./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V --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 b78007c6b6ea6b815e47bde6b36f25c26c431b61fea97b83eeeefa52c8c4206a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:40:42,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:40:42,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:40:42,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:40:42,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:40:42,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:40:42,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:40:42,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:40:42,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:40:42,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:40:42,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:40:42,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:40:42,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:40:42,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:40:42,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:40:42,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:40:42,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:40:42,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:40:42,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:40:42,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:40:42,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:40:42,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:40:42,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:40:42,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:40:42,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:40:42,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:40:42,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:40:42,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:40:42,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:40:42,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:40:42,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:40:42,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:40:42,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:40:42,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:40:42,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:40:42,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:40:42,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:40:42,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:40:42,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:40:42,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:40:42,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:40:42,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:40:42,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:40:42,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:40:42,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:40:42,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:40:42,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:40:42,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:40:42,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:40:42,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:40:42,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:40:42,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:40:42,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:40:42,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:40:42,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:40:42,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:40:42,542 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:40:42,542 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:40:42,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:40:42,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:40:42,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:40:42,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:40:42,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:40:42,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:40:42,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:40:42,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:40:42,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:40:42,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:40:42,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:40:42,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:40:42,563 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:40:42,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:40:42,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:40:42,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:40:42,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:40:42,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:40:42,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:40:42,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:40:42,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:40:42,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:40:42,566 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:40:42,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:40:42,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:40:42,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:40:42,566 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_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78007c6b6ea6b815e47bde6b36f25c26c431b61fea97b83eeeefa52c8c4206a [2021-11-23 03:40:42,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:40:42,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:40:42,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:40:42,845 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:40:42,845 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:40:42,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-11-23 03:40:42,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/data/69606e1cf/7766425fde4b4a49a92fa71240808dcf/FLAG8274a8fc5 [2021-11-23 03:40:43,571 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:40:43,571 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-11-23 03:40:43,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/data/69606e1cf/7766425fde4b4a49a92fa71240808dcf/FLAG8274a8fc5 [2021-11-23 03:40:43,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/data/69606e1cf/7766425fde4b4a49a92fa71240808dcf [2021-11-23 03:40:43,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:40:43,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:40:43,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:40:43,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:40:43,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:40:43,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:43" (1/1) ... [2021-11-23 03:40:43,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957fc9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:43, skipping insertion in model container [2021-11-23 03:40:43,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:43" (1/1) ... [2021-11-23 03:40:43,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:40:43,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:40:44,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:40:44,185 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:40:44,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:40:44,256 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:40:44,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44 WrapperNode [2021-11-23 03:40:44,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:40:44,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:40:44,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:40:44,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:40:44,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,300 INFO L137 Inliner]: procedures = 122, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-11-23 03:40:44,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:40:44,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:40:44,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:40:44,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:40:44,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:40:44,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:40:44,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:40:44,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:40:44,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (1/1) ... [2021-11-23 03:40:44,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:40:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:44,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:40:44,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:40:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:40:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:40:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:40:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:40:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:40:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:40:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:40:44,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:40:44,541 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:40:44,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:40:44,727 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:40:44,786 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:40:44,787 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:40:44,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:44 BoogieIcfgContainer [2021-11-23 03:40:44,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:40:44,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:40:44,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:40:44,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:40:44,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:40:43" (1/3) ... [2021-11-23 03:40:44,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9669da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:44, skipping insertion in model container [2021-11-23 03:40:44,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:44" (2/3) ... [2021-11-23 03:40:44,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9669da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:44, skipping insertion in model container [2021-11-23 03:40:44,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:44" (3/3) ... [2021-11-23 03:40:44,819 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2021-11-23 03:40:44,824 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:40:44,824 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-23 03:40:44,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:40:44,877 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, mAutomataTypeConcurrency=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 [2021-11-23 03:40:44,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-23 03:40:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 25 states have (on average 2.04) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:40:44,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:44,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:40:44,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash 3797425, now seen corresponding path program 1 times [2021-11-23 03:40:44,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654780336] [2021-11-23 03:40:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:44,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:45,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654780336] [2021-11-23 03:40:45,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654780336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:45,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:45,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:45,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213126807] [2021-11-23 03:40:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:45,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:40:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:40:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:40:45,094 INFO L87 Difference]: Start difference. First operand has 47 states, 25 states have (on average 2.04) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-11-23 03:40:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:45,145 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-23 03:40:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:40:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2021-11-23 03:40:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:45,157 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:40:45,158 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:40:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:40:45,164 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:45,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:40:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 03:40:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.96) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-23 03:40:45,205 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 4 [2021-11-23 03:40:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:45,206 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-23 03:40:45,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-11-23 03:40:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-23 03:40:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:40:45,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:45,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:40:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:40:45,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash 117505828, now seen corresponding path program 1 times [2021-11-23 03:40:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109426927] [2021-11-23 03:40:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:45,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:45,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109426927] [2021-11-23 03:40:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109426927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:45,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:45,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:45,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55535925] [2021-11-23 03:40:45,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:45,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:45,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:45,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:45,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:45,327 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:45,388 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-23 03:40:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-23 03:40:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:45,390 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:40:45,390 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:40:45,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:45,397 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:45,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:40:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 03:40:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.92) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-11-23 03:40:45,417 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 5 [2021-11-23 03:40:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:45,418 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-11-23 03:40:45,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-11-23 03:40:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:40:45,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:45,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:40:45,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:40:45,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 117505829, now seen corresponding path program 1 times [2021-11-23 03:40:45,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:45,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927588040] [2021-11-23 03:40:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:45,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:45,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927588040] [2021-11-23 03:40:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927588040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:45,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:45,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:45,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770824744] [2021-11-23 03:40:45,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:45,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:40:45,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:40:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:45,551 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:45,641 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-11-23 03:40:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:40:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-23 03:40:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:45,646 INFO L225 Difference]: With dead ends: 88 [2021-11-23 03:40:45,646 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:40:45,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:40:45,651 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:45,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 106 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:40:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2021-11-23 03:40:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 48 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) [2021-11-23 03:40:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-11-23 03:40:45,663 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 5 [2021-11-23 03:40:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:45,663 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-11-23 03:40:45,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-11-23 03:40:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:40:45,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:45,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:45,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:40:45,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1254025907, now seen corresponding path program 1 times [2021-11-23 03:40:45,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:45,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84530420] [2021-11-23 03:40:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:45,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:45,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84530420] [2021-11-23 03:40:45,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84530420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:45,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:45,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:45,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667820740] [2021-11-23 03:40:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:45,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:40:45,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:40:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:45,752 INFO L87 Difference]: Start difference. First operand 49 states and 53 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) [2021-11-23 03:40:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:45,811 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-23 03:40:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:45,812 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 7 [2021-11-23 03:40:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:45,813 INFO L225 Difference]: With dead ends: 46 [2021-11-23 03:40:45,813 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:40:45,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:45,820 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:45,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:40:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 03:40:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-23 03:40:45,833 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 7 [2021-11-23 03:40:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:45,834 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-23 03:40:45,834 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) [2021-11-23 03:40:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-23 03:40:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:40:45,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:45,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:45,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:40:45,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1254025908, now seen corresponding path program 1 times [2021-11-23 03:40:45,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:45,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426020272] [2021-11-23 03:40:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:45,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:46,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426020272] [2021-11-23 03:40:46,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426020272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:46,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:46,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:40:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818441210] [2021-11-23 03:40:46,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:46,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:46,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:46,029 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-11-23 03:40:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:46,114 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-11-23 03:40:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:46,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:40:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:46,116 INFO L225 Difference]: With dead ends: 79 [2021-11-23 03:40:46,116 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 03:40:46,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:46,117 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:46,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 03:40:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2021-11-23 03:40:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-23 03:40:46,134 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-11-23 03:40:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:46,141 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-23 03:40:46,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-11-23 03:40:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-23 03:40:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:40:46,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:46,142 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-23 03:40:46,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:40:46,143 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1255522762, now seen corresponding path program 1 times [2021-11-23 03:40:46,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030451801] [2021-11-23 03:40:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:46,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:46,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030451801] [2021-11-23 03:40:46,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030451801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973926102] [2021-11-23 03:40:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:46,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:46,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:46,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:40:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:40:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:46,415 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:40:46,416 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-23 03:40:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:46,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:46,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973926102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:46,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:40:46,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 03:40:46,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215949381] [2021-11-23 03:40:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:46,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:40:46,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:40:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:40:46,458 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2021-11-23 03:40:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:46,554 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-11-23 03:40:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 7 [2021-11-23 03:40:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:46,559 INFO L225 Difference]: With dead ends: 78 [2021-11-23 03:40:46,559 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 03:40:46,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:46,563 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:46,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 146 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 03:40:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-11-23 03:40:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-23 03:40:46,575 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2021-11-23 03:40:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:46,576 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-23 03:40:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2021-11-23 03:40:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-23 03:40:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:40:46,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:46,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:46,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:46,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:40:46,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1766851146, now seen corresponding path program 1 times [2021-11-23 03:40:46,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:46,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295977929] [2021-11-23 03:40:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:46,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:46,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:46,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295977929] [2021-11-23 03:40:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295977929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:46,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021314680] [2021-11-23 03:40:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:46,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:46,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:46,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:40:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:40:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:46,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:46,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021314680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:46,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:40:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-23 03:40:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991477276] [2021-11-23 03:40:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:46,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:40:46,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:40:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:46,973 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:47,006 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-23 03:40:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:40:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:47,026 INFO L225 Difference]: With dead ends: 76 [2021-11-23 03:40:47,026 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 03:40:47,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:47,027 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:47,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 03:40:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2021-11-23 03:40:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-23 03:40:47,033 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 9 [2021-11-23 03:40:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-23 03:40:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-23 03:40:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:40:47,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:47,034 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:47,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:47,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:47,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -328361959, now seen corresponding path program 1 times [2021-11-23 03:40:47,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:47,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418352455] [2021-11-23 03:40:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:47,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:47,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418352455] [2021-11-23 03:40:47,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418352455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:47,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565347540] [2021-11-23 03:40:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:47,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:47,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:40:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:40:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:47,507 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:40:47,507 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-23 03:40:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:47,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:47,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565347540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:47,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:40:47,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-23 03:40:47,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391909020] [2021-11-23 03:40:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:47,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:47,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:40:47,615 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:47,787 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-11-23 03:40:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:40:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:47,789 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:40:47,789 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 03:40:47,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:40:47,791 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 116 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:47,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 131 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 03:40:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2021-11-23 03:40:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.5) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-23 03:40:47,796 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2021-11-23 03:40:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:47,797 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-23 03:40:47,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-23 03:40:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:40:47,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:47,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:47,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:48,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1062261639, now seen corresponding path program 1 times [2021-11-23 03:40:48,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132808715] [2021-11-23 03:40:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:48,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:48,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:48,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132808715] [2021-11-23 03:40:48,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132808715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:48,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:48,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:48,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105114521] [2021-11-23 03:40:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:48,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:40:48,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:40:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:48,048 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:48,086 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-23 03:40:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:40:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:40:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:48,087 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:40:48,087 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 03:40:48,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:40:48,088 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:48,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 03:40:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-23 03:40:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-23 03:40:48,092 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 10 [2021-11-23 03:40:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:48,092 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-23 03:40:48,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-23 03:40:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:40:48,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:48,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:48,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:40:48,094 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:48,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1062261640, now seen corresponding path program 1 times [2021-11-23 03:40:48,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:48,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769257796] [2021-11-23 03:40:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:48,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:48,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769257796] [2021-11-23 03:40:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769257796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:48,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:48,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:40:48,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769844735] [2021-11-23 03:40:48,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:48,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:48,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:48,187 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:48,264 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-23 03:40:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:40:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:48,268 INFO L225 Difference]: With dead ends: 51 [2021-11-23 03:40:48,268 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 03:40:48,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:48,269 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:48,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 55 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 03:40:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-11-23 03:40:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 03:40:48,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2021-11-23 03:40:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 03:40:48,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 03:40:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:40:48,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:48,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:48,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:40:48,274 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168549, now seen corresponding path program 1 times [2021-11-23 03:40:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869440102] [2021-11-23 03:40:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:48,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:48,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:48,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869440102] [2021-11-23 03:40:48,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869440102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:48,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90476851] [2021-11-23 03:40:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:48,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:48,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:48,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:40:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:40:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:48,515 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:40:48,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-23 03:40:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90476851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471809176] [2021-11-23 03:40:48,793 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:40:48,793 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:48,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:48,804 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:48,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:49,114 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 03:40:49,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-23 03:40:49,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-11-23 03:40:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:40:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:40:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:49,328 INFO L354 Elim1Store]: treesize reduction 68, result has 25.3 percent of original size [2021-11-23 03:40:49,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 180 [2021-11-23 03:40:49,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:40:49,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:40:49,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:50,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1377#(and (<= 4 ~b~0.offset) (< (select |#length| ~a~0.base) (+ ~a~0.offset (* 4 |ULTIMATE.start_foo_~i~0#1|) 4)) (<= ~b~0.offset 4) (= ~a~0.offset 0) (= |#NULL.offset| 0) (<= 1 ~n~0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:50,030 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:50,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:50,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2021-11-23 03:40:50,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793670025] [2021-11-23 03:40:50,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:50,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:40:50,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:40:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:40:50,032 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:50,359 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-23 03:40:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:40:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:40:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:50,360 INFO L225 Difference]: With dead ends: 73 [2021-11-23 03:40:50,360 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:40:50,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:40:50,361 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:50,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 70 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:40:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:40:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-11-23 03:40:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 03:40:50,364 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 11 [2021-11-23 03:40:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:50,364 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 03:40:50,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 03:40:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:40:50,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:50,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:50,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:50,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:40:50,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash 517494277, now seen corresponding path program 1 times [2021-11-23 03:40:50,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:50,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128338593] [2021-11-23 03:40:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:50,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:50,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:50,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128338593] [2021-11-23 03:40:50,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128338593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:50,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:50,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:50,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646749532] [2021-11-23 03:40:50,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:50,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:50,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:50,624 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2021-11-23 03:40:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:50,638 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-23 03:40:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:50,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) Word has length 13 [2021-11-23 03:40:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:50,639 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:40:50,640 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 03:40:50,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:50,641 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:50,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 03:40:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 03:40:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 03:40:50,647 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2021-11-23 03:40:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:50,647 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 03:40:50,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2021-11-23 03:40:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 03:40:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:40:50,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:50,650 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:50,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:40:50,650 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1355270941, now seen corresponding path program 2 times [2021-11-23 03:40:50,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747200363] [2021-11-23 03:40:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:50,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:50,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:50,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747200363] [2021-11-23 03:40:50,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747200363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:50,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811630439] [2021-11-23 03:40:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:40:50,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:50,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:50,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:40:50,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:40:50,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:40:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:40:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:50,820 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:40:50,821 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-11-23 03:40:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:40:50,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:40:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811630439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:51,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150908319] [2021-11-23 03:40:51,120 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:40:51,120 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:51,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:51,121 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:51,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:51,302 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 03:40:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-23 03:40:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-11-23 03:40:51,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:40:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-23 03:40:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:51,449 INFO L354 Elim1Store]: treesize reduction 60, result has 13.0 percent of original size [2021-11-23 03:40:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 179 [2021-11-23 03:40:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:40:51,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:40:51,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:52,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1666#(and (<= 0 |#NULL.base|) (<= 4 ~b~0.offset) (<= |#NULL.offset| 0) (< (select |#length| ~a~0.base) (+ ~a~0.offset (* 4 |ULTIMATE.start_foo_~i~0#1|) 4)) (<= ~b~0.offset 4) (<= ~a~0.offset 0) (<= 0 ~a~0.offset) (<= |#NULL.base| 0) (<= 1 ~n~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2021-11-23 03:40:52,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:52,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:52,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 13 [2021-11-23 03:40:52,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311123685] [2021-11-23 03:40:52,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:52,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:40:52,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:40:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:40:52,129 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:52,621 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-11-23 03:40:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:40:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:40:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:52,623 INFO L225 Difference]: With dead ends: 74 [2021-11-23 03:40:52,623 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 03:40:52,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:40:52,625 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 186 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 40 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:40:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 03:40:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-11-23 03:40:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 47 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) [2021-11-23 03:40:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-23 03:40:52,629 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 13 [2021-11-23 03:40:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:52,629 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-23 03:40:52,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-23 03:40:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:40:52,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:52,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:52,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:52,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:40:52,844 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:52,845 INFO L85 PathProgramCache]: Analyzing trace with hash -936203154, now seen corresponding path program 1 times [2021-11-23 03:40:52,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:52,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686827130] [2021-11-23 03:40:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:52,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:40:52,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686827130] [2021-11-23 03:40:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686827130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066048047] [2021-11-23 03:40:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:52,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:52,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:52,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:40:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:53,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:40:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:53,071 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:40:53,071 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-23 03:40:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:40:53,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:53,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066048047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:53,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:40:53,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-23 03:40:53,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264614714] [2021-11-23 03:40:53,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:53,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:53,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:40:53,189 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:53,273 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-23 03:40:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:40:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:53,274 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:40:53,275 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 03:40:53,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:40:53,276 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:53,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 61 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 03:40:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-11-23 03:40:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-23 03:40:53,293 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 14 [2021-11-23 03:40:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-23 03:40:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-23 03:40:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:40:53,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:53,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:53,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:40:53,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:53,505 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash -904202617, now seen corresponding path program 1 times [2021-11-23 03:40:53,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:53,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996585450] [2021-11-23 03:40:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:53,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:40:53,515 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:40:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:40:53,560 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:40:53,561 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:40:53,562 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (20 of 21 remaining) [2021-11-23 03:40:53,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (19 of 21 remaining) [2021-11-23 03:40:53,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (18 of 21 remaining) [2021-11-23 03:40:53,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (17 of 21 remaining) [2021-11-23 03:40:53,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (16 of 21 remaining) [2021-11-23 03:40:53,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (15 of 21 remaining) [2021-11-23 03:40:53,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (14 of 21 remaining) [2021-11-23 03:40:53,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (13 of 21 remaining) [2021-11-23 03:40:53,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (12 of 21 remaining) [2021-11-23 03:40:53,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2021-11-23 03:40:53,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2021-11-23 03:40:53,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2021-11-23 03:40:53,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2021-11-23 03:40:53,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2021-11-23 03:40:53,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2021-11-23 03:40:53,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2021-11-23 03:40:53,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2021-11-23 03:40:53,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2021-11-23 03:40:53,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2021-11-23 03:40:53,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (1 of 21 remaining) [2021-11-23 03:40:53,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2021-11-23 03:40:53,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:40:53,573 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:53,577 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:40:53,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:40:53 BoogieIcfgContainer [2021-11-23 03:40:53,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:40:53,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:40:53,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:40:53,604 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:40:53,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:44" (3/4) ... [2021-11-23 03:40:53,606 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:40:53,643 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:40:53,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:40:53,644 INFO L158 Benchmark]: Toolchain (without parser) took 9819.88ms. Allocated memory was 79.7MB in the beginning and 176.2MB in the end (delta: 96.5MB). Free memory was 57.9MB in the beginning and 141.3MB in the end (delta: -83.4MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-11-23 03:40:53,644 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 79.7MB. Free memory is still 54.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:40:53,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.58ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 57.8MB in the beginning and 88.3MB in the end (delta: -30.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-11-23 03:40:53,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.74ms. Allocated memory is still 121.6MB. Free memory was 88.3MB in the beginning and 86.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:40:53,646 INFO L158 Benchmark]: Boogie Preprocessor took 26.85ms. Allocated memory is still 121.6MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:40:53,646 INFO L158 Benchmark]: RCFGBuilder took 460.74ms. Allocated memory is still 121.6MB. Free memory was 84.9MB in the beginning and 71.7MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:40:53,647 INFO L158 Benchmark]: TraceAbstraction took 8811.69ms. Allocated memory was 121.6MB in the beginning and 176.2MB in the end (delta: 54.5MB). Free memory was 71.2MB in the beginning and 143.4MB in the end (delta: -72.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:40:53,647 INFO L158 Benchmark]: Witness Printer took 40.30ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 141.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:40:53,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 79.7MB. Free memory is still 54.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.58ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 57.8MB in the beginning and 88.3MB in the end (delta: -30.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.74ms. Allocated memory is still 121.6MB. Free memory was 88.3MB in the beginning and 86.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.85ms. Allocated memory is still 121.6MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 460.74ms. Allocated memory is still 121.6MB. Free memory was 84.9MB in the beginning and 71.7MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8811.69ms. Allocated memory was 121.6MB in the beginning and 176.2MB in the end (delta: 54.5MB). Free memory was 71.2MB in the beginning and 143.4MB in the end (delta: -72.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 40.30ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 141.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L542] *b++ = 0 [L543] CALL foo() [L528] int i; [L529] i = 0 VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 [L529] i++ VAL [a={-3:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) [L531] i = 0 VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) [L543] RET foo() [L544] b[-1] VAL [a={-3:0}, b={-2:4}, b[-1]=0, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [a={-3:0}, b={-2:4}, n=1] [L547] free(a) VAL [a={-3:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [a={-3:0}, b={-2:4}, n=1] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: 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, 47 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 922 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 922 mSDsluCounter, 1017 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 623 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 924 IncrementalHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 420 mSDtfsCounter, 924 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 225 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 202 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 1543 SizeOfPredicates, 18 NumberOfNonLiveVariables, 437 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 37/63 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! [2021-11-23 03:40:53,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4089bba0-3853-43e1-ad95-392bf2e11724/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)