./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9da884533d6d47d95abcc742a22337ea753025b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9da884533d6d47d95abcc742a22337ea753025b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:59:54,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:59:54,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:59:54,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:59:54,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:59:54,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:59:54,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:59:54,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:59:54,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:59:54,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:59:54,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:59:54,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:59:54,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:59:54,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:59:54,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:59:54,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:59:54,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:59:54,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:59:54,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:59:54,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:59:54,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:59:54,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:59:54,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:59:54,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:59:54,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:59:54,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:59:54,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:59:54,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:59:54,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:59:54,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:59:54,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:59:54,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:59:54,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:59:54,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:59:54,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:59:54,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:59:54,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:59:54,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:59:54,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:59:54,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:59:54,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:59:54,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 01:59:54,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:59:54,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:59:54,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:59:54,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:59:54,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:59:54,415 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:59:54,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 01:59:54,415 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:59:54,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:59:54,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 01:59:54,417 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 01:59:54,417 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:59:54,417 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 01:59:54,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 01:59:54,418 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 01:59:54,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 01:59:54,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 01:59:54,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:59:54,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:59:54,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 01:59:54,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 01:59:54,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:59:54,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:59:54,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 01:59:54,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 01:59:54,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 01:59:54,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:59:54,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:59:54,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:59:54,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:59:54,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:59:54,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:59:54,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:54,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:59:54,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:59:54,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 01:59:54,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 01:59:54,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:59:54,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:59:54,425 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_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9da884533d6d47d95abcc742a22337ea753025b [2021-10-16 01:59:54,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:59:54,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:59:54,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:59:54,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:59:54,827 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:59:54,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-16 01:59:54,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9d740cb1d/5794d91485764e388c76992329f00f70/FLAGa56b05c2f [2021-10-16 01:59:55,443 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:59:55,446 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-16 01:59:55,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9d740cb1d/5794d91485764e388c76992329f00f70/FLAGa56b05c2f [2021-10-16 01:59:55,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9d740cb1d/5794d91485764e388c76992329f00f70 [2021-10-16 01:59:55,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:59:55,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:59:55,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:55,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:59:55,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:59:55,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:55" (1/1) ... [2021-10-16 01:59:55,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2956b25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:55, skipping insertion in model container [2021-10-16 01:59:55,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:55" (1/1) ... [2021-10-16 01:59:55,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:59:55,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:59:56,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:56,149 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:59:56,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:56,237 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:59:56,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56 WrapperNode [2021-10-16 01:59:56,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:56,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:56,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:59:56,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:59:56,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:56,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:59:56,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:59:56,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:59:56,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:59:56,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:59:56,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:59:56,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:59:56,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (1/1) ... [2021-10-16 01:59:56,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:56,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:59:56,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:59:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 01:59:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 01:59:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:59:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 01:59:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:59:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:59:56,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:59:56,969 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 01:59:56,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:56 BoogieIcfgContainer [2021-10-16 01:59:56,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:59:56,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:59:56,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:59:56,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:59:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:59:55" (1/3) ... [2021-10-16 01:59:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12298c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:56, skipping insertion in model container [2021-10-16 01:59:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:56" (2/3) ... [2021-10-16 01:59:56,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12298c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:56, skipping insertion in model container [2021-10-16 01:59:56,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:56" (3/3) ... [2021-10-16 01:59:56,980 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-10-16 01:59:56,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:59:56,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 01:59:57,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:59:57,058 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 01:59:57,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 01:59:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 01:59:57,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:57,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 01:59:57,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,095 INFO L82 PathProgramCache]: Analyzing trace with hash 88958, now seen corresponding path program 1 times [2021-10-16 01:59:57,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:57,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741307148] [2021-10-16 01:59:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:57,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:57,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741307148] [2021-10-16 01:59:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741307148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:57,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:57,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 01:59:57,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731873472] [2021-10-16 01:59:57,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:59:57,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:59:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,355 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:57,423 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-16 01:59:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:59:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-16 01:59:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:57,433 INFO L225 Difference]: With dead ends: 14 [2021-10-16 01:59:57,433 INFO L226 Difference]: Without dead ends: 13 [2021-10-16 01:59:57,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-16 01:59:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-16 01:59:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-16 01:59:57,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2021-10-16 01:59:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:57,489 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-16 01:59:57,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-16 01:59:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 01:59:57,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:57,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 01:59:57,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 01:59:57,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash 88959, now seen corresponding path program 1 times [2021-10-16 01:59:57,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:57,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720576117] [2021-10-16 01:59:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:57,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:57,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720576117] [2021-10-16 01:59:57,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720576117] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:57,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:59:57,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687823443] [2021-10-16 01:59:57,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:59:57,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:59:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:57,621 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:57,680 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-16 01:59:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:59:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-10-16 01:59:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:57,682 INFO L225 Difference]: With dead ends: 12 [2021-10-16 01:59:57,682 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 01:59:57,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 01:59:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 01:59:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-16 01:59:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.625) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-16 01:59:57,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2021-10-16 01:59:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:57,688 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-16 01:59:57,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-16 01:59:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 01:59:57,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:57,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 01:59:57,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 01:59:57,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash 90363, now seen corresponding path program 1 times [2021-10-16 01:59:57,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:57,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822774152] [2021-10-16 01:59:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:57,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:57,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822774152] [2021-10-16 01:59:57,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822774152] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:57,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:57,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 01:59:57,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752252170] [2021-10-16 01:59:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:59:57,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:59:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,810 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:57,831 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-16 01:59:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:59:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-16 01:59:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:57,834 INFO L225 Difference]: With dead ends: 11 [2021-10-16 01:59:57,834 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 01:59:57,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 01:59:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 01:59:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 01:59:57,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 3 [2021-10-16 01:59:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 01:59:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 01:59:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 01:59:57,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:57,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 01:59:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 01:59:57,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2802126, now seen corresponding path program 1 times [2021-10-16 01:59:57,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:57,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46022562] [2021-10-16 01:59:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:57,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:57,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46022562] [2021-10-16 01:59:57,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46022562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:57,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:57,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:59:57,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597267313] [2021-10-16 01:59:57,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:59:57,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:59:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,896 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:57,911 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2021-10-16 01:59:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:59:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 01:59:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:57,912 INFO L225 Difference]: With dead ends: 10 [2021-10-16 01:59:57,913 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 01:59:57,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 01:59:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 01:59:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-16 01:59:57,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2021-10-16 01:59:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:57,916 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-16 01:59:57,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-16 01:59:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 01:59:57,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:57,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 01:59:57,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 01:59:57,918 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2802127, now seen corresponding path program 1 times [2021-10-16 01:59:57,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:57,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401844134] [2021-10-16 01:59:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:57,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:57,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401844134] [2021-10-16 01:59:57,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401844134] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:57,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:57,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:59:57,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755676992] [2021-10-16 01:59:57,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:59:57,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:59:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:57,971 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:58,018 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-16 01:59:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:59:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 01:59:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:58,021 INFO L225 Difference]: With dead ends: 15 [2021-10-16 01:59:58,021 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 01:59:58,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 01:59:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 01:59:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2021-10-16 01:59:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 01:59:58,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2021-10-16 01:59:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:58,027 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 01:59:58,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 01:59:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 01:59:58,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:58,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 01:59:58,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 01:59:58,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1602123832, now seen corresponding path program 1 times [2021-10-16 01:59:58,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:58,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572055576] [2021-10-16 01:59:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:58,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:58,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572055576] [2021-10-16 01:59:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572055576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:58,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 01:59:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62645283] [2021-10-16 01:59:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 01:59:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 01:59:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 01:59:58,158 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:58,215 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-16 01:59:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 01:59:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 01:59:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:58,216 INFO L225 Difference]: With dead ends: 19 [2021-10-16 01:59:58,216 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 01:59:58,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:59:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 01:59:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-10-16 01:59:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-16 01:59:58,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2021-10-16 01:59:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:58,221 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-16 01:59:58,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-16 01:59:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 01:59:58,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:58,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:58,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 01:59:58,223 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1873767508, now seen corresponding path program 1 times [2021-10-16 01:59:58,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:58,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034435118] [2021-10-16 01:59:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:58,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034435118] [2021-10-16 01:59:58,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034435118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:58,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:58,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:59:58,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081659096] [2021-10-16 01:59:58,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:59:58,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:59:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:58,295 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:58,311 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-10-16 01:59:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:59:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-10-16 01:59:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:58,313 INFO L225 Difference]: With dead ends: 14 [2021-10-16 01:59:58,313 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 01:59:58,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 01:59:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 01:59:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-16 01:59:58,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-16 01:59:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:58,317 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-16 01:59:58,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-16 01:59:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 01:59:58,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:58,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:58,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 01:59:58,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 01:59:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 937389987, now seen corresponding path program 1 times [2021-10-16 01:59:58,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:58,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055454474] [2021-10-16 01:59:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:58,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:58,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055454474] [2021-10-16 01:59:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055454474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:59:58,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38915411] [2021-10-16 01:59:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:58,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:58,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:58,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:58,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 01:59:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 01:59:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:58,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-10-16 01:59:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38915411] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:58,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304184952] [2021-10-16 01:59:58,769 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 01:59:58,770 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 01:59:58,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 01:59:58,780 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 01:59:58,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 01:59:58,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,819 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:59:58,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 01:59:58,826 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:59:58,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-16 01:59:58,828 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:59:58,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-16 01:59:58,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-16 01:59:58,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 01:59:58,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 01:59:58,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 01:59:58,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 01:59:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:59:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2021-10-16 01:59:58,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 01:59:58,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 01:59:58,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 01:59:58,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 01:59:58,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:58,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-16 01:59:58,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 01:59:58,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:114, output treesize:57 [2021-10-16 01:59:58,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:59,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:59,103 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_21| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 01:59:59,108 INFO L168 Benchmark]: Toolchain (without parser) took 3357.92 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 73.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:59,118 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:59:59,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.83 ms. Allocated memory is still 102.8 MB. Free memory was 60.1 MB in the beginning and 70.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:59,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.27 ms. Allocated memory is still 102.8 MB. Free memory was 70.0 MB in the beginning and 68.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:59,119 INFO L168 Benchmark]: Boogie Preprocessor took 61.71 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 67.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:59:59,120 INFO L168 Benchmark]: RCFGBuilder took 587.48 ms. Allocated memory is still 102.8 MB. Free memory was 67.0 MB in the beginning and 54.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:59,121 INFO L168 Benchmark]: TraceAbstraction took 2133.32 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 53.6 MB in the beginning and 73.3 MB in the end (delta: -19.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:59,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 486.83 ms. Allocated memory is still 102.8 MB. Free memory was 60.1 MB in the beginning and 70.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.27 ms. Allocated memory is still 102.8 MB. Free memory was 70.0 MB in the beginning and 68.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.71 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 67.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 587.48 ms. Allocated memory is still 102.8 MB. Free memory was 67.0 MB in the beginning and 54.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2133.32 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 53.6 MB in the beginning and 73.3 MB in the end (delta: -19.7 MB). Peak memory consumption was 3.4 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_21| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_21|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 01:59:59,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:00:01,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:00:01,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:00:01,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:00:01,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:00:01,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:00:01,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:00:01,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:00:01,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:00:01,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:00:01,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:00:01,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:00:01,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:00:01,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:00:01,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:00:01,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:00:01,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:00:01,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:00:01,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:00:01,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:00:01,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:00:01,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:00:01,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:00:01,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:00:01,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:00:01,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:00:01,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:00:01,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:00:01,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:00:01,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:00:01,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:00:01,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:00:01,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:00:01,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:00:01,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:00:01,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:00:01,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:00:01,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:00:01,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:00:01,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:00:01,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:00:01,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:00:01,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:00:01,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:00:01,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:00:01,874 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:00:01,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:00:01,875 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:00:01,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:00:01,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:00:01,875 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:00:01,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:00:01,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:00:01,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:00:01,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:00:01,880 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:00:01,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:00:01,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:00:01,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:00:01,881 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:00:01,881 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:00:01,881 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:00:01,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:00:01,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:00:01,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:00:01,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:00:01,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:00:01,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:00:01,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:00:01,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:00:01,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:00:01,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:00:01,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:00:01,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:00:01,886 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:00:01,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:01,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:00:01,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:00:01,887 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_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9da884533d6d47d95abcc742a22337ea753025b [2021-10-16 02:00:02,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:00:02,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:00:02,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:00:02,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:00:02,383 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:00:02,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-16 02:00:02,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9e4e3828c/0e1bba97550349d880eef56dff127946/FLAGa9f81cc16 [2021-10-16 02:00:03,077 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:00:03,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-16 02:00:03,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9e4e3828c/0e1bba97550349d880eef56dff127946/FLAGa9f81cc16 [2021-10-16 02:00:03,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/data/9e4e3828c/0e1bba97550349d880eef56dff127946 [2021-10-16 02:00:03,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:00:03,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:00:03,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:00:03,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:00:03,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:00:03,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:03,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2946a245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03, skipping insertion in model container [2021-10-16 02:00:03,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:03,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:00:03,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:00:03,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:00:03,903 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:00:03,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:00:03,974 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:00:03,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03 WrapperNode [2021-10-16 02:00:03,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:00:03,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:00:03,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:00:03,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:00:03,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:00:04,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:00:04,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:00:04,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:00:04,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:00:04,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:00:04,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:00:04,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:00:04,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (1/1) ... [2021-10-16 02:00:04,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:00:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:04,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:00:04,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:00:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-16 02:00:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:00:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-16 02:00:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:00:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:00:04,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:00:04,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:00:04,500 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:00:04,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:00:04 BoogieIcfgContainer [2021-10-16 02:00:04,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:00:04,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:00:04,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:00:04,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:00:04,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:00:03" (1/3) ... [2021-10-16 02:00:04,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248d98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:00:04, skipping insertion in model container [2021-10-16 02:00:04,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:03" (2/3) ... [2021-10-16 02:00:04,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248d98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:00:04, skipping insertion in model container [2021-10-16 02:00:04,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:00:04" (3/3) ... [2021-10-16 02:00:04,528 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-10-16 02:00:04,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:00:04,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 02:00:04,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:00:04,594 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:00:04,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:00:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:00:04,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:04,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:00:04,617 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-10-16 02:00:04,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:04,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419827093] [2021-10-16 02:00:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:04,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:04,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:04,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:00:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:00:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:04,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:04,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:04,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419827093] [2021-10-16 02:00:04,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419827093] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:04,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:04,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:00:04,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515456780] [2021-10-16 02:00:04,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:00:04,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:00:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:00:04,965 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:05,084 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-16 02:00:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:00:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:00:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:05,096 INFO L225 Difference]: With dead ends: 40 [2021-10-16 02:00:05,096 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:00:05,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:00:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:00:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-10-16 02:00:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-16 02:00:05,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2021-10-16 02:00:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:05,142 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-16 02:00:05,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-16 02:00:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:00:05,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:05,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:00:05,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:00:05,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:05,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-10-16 02:00:05,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:05,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97932739] [2021-10-16 02:00:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:05,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:05,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:05,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:00:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:00:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:05,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:05,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:05,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:05,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97932739] [2021-10-16 02:00:05,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97932739] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:05,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:05,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:00:05,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050129634] [2021-10-16 02:00:05,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:00:05,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:00:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:00:05,547 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:05,604 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-16 02:00:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:00:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:00:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:05,606 INFO L225 Difference]: With dead ends: 22 [2021-10-16 02:00:05,607 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 02:00:05,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:00:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 02:00:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-16 02:00:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-16 02:00:05,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-10-16 02:00:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-16 02:00:05,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-16 02:00:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:00:05,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:05,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:00:05,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:05,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:05,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-10-16 02:00:05,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:05,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851409349] [2021-10-16 02:00:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:05,834 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:05,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:05,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:00:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:00:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:05,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:05,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:06,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:06,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851409349] [2021-10-16 02:00:06,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851409349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:06,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:06,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:00:06,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714690156] [2021-10-16 02:00:06,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:00:06,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:00:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:00:06,140 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:06,344 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-16 02:00:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:00:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:00:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:06,347 INFO L225 Difference]: With dead ends: 31 [2021-10-16 02:00:06,347 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:00:06,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:00:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:00:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-10-16 02:00:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-16 02:00:06,352 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-10-16 02:00:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:06,352 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-16 02:00:06,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-16 02:00:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:00:06,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:06,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:00:06,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:06,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:06,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-10-16 02:00:06,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:06,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428292102] [2021-10-16 02:00:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:06,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:06,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:06,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:00:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:00:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2021-10-16 02:00:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:06,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:06,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:06,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428292102] [2021-10-16 02:00:06,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428292102] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:06,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:06,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:00:06,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541514130] [2021-10-16 02:00:06,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:00:06,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:00:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:00:06,902 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:07,139 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-16 02:00:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:00:07,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:00:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:07,141 INFO L225 Difference]: With dead ends: 35 [2021-10-16 02:00:07,141 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:00:07,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:00:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:00:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-10-16 02:00:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-16 02:00:07,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-10-16 02:00:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:07,145 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-16 02:00:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-16 02:00:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:00:07,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:07,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:07,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:07,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:07,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-10-16 02:00:07,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:07,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665799506] [2021-10-16 02:00:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:07,348 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:07,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:07,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:00:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:07,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:00:07,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:07,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:07,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:07,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:07,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665799506] [2021-10-16 02:00:07,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665799506] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:07,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:07,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:00:07,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448650096] [2021-10-16 02:00:07,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:00:07,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:00:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:00:07,540 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:07,605 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-16 02:00:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:00:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:00:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:07,606 INFO L225 Difference]: With dead ends: 22 [2021-10-16 02:00:07,606 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 02:00:07,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:00:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 02:00:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-16 02:00:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-16 02:00:07,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2021-10-16 02:00:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:07,615 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-16 02:00:07,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-10-16 02:00:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:00:07,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:07,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:07,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:07,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:07,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:07,832 INFO L82 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-10-16 02:00:07,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:07,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016992000] [2021-10-16 02:00:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:07,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:07,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:00:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:00:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:08,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:08,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:08,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016992000] [2021-10-16 02:00:08,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016992000] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:08,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:08,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:00:08,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125146010] [2021-10-16 02:00:08,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:00:08,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:00:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:00:08,185 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:08,538 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-16 02:00:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:00:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:00:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:08,540 INFO L225 Difference]: With dead ends: 38 [2021-10-16 02:00:08,540 INFO L226 Difference]: Without dead ends: 38 [2021-10-16 02:00:08,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:00:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-16 02:00:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2021-10-16 02:00:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-16 02:00:08,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-10-16 02:00:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:08,545 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-16 02:00:08,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-16 02:00:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:00:08,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:08,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:08,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:08,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2021-10-16 02:00:08,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:08,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854032861] [2021-10-16 02:00:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:08,756 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:08,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:08,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:00:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:00:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:08,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-10-16 02:00:08,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-10-16 02:00:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:09,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-10-16 02:00:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-10-16 02:00:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:09,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:09,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854032861] [2021-10-16 02:00:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854032861] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:09,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:09,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2021-10-16 02:00:09,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253058257] [2021-10-16 02:00:09,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:00:09,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:00:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:00:09,063 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:09,231 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-16 02:00:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:00:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 10 [2021-10-16 02:00:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:09,233 INFO L225 Difference]: With dead ends: 31 [2021-10-16 02:00:09,233 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:00:09,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:00:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:00:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-10-16 02:00:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-16 02:00:09,236 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-10-16 02:00:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:09,237 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-16 02:00:09,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-16 02:00:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:00:09,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:09,238 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:09,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:09,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:09,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-10-16 02:00:09,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:09,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136772831] [2021-10-16 02:00:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:09,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:09,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:09,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:00:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:00:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:09,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:09,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:10,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:10,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136772831] [2021-10-16 02:00:10,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136772831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:10,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1195364545] [2021-10-16 02:00:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:10,402 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:10,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:10,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:00:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:00:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:10,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:10,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1195364545] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:10,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401144228] [2021-10-16 02:00:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:10,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:10,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:10,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:00:11,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:00:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:00:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:11,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:11,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401144228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:12,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:00:12,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 5] total 13 [2021-10-16 02:00:12,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003709696] [2021-10-16 02:00:12,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:00:12,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:00:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:00:12,344 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:14,237 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-16 02:00:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:00:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:00:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:14,240 INFO L225 Difference]: With dead ends: 79 [2021-10-16 02:00:14,240 INFO L226 Difference]: Without dead ends: 79 [2021-10-16 02:00:14,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2331.7ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:00:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-16 02:00:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 39. [2021-10-16 02:00:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-16 02:00:14,246 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 10 [2021-10-16 02:00:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:14,246 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-16 02:00:14,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-16 02:00:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:00:14,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:14,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:14,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:14,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:14,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:14,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:14,850 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2021-10-16 02:00:14,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:14,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149024161] [2021-10-16 02:00:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:14,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:14,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:14,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:00:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:00:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:14,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:15,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:00:15,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:00:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:00:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:15,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:15,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-16 02:00:15,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-10-16 02:00:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:15,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149024161] [2021-10-16 02:00:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149024161] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296697205] [2021-10-16 02:00:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:15,949 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:15,960 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:00:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:16,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:00:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:16,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:00:16,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:00:16,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:00:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:16,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-16 02:00:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-10-16 02:00:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:16,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296697205] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:16,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668806097] [2021-10-16 02:00:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:16,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:16,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:00:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:00:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:00:17,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:17,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:00:17,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:00:17,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:00:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:17,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:17,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-16 02:00:17,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-10-16 02:00:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:17,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668806097] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:17,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:00:17,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6, 7, 6] total 15 [2021-10-16 02:00:17,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461002603] [2021-10-16 02:00:17,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:00:17,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:00:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:00:17,745 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:18,679 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-10-16 02:00:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:00:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:00:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:18,681 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:00:18,681 INFO L226 Difference]: Without dead ends: 51 [2021-10-16 02:00:18,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1657.2ms TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:00:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-16 02:00:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-10-16 02:00:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.275) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-10-16 02:00:18,687 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 10 [2021-10-16 02:00:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:18,688 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-10-16 02:00:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-10-16 02:00:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:00:18,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:18,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:18,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:19,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:19,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:19,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2021-10-16 02:00:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:19,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375224750] [2021-10-16 02:00:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:19,310 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:19,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:19,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:00:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:00:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:19,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:23,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:23,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375224750] [2021-10-16 02:00:23,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375224750] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:23,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:00:23,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-10-16 02:00:23,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133942150] [2021-10-16 02:00:23,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:00:23,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:00:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2021-10-16 02:00:23,829 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:23,932 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-10-16 02:00:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:00:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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 12 [2021-10-16 02:00:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:23,933 INFO L225 Difference]: With dead ends: 42 [2021-10-16 02:00:23,933 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:00:23,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4171.5ms TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2021-10-16 02:00:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:00:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:00:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-16 02:00:23,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2021-10-16 02:00:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:23,938 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-16 02:00:23,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-16 02:00:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:00:23,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:23,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:23,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:24,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:24,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:24,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1305892995, now seen corresponding path program 2 times [2021-10-16 02:00:24,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:24,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012821643] [2021-10-16 02:00:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:00:24,149 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:24,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:24,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:24,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:00:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:00:24,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:00:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:24,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:00:24,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:25,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:25,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012821643] [2021-10-16 02:00:25,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012821643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:25,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324282467] [2021-10-16 02:00:25,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:00:25,658 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:25,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:25,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:00:25,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:00:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:00:25,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:26,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-16 02:00:26,318 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-10-16 02:00:26,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2021-10-16 02:00:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:00:26,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-10-16 02:00:26,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-10-16 02:00:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:00:26,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324282467] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:00:26,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:00:26,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [7, 8] total 24 [2021-10-16 02:00:26,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27929897] [2021-10-16 02:00:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:00:26,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:00:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:00:26,921 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:27,578 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-16 02:00:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:00:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 14 [2021-10-16 02:00:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:27,580 INFO L225 Difference]: With dead ends: 37 [2021-10-16 02:00:27,580 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:00:27,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1948.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-10-16 02:00:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:00:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:00:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-16 02:00:27,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2021-10-16 02:00:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:27,585 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-16 02:00:27,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-16 02:00:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:00:27,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:27,586 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:27,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:27,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:27,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 785413830, now seen corresponding path program 1 times [2021-10-16 02:00:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:27,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063138886] [2021-10-16 02:00:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:27,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:27,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:27,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:00:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:00:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:28,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:30,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:30,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063138886] [2021-10-16 02:00:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063138886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:30,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426216748] [2021-10-16 02:00:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:30,825 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:30,825 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:30,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:00:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:00:31,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:31,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-16 02:00:32,077 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-10-16 02:00:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-10-16 02:00:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:00:32,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-10-16 02:00:32,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-16 02:00:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:00:33,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426216748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744937310] [2021-10-16 02:00:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:00:33,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:33,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:00:33,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:00:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:00:33,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 02:00:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:33,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:35,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744937310] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:35,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:00:35,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 9] total 45 [2021-10-16 02:00:35,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734197845] [2021-10-16 02:00:35,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-16 02:00:35,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-16 02:00:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-10-16 02:00:35,244 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:37,496 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-10-16 02:00:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:00:37,498 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 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 18 [2021-10-16 02:00:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:37,499 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:00:37,499 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:00:37,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 5838.6ms TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2021-10-16 02:00:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:00:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:00:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-10-16 02:00:37,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-10-16 02:00:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:37,505 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-10-16 02:00:37,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-10-16 02:00:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:00:37,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:37,506 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-16 02:00:37,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:37,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-16 02:00:37,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:38,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:00:38,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:00:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-10-16 02:00:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:38,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551631947] [2021-10-16 02:00:38,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:00:38,124 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:38,124 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:38,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:00:38,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:00:38,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:00:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:38,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:38,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:41,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:41,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551631947] [2021-10-16 02:00:41,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551631947] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:41,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880521371] [2021-10-16 02:00:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:00:41,002 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:41,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:41,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:00:41,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:00:41,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:00:41,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:41,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [880521371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:45,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100808088] [2021-10-16 02:00:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:00:45,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:45,244 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:00:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:00:45,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:00:45,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:00:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:00:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:46,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:48,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100808088] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:48,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:00:48,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9, 9, 9] total 34 [2021-10-16 02:00:48,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57012343] [2021-10-16 02:00:48,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-16 02:00:48,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-16 02:00:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:00:48,619 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:12,098 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2021-10-16 02:01:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 02:01:12,101 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 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 22 [2021-10-16 02:01:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:12,103 INFO L225 Difference]: With dead ends: 137 [2021-10-16 02:01:12,103 INFO L226 Difference]: Without dead ends: 137 [2021-10-16 02:01:12,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 21457.2ms TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2021-10-16 02:01:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-16 02:01:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 57. [2021-10-16 02:01:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-10-16 02:01:12,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 22 [2021-10-16 02:01:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:12,113 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-10-16 02:01:12,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-10-16 02:01:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:01:12,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:01:12,115 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:01:12,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:12,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:12,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:12,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:01:12,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:01:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:01:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 2 times [2021-10-16 02:01:12,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:01:12,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368851145] [2021-10-16 02:01:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:01:12,754 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:01:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:01:12,754 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:01:12,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 02:01:13,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:01:13,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:01:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:01:13,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:01:13,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:01:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:01:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:13,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-10-16 02:01:14,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-10-16 02:01:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:16,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:01:16,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368851145] [2021-10-16 02:01:16,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368851145] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:16,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712080296] [2021-10-16 02:01:16,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:01:16,264 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:01:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:01:16,265 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:01:16,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 02:01:16,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:01:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-16 02:01:16,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-10-16 02:01:18,136 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-10-16 02:01:18,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-10-16 02:01:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:18,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-10-16 02:01:18,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-16 02:01:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712080296] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:20,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42227748] [2021-10-16 02:01:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:01:20,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:01:20,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:01:20,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:01:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 02:01:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:01:21,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:01:21,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:21,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:01:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:01:22,790 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-16 02:01:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2021-10-16 02:01:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:22,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-10-16 02:01:23,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-16 02:01:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:26,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42227748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:26,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:01:26,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14, 13, 14, 13] total 61 [2021-10-16 02:01:26,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810352319] [2021-10-16 02:01:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-10-16 02:01:26,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:01:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-10-16 02:01:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3301, Unknown=0, NotChecked=0, Total=3660 [2021-10-16 02:01:26,803 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 61 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:37,668 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-10-16 02:01:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 02:01:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 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 22 [2021-10-16 02:01:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:37,672 INFO L225 Difference]: With dead ends: 73 [2021-10-16 02:01:37,672 INFO L226 Difference]: Without dead ends: 65 [2021-10-16 02:01:37,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 18182.3ms TimeCoverageRelationStatistics Valid=1006, Invalid=5966, Unknown=0, NotChecked=0, Total=6972 [2021-10-16 02:01:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-16 02:01:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-16 02:01:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-10-16 02:01:37,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 22 [2021-10-16 02:01:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-10-16 02:01:37,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-10-16 02:01:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:01:37,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:01:37,701 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:01:37,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-16 02:01:37,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:38,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:38,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:01:38,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:01:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:01:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1326296016, now seen corresponding path program 3 times [2021-10-16 02:01:38,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:01:38,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600933270] [2021-10-16 02:01:38,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:01:38,307 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:01:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:01:38,308 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:01:38,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:01:39,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-16 02:01:39,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-16 02:01:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:39,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:01:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:40,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:45,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:01:45,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600933270] [2021-10-16 02:01:45,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600933270] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:45,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239750979] [2021-10-16 02:01:45,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:01:45,619 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:01:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:01:45,619 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:01:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:01:46,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-16 02:01:46,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:01:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:01:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-16 02:01:47,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:01:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:01:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-16 02:01:48,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-10-16 02:01:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 56 [2021-10-16 02:02:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-16 02:02:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239750979] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:02:00,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230585389] [2021-10-16 02:02:00,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:02:00,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:02:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:02:00,732 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:02:00,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 02:02:01,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-16 02:02:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:02:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 02:02:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:02:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:02:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-10-16 02:02:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:02:02,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:02:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:02:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230585389] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:02:07,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:02:07,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 7, 6, 16, 16] total 58 [2021-10-16 02:02:07,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124675957] [2021-10-16 02:02:07,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-16 02:02:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:02:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-16 02:02:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2929, Unknown=2, NotChecked=0, Total=3306 [2021-10-16 02:02:07,584 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:40,955 WARN L207 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-10-16 02:02:48,166 WARN L207 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-10-16 02:03:07,880 WARN L207 SmtUtils]: Spent 16.84 s on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-10-16 02:03:35,590 WARN L207 SmtUtils]: Spent 16.89 s on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2021-10-16 02:03:42,744 WARN L207 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 105 DAG size of output: 65 [2021-10-16 02:04:05,101 WARN L207 SmtUtils]: Spent 16.95 s on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2021-10-16 02:04:19,639 WARN L207 SmtUtils]: Spent 7.48 s on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-10-16 02:04:42,758 WARN L207 SmtUtils]: Spent 18.43 s on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2021-10-16 02:04:49,470 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-10-16 02:05:08,727 WARN L207 SmtUtils]: Spent 16.33 s on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-10-16 02:05:30,668 WARN L207 SmtUtils]: Spent 16.78 s on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-10-16 02:05:36,958 WARN L207 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2021-10-16 02:05:58,253 WARN L207 SmtUtils]: Spent 16.17 s on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2021-10-16 02:06:21,730 WARN L207 SmtUtils]: Spent 17.84 s on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2021-10-16 02:06:28,092 WARN L207 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 110 DAG size of output: 62 [2021-10-16 02:06:48,523 WARN L207 SmtUtils]: Spent 16.37 s on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-10-16 02:07:10,075 WARN L207 SmtUtils]: Spent 17.20 s on a formula simplification. DAG size of input: 111 DAG size of output: 94 [2021-10-16 02:07:33,115 WARN L207 SmtUtils]: Spent 16.76 s on a formula simplification. DAG size of input: 112 DAG size of output: 85 [2021-10-16 02:07:59,136 WARN L207 SmtUtils]: Spent 18.98 s on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-10-16 02:08:20,476 WARN L207 SmtUtils]: Spent 17.25 s on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-10-16 02:08:43,988 WARN L207 SmtUtils]: Spent 17.66 s on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2021-10-16 02:09:06,965 WARN L207 SmtUtils]: Spent 18.13 s on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-16 02:09:31,599 WARN L207 SmtUtils]: Spent 17.96 s on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-10-16 02:10:01,094 WARN L207 SmtUtils]: Spent 17.02 s on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-10-16 02:10:32,781 WARN L207 SmtUtils]: Spent 23.33 s on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2021-10-16 02:10:54,341 WARN L207 SmtUtils]: Spent 16.45 s on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-10-16 02:11:21,696 WARN L207 SmtUtils]: Spent 17.14 s on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2021-10-16 02:11:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:11:23,295 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-10-16 02:11:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-16 02:11:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-16 02:11:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:11:23,297 INFO L225 Difference]: With dead ends: 104 [2021-10-16 02:11:23,297 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:11:23,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 561894.2ms TimeCoverageRelationStatistics Valid=2429, Invalid=9336, Unknown=7, NotChecked=0, Total=11772 [2021-10-16 02:11:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:11:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-16 02:11:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:11:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-16 02:11:23,307 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 34 [2021-10-16 02:11:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:11:23,307 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-16 02:11:23,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:11:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-16 02:11:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-16 02:11:23,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:11:23,310 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-10-16 02:11:23,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:11:23,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:11:23,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:11:23,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:11:23,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-10-16 02:11:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:11:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-10-16 02:11:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:11:23,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100647819] [2021-10-16 02:11:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:11:23,934 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:11:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:11:23,934 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:11:23,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:11:24,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:11:24,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:11:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:11:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:11:24,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:11:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-16 02:11:25,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:11:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-16 02:11:41,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:11:41,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100647819] [2021-10-16 02:11:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100647819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:11:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770409749] [2021-10-16 02:11:41,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:11:41,578 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:11:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:11:41,582 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:11:41,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 02:11:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:11:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:11:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:11:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:11:42,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:11:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-16 02:11:44,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:11:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-16 02:11:59,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770409749] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:11:59,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009485473] [2021-10-16 02:11:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:11:59,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:11:59,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:11:59,219 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:11:59,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-16 02:12:00,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:12:00,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:12:00,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:12:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:12:00,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:12:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-16 02:12:01,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:12:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-10-16 02:12:15,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009485473] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:12:15,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:12:15,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 16 [2021-10-16 02:12:15,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110919787] [2021-10-16 02:12:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-16 02:12:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:12:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-16 02:12:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:12:15,102 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:12:16,966 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-10-16 02:12:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:12:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 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 46 [2021-10-16 02:12:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:12:16,969 INFO L225 Difference]: With dead ends: 46 [2021-10-16 02:12:16,969 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:12:16,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3796.4ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:12:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:12:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:12:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:12:16,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-10-16 02:12:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:12:16,971 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:12:16,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:12:16,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:12:16,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:12:16,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:12:16,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 02:12:16,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 02:12:16,976 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:12:16,976 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:12:16,976 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:12:16,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:17,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:17,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:17,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:17,584 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:12:17,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:12:17 BoogieIcfgContainer [2021-10-16 02:12:17,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:12:17,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:12:17,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:12:17,589 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:12:17,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:00:04" (3/4) ... [2021-10-16 02:12:17,593 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:12:17,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-16 02:12:17,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-16 02:12:17,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-16 02:12:17,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:12:17,647 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:12:17,648 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:12:17,649 INFO L168 Benchmark]: Toolchain (without parser) took 734229.54 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 41.6 MB in the beginning and 20.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,649 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 43.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:12:17,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.74 ms. Allocated memory is still 62.9 MB. Free memory was 41.2 MB in the beginning and 40.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.43 ms. Allocated memory is still 62.9 MB. Free memory was 40.1 MB in the beginning and 38.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:12:17,651 INFO L168 Benchmark]: Boogie Preprocessor took 33.33 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,651 INFO L168 Benchmark]: RCFGBuilder took 446.56 ms. Allocated memory is still 62.9 MB. Free memory was 36.9 MB in the beginning and 26.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,652 INFO L168 Benchmark]: TraceAbstraction took 733082.98 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 25.9 MB in the beginning and 23.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,653 INFO L168 Benchmark]: Witness Printer took 59.64 ms. Allocated memory is still 94.4 MB. Free memory was 23.7 MB in the beginning and 20.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:12:17,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 43.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 552.74 ms. Allocated memory is still 62.9 MB. Free memory was 41.2 MB in the beginning and 40.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.43 ms. Allocated memory is still 62.9 MB. Free memory was 40.1 MB in the beginning and 38.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.33 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 446.56 ms. Allocated memory is still 62.9 MB. Free memory was 36.9 MB in the beginning and 26.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 733082.98 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 25.9 MB in the beginning and 23.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. * Witness Printer took 59.64 ms. Allocated memory is still 94.4 MB. Free memory was 23.7 MB in the beginning and 20.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 732997.5ms, OverallIterations: 16, TraceHistogramMax: 11, EmptinessCheckTime: 24.3ms, AutomataDifference: 599071.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 175 SDtfs, 2071 SDslu, 808 SDs, 0 SdLazy, 2573 SolverSat, 518 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 23840.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1227 GetRequests, 788 SyntacticMatches, 14 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7179 ImplicationChecksByTransitivity, 622141.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=14, InterpolantAutomatonStates: 217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 101.8ms AutomataMinimizationTime, 16 MinimizatonAttempts, 181 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 188.8ms SsaConstructionTime, 1478.1ms SatisfiabilityAnalysisTime, 116089.5ms InterpolantComputationTime, 576 NumberOfCodeBlocks, 468 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 1090 ConstructedInterpolants, 164 QuantifiedInterpolants, 21562 SizeOfPredicates, 238 NumberOfNonLiveVariables, 1514 ConjunctsInSsa, 474 ConjunctsInUnsatCore, 62 InterpolantComputations, 18 PerfectInterpolantSequences, 1282/1982 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-16 02:12:17,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a2b3e2-5690-485e-a41e-81bfbdf7435c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...