./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c --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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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 1b1751fe95f9cf655681429038c1cde9e9c074e8 ...................................................................................................................................................................................................................................................................................................................................................................................................... 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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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 1b1751fe95f9cf655681429038c1cde9e9c074e8 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:15:15,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:15:15,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:15:15,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:15:15,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:15:15,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:15:15,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:15:15,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:15:15,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:15:15,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:15:15,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:15:15,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:15:15,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:15:15,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:15:15,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:15:15,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:15:15,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:15:15,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:15:15,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:15:15,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:15:15,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:15:15,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:15:15,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:15:15,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:15:15,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:15:15,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:15:15,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:15:15,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:15:15,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:15:15,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:15:15,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:15:15,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:15:15,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:15:15,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:15:15,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:15:15,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:15:15,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:15:15,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:15:15,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:15:15,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:15:15,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:15:15,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:15:15,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:15:15,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:15:15,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:15:15,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:15:15,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:15:15,655 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:15:15,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:15:15,656 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:15:15,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:15:15,656 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:15:15,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:15:15,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:15:15,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:15:15,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:15:15,659 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:15:15,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:15:15,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:15:15,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:15:15,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:15:15,661 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:15:15,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:15:15,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:15:15,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:15:15,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:15:15,662 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:15:15,662 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:15:15,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:15:15,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:15:15,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:15:15,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:15:15,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:15:15,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:15:15,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:15:15,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:15:15,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:15:15,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:15:15,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:15:15,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:15:15,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:15:15,666 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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b1751fe95f9cf655681429038c1cde9e9c074e8 [2021-10-16 03:15:15,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:15:15,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:15:15,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:15:15,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:15:15,986 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:15:15,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2021-10-16 03:15:16,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/a6e866de8/3b7d5de104cf4517bac3ee9ebbca3c6f/FLAGe8ba5419b [2021-10-16 03:15:16,527 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:15:16,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2021-10-16 03:15:16,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/a6e866de8/3b7d5de104cf4517bac3ee9ebbca3c6f/FLAGe8ba5419b [2021-10-16 03:15:16,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/a6e866de8/3b7d5de104cf4517bac3ee9ebbca3c6f [2021-10-16 03:15:16,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:15:16,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:15:16,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:15:16,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:15:16,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:15:16,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:15:16" (1/1) ... [2021-10-16 03:15:16,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2acd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:16, skipping insertion in model container [2021-10-16 03:15:16,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:15:16" (1/1) ... [2021-10-16 03:15:16,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:15:16,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:15:17,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:15:17,146 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:15:17,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:15:17,175 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:15:17,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17 WrapperNode [2021-10-16 03:15:17,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:15:17,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:15:17,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:15:17,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:15:17,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:15:17,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:15:17,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:15:17,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:15:17,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:15:17,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:15:17,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:15:17,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:15:17,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (1/1) ... [2021-10-16 03:15:17,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:15:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:17,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:15:17,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:15:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:15:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:15:17,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:15:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:15:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:15:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:15:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:15:17,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:15:17,628 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:15:17,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:15:17 BoogieIcfgContainer [2021-10-16 03:15:17,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:15:17,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:15:17,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:15:17,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:15:17,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:15:16" (1/3) ... [2021-10-16 03:15:17,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517cd9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:15:17, skipping insertion in model container [2021-10-16 03:15:17,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:17" (2/3) ... [2021-10-16 03:15:17,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517cd9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:15:17, skipping insertion in model container [2021-10-16 03:15:17,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:15:17" (3/3) ... [2021-10-16 03:15:17,647 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2021-10-16 03:15:17,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:15:17,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-16 03:15:17,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:15:17,745 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 03:15:17,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 03:15:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 6 states have (on average 2.1666666666666665) 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 03:15:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:15:17,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:17,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:15:17,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2021-10-16 03:15:17,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:15:17,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752927310] [2021-10-16 03:15:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:17,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:15:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:17,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:15:17,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752927310] [2021-10-16 03:15:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752927310] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:15:17,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:15:17,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:15:17,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397835123] [2021-10-16 03:15:17,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:15:17,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:15:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:15:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:17,997 INFO L87 Difference]: Start difference. First operand has 12 states, 6 states have (on average 2.1666666666666665) 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) 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 03:15:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:18,024 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-16 03:15:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:15:18,026 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 03:15:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:18,033 INFO L225 Difference]: With dead ends: 11 [2021-10-16 03:15:18,033 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 03:15:18,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 03:15:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 03:15:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.8333333333333333) 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 03:15:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-16 03:15:18,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2021-10-16 03:15:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:18,062 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-16 03:15:18,063 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 03:15:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-16 03:15:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:15:18,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:18,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:15:18,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:15:18,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2021-10-16 03:15:18,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:15:18,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488944314] [2021-10-16 03:15:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:18,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:15:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:18,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:15:18,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488944314] [2021-10-16 03:15:18,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488944314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:15:18,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:15:18,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:15:18,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677924291] [2021-10-16 03:15:18,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:15:18,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:15:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:15:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:18,127 INFO L87 Difference]: Start difference. First operand 10 states and 11 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 03:15:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:18,144 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-16 03:15:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:15:18,145 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 03:15:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:18,145 INFO L225 Difference]: With dead ends: 12 [2021-10-16 03:15:18,145 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 03:15:18,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 03:15:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-16 03:15:18,148 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 03:15:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-16 03:15:18,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2021-10-16 03:15:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:18,150 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-16 03:15:18,150 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 03:15:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-16 03:15:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:15:18,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:18,151 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-16 03:15:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:15:18,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:18,152 INFO L82 PathProgramCache]: Analyzing trace with hash 72375155, now seen corresponding path program 1 times [2021-10-16 03:15:18,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:15:18,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740084177] [2021-10-16 03:15:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:18,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:15:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:18,289 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 03:15:18,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:15:18,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740084177] [2021-10-16 03:15:18,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740084177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:15:18,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874729129] [2021-10-16 03:15:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:18,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:18,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:18,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:15:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:15:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:18,481 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 03:15:18,483 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 03:15:18,611 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 03:15:18,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:18,725 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 03:15:18,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874729129] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:18,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417751389] [2021-10-16 03:15:18,764 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-16 03:15:18,764 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:15:18,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:15:18,780 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:15:18,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:15:18,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,839 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:15:18,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 03:15:18,845 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:15:18,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-16 03:15:18,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-16 03:15:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:18,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:18,928 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 03:15:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 41 [2021-10-16 03:15:18,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-16 03:15:18,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-16 03:15:18,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:15:18,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:15:18,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,996 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:18,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-16 03:15:18,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:15:18,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:116 [2021-10-16 03:15:19,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:19,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:19,216 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_22| 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 03:15:19,220 INFO L168 Benchmark]: Toolchain (without parser) took 2307.88 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 77.5 MB in the beginning and 98.6 MB in the end (delta: -21.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:19,220 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:19,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.90 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 77.2 MB in the beginning and 113.9 MB in the end (delta: -36.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:19,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.69 ms. Allocated memory is still 138.4 MB. Free memory was 113.9 MB in the beginning and 112.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:19,222 INFO L168 Benchmark]: Boogie Preprocessor took 24.91 ms. Allocated memory is still 138.4 MB. Free memory was 112.3 MB in the beginning and 111.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:19,223 INFO L168 Benchmark]: RCFGBuilder took 395.12 ms. Allocated memory is still 138.4 MB. Free memory was 111.3 MB in the beginning and 99.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:19,223 INFO L168 Benchmark]: TraceAbstraction took 1585.19 ms. Allocated memory is still 138.4 MB. Free memory was 98.7 MB in the beginning and 98.6 MB in the end (delta: 127.8 kB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:19,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.90 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 77.2 MB in the beginning and 113.9 MB in the end (delta: -36.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.69 ms. Allocated memory is still 138.4 MB. Free memory was 113.9 MB in the beginning and 112.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.91 ms. Allocated memory is still 138.4 MB. Free memory was 112.3 MB in the beginning and 111.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 395.12 ms. Allocated memory is still 138.4 MB. Free memory was 111.3 MB in the beginning and 99.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1585.19 ms. Allocated memory is still 138.4 MB. Free memory was 98.7 MB in the beginning and 98.6 MB in the end (delta: 127.8 kB). Peak memory consumption was 2.7 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_22| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_22|: 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 03:15:19,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:15:21,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:15:21,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:15:21,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:15:21,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:15:21,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:15:21,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:15:21,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:15:21,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:15:21,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:15:21,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:15:21,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:15:21,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:15:21,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:15:21,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:15:21,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:15:21,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:15:21,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:15:21,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:15:21,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:15:21,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:15:21,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:15:21,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:15:21,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:15:21,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:15:21,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:15:21,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:15:21,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:15:21,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:15:21,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:15:21,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:15:21,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:15:21,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:15:21,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:15:21,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:15:21,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:15:21,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:15:21,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:15:21,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:15:21,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:15:21,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:15:21,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 03:15:21,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:15:21,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:15:21,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:15:21,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:15:21,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:15:21,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:15:21,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:15:21,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:15:21,840 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:15:21,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:15:21,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:15:21,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:15:21,842 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:15:21,842 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:15:21,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:15:21,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:15:21,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:15:21,843 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:15:21,843 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:15:21,843 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:15:21,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:15:21,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:15:21,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:15:21,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:15:21,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:15:21,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:15:21,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:15:21,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:15:21,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:15:21,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:15:21,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:15:21,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:15:21,847 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:15:21,847 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:21,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:15:21,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:15:21,848 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_86c13bd3-aa9b-47e3-9b2d-3932a658a194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b1751fe95f9cf655681429038c1cde9e9c074e8 [2021-10-16 03:15:22,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:15:22,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:15:22,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:15:22,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:15:22,251 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:15:22,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2021-10-16 03:15:22,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/dac37f29c/89ff73b73d5e4567a522f092affc8d8a/FLAG9b6159abc [2021-10-16 03:15:22,874 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:15:22,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2021-10-16 03:15:22,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/dac37f29c/89ff73b73d5e4567a522f092affc8d8a/FLAG9b6159abc [2021-10-16 03:15:23,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/data/dac37f29c/89ff73b73d5e4567a522f092affc8d8a [2021-10-16 03:15:23,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:15:23,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:15:23,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:15:23,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:15:23,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:15:23,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c64a98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23, skipping insertion in model container [2021-10-16 03:15:23,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:15:23,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:15:23,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:15:23,521 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:15:23,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:15:23,582 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:15:23,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23 WrapperNode [2021-10-16 03:15:23,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:15:23,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:15:23,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:15:23,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:15:23,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:15:23,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:15:23,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:15:23,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:15:23,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:15:23,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:15:23,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:15:23,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:15:23,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (1/1) ... [2021-10-16 03:15:23,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:15:23,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:23,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:15:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:15:23,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:15:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:15:23,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:15:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:15:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:15:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:15:23,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:15:24,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:15:24,038 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:15:24,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:15:24 BoogieIcfgContainer [2021-10-16 03:15:24,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:15:24,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:15:24,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:15:24,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:15:24,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:15:23" (1/3) ... [2021-10-16 03:15:24,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615bd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:15:24, skipping insertion in model container [2021-10-16 03:15:24,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:15:23" (2/3) ... [2021-10-16 03:15:24,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615bd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:15:24, skipping insertion in model container [2021-10-16 03:15:24,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:15:24" (3/3) ... [2021-10-16 03:15:24,050 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2021-10-16 03:15:24,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:15:24,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-16 03:15:24,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:15:24,108 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 03:15:24,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 03:15:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 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 03:15:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:15:24,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:24,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:15:24,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-16 03:15:24,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:24,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750328419] [2021-10-16 03:15:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:24,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:24,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:24,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:15:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:24,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:24,377 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 03:15:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:24,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:24,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:24,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750328419] [2021-10-16 03:15:24,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750328419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:15:24,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:15:24,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:15:24,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134836222] [2021-10-16 03:15:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:15:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:15:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:24,455 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 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) 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 03:15:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:24,506 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-16 03:15:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:15:24,508 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 03:15:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:24,517 INFO L225 Difference]: With dead ends: 19 [2021-10-16 03:15:24,517 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 03:15:24,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:15:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 03:15:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 03:15:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 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 03:15:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-16 03:15:24,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-10-16 03:15:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-16 03:15:24,551 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 03:15:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-16 03:15:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:15:24,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:24,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:15:24,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:24,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:15:24,765 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-16 03:15:24,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:24,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594693581] [2021-10-16 03:15:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:24,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:24,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:24,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:15:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:15:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:24,885 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 03:15:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:24,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:25,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:25,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594693581] [2021-10-16 03:15:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594693581] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:15:25,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:15:25,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 03:15:25,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958460107] [2021-10-16 03:15:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:15:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:15:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:15:25,153 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 03:15:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:25,361 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-16 03:15:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:15:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 4 [2021-10-16 03:15:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:25,364 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:15:25,364 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 03:15:25,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:15:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 03:15:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-10-16 03:15:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) 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 03:15:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-16 03:15:25,368 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2021-10-16 03:15:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:25,369 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-16 03:15:25,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 03:15:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-16 03:15:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:15:25,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:25,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:15:25,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:25,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:15:25,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2021-10-16 03:15:25,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:25,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216447683] [2021-10-16 03:15:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:25,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:25,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:25,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:25,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:15:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:25,760 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 03:15:25,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:25,829 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 03:15:25,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216447683] [2021-10-16 03:15:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216447683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:25,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [181375229] [2021-10-16 03:15:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:25,831 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:25,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:25,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 03:15:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:26,024 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 03:15:26,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:26,078 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 03:15:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [181375229] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:26,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662693540] [2021-10-16 03:15:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:26,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:26,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:26,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 03:15:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:15:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:26,193 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 03:15:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:15:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:15:26,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662693540] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:15:26,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 03:15:26,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4, 4, 4, 4] total 12 [2021-10-16 03:15:26,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373769565] [2021-10-16 03:15:26,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:15:26,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:15:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:15:26,849 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:27,258 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-16 03:15:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:15:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 03:15:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:27,260 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:15:27,260 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 03:15:27,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-16 03:15:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 03:15:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-16 03:15:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-16 03:15:27,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-16 03:15:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:27,267 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-16 03:15:27,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-16 03:15:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:15:27,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:27,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:15:27,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:27,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:27,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:27,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 741359649, now seen corresponding path program 1 times [2021-10-16 03:15:27,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:27,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345217704] [2021-10-16 03:15:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:27,886 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:27,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:27,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:15:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:27,995 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 03:15:27,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:28,058 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 03:15:28,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:28,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345217704] [2021-10-16 03:15:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345217704] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:28,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [535901444] [2021-10-16 03:15:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:28,061 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:28,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:28,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:28,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 03:15:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:28,247 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 03:15:28,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:28,286 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 03:15:28,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [535901444] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:28,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879069993] [2021-10-16 03:15:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:28,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:28,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:28,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 03:15:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:15:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:28,430 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 03:15:28,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:28,465 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 03:15:28,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879069993] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:28,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:15:28,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-16 03:15:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303067872] [2021-10-16 03:15:28,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:15:28,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:15:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:15:28,483 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 03:15:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:28,562 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-16 03:15:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:15:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 03:15:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:28,563 INFO L225 Difference]: With dead ends: 34 [2021-10-16 03:15:28,563 INFO L226 Difference]: Without dead ends: 34 [2021-10-16 03:15:28,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:15:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-16 03:15:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-10-16 03:15:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) 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 03:15:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-16 03:15:28,570 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2021-10-16 03:15:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:28,570 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-16 03:15:28,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 03:15:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-16 03:15:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:15:28,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:28,572 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-10-16 03:15:28,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:28,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:29,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:29,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:29,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2021-10-16 03:15:29,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:29,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909212977] [2021-10-16 03:15:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:29,190 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:29,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:29,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:15:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:15:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:29,284 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 03:15:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:29,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:30,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909212977] [2021-10-16 03:15:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909212977] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743451344] [2021-10-16 03:15:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:30,059 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:30,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:30,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 03:15:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:30,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:15:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:30,233 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 03:15:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:30,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743451344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:30,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259694718] [2021-10-16 03:15:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:30,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:30,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:30,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 03:15:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:30,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:15:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:30,731 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 03:15:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:30,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:31,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259694718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:31,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:15:31,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-16 03:15:31,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262107762] [2021-10-16 03:15:31,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:15:31,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:15:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:15:31,077 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:31,936 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-10-16 03:15:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:15:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 03:15:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:31,939 INFO L225 Difference]: With dead ends: 74 [2021-10-16 03:15:31,939 INFO L226 Difference]: Without dead ends: 74 [2021-10-16 03:15:31,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 872.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:15:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-16 03:15:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 40. [2021-10-16 03:15:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-16 03:15:31,946 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 10 [2021-10-16 03:15:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-16 03:15:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-16 03:15:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:15:31,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:31,948 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:15:31,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:32,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:32,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:32,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:32,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 2 times [2021-10-16 03:15:32,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:32,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88831378] [2021-10-16 03:15:32,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:32,553 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:32,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:32,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 03:15:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:15:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:32,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:32,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:32,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88831378] [2021-10-16 03:15:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88831378] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:32,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549105096] [2021-10-16 03:15:32,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:32,899 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:32,904 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:32,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 03:15:33,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:33,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:15:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:33,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:33,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549105096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:33,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027040073] [2021-10-16 03:15:33,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:33,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:33,288 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:33,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 03:15:33,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:33,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:15:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:33,465 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 03:15:33,608 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 15 treesize of output 11 [2021-10-16 03:15:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:33,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:34,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027040073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:34,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:15:34,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 9] total 20 [2021-10-16 03:15:34,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694595231] [2021-10-16 03:15:34,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 03:15:34,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:34,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 03:15:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:15:34,210 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:34,858 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-10-16 03:15:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:15:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 03:15:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:34,861 INFO L225 Difference]: With dead ends: 54 [2021-10-16 03:15:34,861 INFO L226 Difference]: Without dead ends: 54 [2021-10-16 03:15:34,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:15:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-16 03:15:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-10-16 03:15:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-10-16 03:15:34,868 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 19 [2021-10-16 03:15:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:34,868 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-10-16 03:15:34,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-10-16 03:15:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:15:34,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:34,869 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2021-10-16 03:15:34,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:35,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:35,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-16 03:15:35,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:15:35,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2021-10-16 03:15:35,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:35,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289000107] [2021-10-16 03:15:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:35,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:35,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:35,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 03:15:35,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:15:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:35,649 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 03:15:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:35,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:38,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:38,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289000107] [2021-10-16 03:15:38,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289000107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:38,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [683121025] [2021-10-16 03:15:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:38,207 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:38,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:38,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 03:15:38,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:15:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:38,520 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 03:15:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:38,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:40,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [683121025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:40,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377344625] [2021-10-16 03:15:40,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:15:40,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:40,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:40,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 03:15:41,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:15:41,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:15:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:15:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:41,282 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 03:15:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:41,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377344625] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:44,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:15:44,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 9] total 27 [2021-10-16 03:15:44,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449059005] [2021-10-16 03:15:44,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-16 03:15:44,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-16 03:15:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:15:44,100 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:55,910 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2021-10-16 03:15:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:15:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 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 03:15:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:55,913 INFO L225 Difference]: With dead ends: 132 [2021-10-16 03:15:55,913 INFO L226 Difference]: Without dead ends: 132 [2021-10-16 03:15:55,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 13685.7ms TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 03:15:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-16 03:15:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 64. [2021-10-16 03:15:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-10-16 03:15:55,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 22 [2021-10-16 03:15:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:55,921 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-10-16 03:15:55,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-10-16 03:15:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 03:15:55,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:55,923 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:15:55,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:56,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:56,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-16 03:15:56,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:56,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-16 03:15:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 3 times [2021-10-16 03:15:56,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:56,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829312309] [2021-10-16 03:15:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:15:56,527 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:56,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 03:15:56,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 03:15:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 03:15:56,870 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:15:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:15:56,949 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:15:56,950 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:15:56,950 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 03:15:56,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 03:15:56,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 03:15:56,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 03:15:56,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:15:56,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:57,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:15:57,159 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:15:57,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:15:57 BoogieIcfgContainer [2021-10-16 03:15:57,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:15:57,199 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:15:57,199 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:15:57,199 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:15:57,200 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:15:24" (3/4) ... [2021-10-16 03:15:57,201 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:15:57,242 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:15:57,243 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:15:57,244 INFO L168 Benchmark]: Toolchain (without parser) took 33992.09 ms. Allocated memory was 48.2 MB in the beginning and 75.5 MB in the end (delta: 27.3 MB). Free memory was 23.4 MB in the beginning and 34.5 MB in the end (delta: -11.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,245 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 48.2 MB. Free memory was 29.2 MB in the beginning and 29.1 MB in the end (delta: 32.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:57,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.32 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.2 MB in the beginning and 47.4 MB in the end (delta: -24.2 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,246 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 45.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,246 INFO L168 Benchmark]: Boogie Preprocessor took 50.86 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:57,246 INFO L168 Benchmark]: RCFGBuilder took 343.53 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 34.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,247 INFO L168 Benchmark]: TraceAbstraction took 33155.89 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 33.9 MB in the beginning and 37.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,248 INFO L168 Benchmark]: Witness Printer took 44.03 ms. Allocated memory is still 75.5 MB. Free memory was 37.9 MB in the beginning and 34.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:57,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 48.2 MB. Free memory was 29.2 MB in the beginning and 29.1 MB in the end (delta: 32.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.32 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.2 MB in the beginning and 47.4 MB in the end (delta: -24.2 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 45.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.86 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 343.53 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 34.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33155.89 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 33.9 MB in the beginning and 37.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 44.03 ms. Allocated memory is still 75.5 MB. Free memory was 37.9 MB in the beginning and 34.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 22]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] int *array = alloca(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND FALSE !(i < 10) [L14] return array; [L19] int *numbers = getNumbers(); [L21] int i = 0; [L21] COND TRUE i < 10 [L22] numbers + i - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 22]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 33058.7ms, OverallIterations: 8, TraceHistogramMax: 10, EmptinessCheckTime: 34.0ms, AutomataDifference: 14125.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 99 SDtfs, 464 SDslu, 448 SDs, 0 SdLazy, 711 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3805.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 427 GetRequests, 338 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 15956.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=7, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.7ms AutomataMinimizationTime, 7 MinimizatonAttempts, 122 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 172.9ms SsaConstructionTime, 575.0ms SatisfiabilityAnalysisTime, 12197.1ms InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 4405 SizeOfPredicates, 34 NumberOfNonLiveVariables, 816 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 2/528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 03:15:57,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c13bd3-aa9b-47e3-9b2d-3932a658a194/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...