With dead ends: 1605 [2021-10-13 08:08:24,148 INFO L226 Difference]: Without dead ends: 1066 [2021-10-13 08:08:24,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-10-13 08:08:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 984. [2021-10-13 08:08:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.491353001017294) internal successors, (1466), 983 states have internal predecessors, (1466), 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 08:08:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1466 transitions. [2021-10-13 08:08:24,202 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1466 transitions. Word has length 101 [2021-10-13 08:08:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:24,204 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1466 transitions. [2021-10-13 08:08:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 08:08:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1466 transitions. [2021-10-13 08:08:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-13 08:08:24,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:24,206 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:24,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:24,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:24,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1334267025, now seen corresponding path program 1 times [2021-10-13 08:08:24,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:24,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276971426] [2021-10-13 08:08:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:24,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:24,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:24,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:24,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:08:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 08:08:25,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 08:08:25,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:25,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276971426] [2021-10-13 08:08:25,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276971426] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:25,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:25,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045667979] [2021-10-13 08:08:25,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:25,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:25,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:25,255 INFO L87 Difference]: Start difference. First operand 984 states and 1466 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 08:08:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:25,429 INFO L93 Difference]: Finished difference Result 3457 states and 5146 transitions. [2021-10-13 08:08:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 102 [2021-10-13 08:08:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:25,444 INFO L225 Difference]: With dead ends: 3457 [2021-10-13 08:08:25,444 INFO L226 Difference]: Without dead ends: 2481 [2021-10-13 08:08:25,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-10-13 08:08:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2479. [2021-10-13 08:08:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 1.4749798224374495) internal successors, (3655), 2478 states have internal predecessors, (3655), 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 08:08:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3655 transitions. [2021-10-13 08:08:25,578 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3655 transitions. Word has length 102 [2021-10-13 08:08:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 3655 transitions. [2021-10-13 08:08:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 08:08:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3655 transitions. [2021-10-13 08:08:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-13 08:08:25,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:25,583 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:25,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:25,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:25,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 747461011, now seen corresponding path program 1 times [2021-10-13 08:08:25,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:25,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483348187] [2021-10-13 08:08:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:25,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:25,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:25,796 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:25,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:08:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:08:26,151 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:08:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:08:26,417 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:08:26,417 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:08:26,418 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:26,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:26,637 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:08:26,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:08:26 BoogieIcfgContainer [2021-10-13 08:08:26,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:08:26,737 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:08:26,737 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:08:26,737 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:08:26,738 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:15" (3/4) ... [2021-10-13 08:08:26,739 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:08:26,849 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:08:26,849 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:08:26,851 INFO L168 Benchmark]: Toolchain (without parser) took 12390.03 ms. Allocated memory was 62.9 MB in the beginning and 115.3 MB in the end (delta: 52.4 MB). Free memory was 43.0 MB in the beginning and 35.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,851 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:26,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.12 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 44.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.39 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 41.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,853 INFO L168 Benchmark]: Boogie Preprocessor took 44.96 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 39.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,853 INFO L168 Benchmark]: RCFGBuilder took 871.23 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 39.1 MB in the beginning and 51.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,854 INFO L168 Benchmark]: TraceAbstraction took 10906.12 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 51.1 MB in the beginning and 45.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,854 INFO L168 Benchmark]: Witness Printer took 112.46 ms. Allocated memory is still 115.3 MB. Free memory was 45.6 MB in the beginning and 35.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:26,856 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 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.12 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 44.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 72.39 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 41.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.96 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 39.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 871.23 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 39.1 MB in the beginning and 51.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10906.12 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 51.1 MB in the beginning and 45.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * Witness Printer took 112.46 ms. Allocated memory is still 115.3 MB. Free memory was 45.6 MB in the beginning and 35.1 MB in the end (delta: 10.5 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: 644]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L649] int s ; [L650] int tmp ; [L654] s = 8464 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__hit = __VERIFIER_nondet_int() ; [L22] int s__rwstate ; [L23] int s__init_buf___0 = 1; [L24] int s__debug = __VERIFIER_nondet_int() ; [L25] int s__shutdown ; [L26] int s__cert = __VERIFIER_nondet_int() ; [L27] int s__options = __VERIFIER_nondet_int() ; [L28] int s__verify_mode = __VERIFIER_nondet_int() ; [L29] int s__session__peer = __VERIFIER_nondet_int() ; [L30] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L31] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__cert_request ; [L36] int s__s3__tmp__reuse_message ; [L37] int s__s3__tmp__use_rsa_tmp ; [L38] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher__algorithms ; [L40] int s__s3__tmp__next_state___0 ; [L41] int s__s3__tmp__new_cipher__algo_strength ; [L42] int s__session__cipher ; [L43] int buf ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp ; [L47] int cb ; [L48] long num1 = __VERIFIER_nondet_long() ; [L49] int ret ; [L50] int new_state ; [L51] int state ; [L52] int skip ; [L53] int got_new_session ; [L54] int tmp___1 = __VERIFIER_nondet_int() ; [L55] int tmp___2 = __VERIFIER_nondet_int() ; [L56] int tmp___3 = __VERIFIER_nondet_int() ; [L57] int tmp___4 = __VERIFIER_nondet_int() ; [L58] int tmp___5 = __VERIFIER_nondet_int() ; [L59] int tmp___6 = __VERIFIER_nondet_int() ; [L60] int tmp___7 = __VERIFIER_nondet_int() ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 = __VERIFIER_nondet_int() ; [L63] int tmp___10 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] unsigned long __cil_tmp57 ; [L68] unsigned long __cil_tmp58 ; [L69] unsigned long __cil_tmp59 ; [L70] int __cil_tmp60 ; [L71] unsigned long __cil_tmp61 ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] skip = 1 [L317] s__state = 8528 [L318] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L322] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L323] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L325] __cil_tmp57 = (unsigned long )s__options [L326] COND TRUE __cil_tmp57 + 2097152UL [L327] s__s3__tmp__use_rsa_tmp = 1 [L332] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L359] ret = __VERIFIER_nondet_int() [L360] COND FALSE !(blastFlag == 6) [L363] COND FALSE !(ret <= 0) [L380] s__state = 8544 [L381] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE state == 8528 [L605] COND TRUE s__state == 8544 [L606] COND TRUE tmp___7 != 1024 [L607] COND TRUE tmp___7 != 512 [L608] COND TRUE __cil_tmp58 != 4294967294 [L609] COND TRUE l != 4294967266 [L644] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 153 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10720.4ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 63.6ms, AutomataDifference: 2123.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2327 SDtfs, 2438 SDslu, 2166 SDs, 0 SdLazy, 1113 SolverSat, 280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1152.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1286 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2479occurred in iteration=9, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 445.7ms AutomataMinimizationTime, 9 MinimizatonAttempts, 1262 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 179.8ms SsaConstructionTime, 357.9ms SatisfiabilityAnalysisTime, 3474.3ms InterpolantComputationTime, 752 NumberOfCodeBlocks, 752 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1282 ConstructedInterpolants, 0 QuantifiedInterpolants, 2073 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1020 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 902/902 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 08:08:26,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8fb1d14-eda4-4c55-b57c-5ee2dcc690f5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...