./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7 --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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:50:06,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:50:06,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:50:06,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:50:06,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:50:06,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:50:06,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:50:06,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:50:06,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:50:06,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:50:06,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:50:06,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:50:06,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:50:06,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:50:06,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:50:06,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:50:06,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:50:06,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:50:06,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:50:06,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:50:06,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:50:06,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:50:06,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:50:06,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:50:06,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:50:06,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:50:06,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:50:06,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:50:06,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:50:06,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:50:06,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:50:06,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:50:06,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:50:06,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:50:06,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:50:06,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:50:06,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:50:06,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:50:06,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:50:06,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:50:06,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:50:06,389 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:50:06,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:50:06,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:50:06,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:50:06,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:50:06,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:50:06,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:50:06,445 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:50:06,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:50:06,445 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:50:06,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:50:06,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:50:06,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:50:06,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:50:06,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:50:06,448 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:50:06,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:50:06,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:50:06,449 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:50:06,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:50:06,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:50:06,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:50:06,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:50:06,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:50:06,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:50:06,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:50:06,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:50:06,454 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:50:06,454 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:50:06,454 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:50:06,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:50:06,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:50:06,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:50:06,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:50:06,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:50:06,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:50:06,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:50:06,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:50:06,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:50:06,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:50:06,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:50:06,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:50:06,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:50:06,458 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_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2021-11-25 18:50:06,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:50:06,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:50:06,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:50:06,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:50:06,798 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:50:06,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/verifythis/duplets.c [2021-11-25 18:50:06,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/data/4d297df21/e23f924728464bf297c1e14d0a4b0350/FLAGa2dddd51e [2021-11-25 18:50:07,351 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:50:07,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/sv-benchmarks/c/verifythis/duplets.c [2021-11-25 18:50:07,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/data/4d297df21/e23f924728464bf297c1e14d0a4b0350/FLAGa2dddd51e [2021-11-25 18:50:07,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/data/4d297df21/e23f924728464bf297c1e14d0a4b0350 [2021-11-25 18:50:07,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:50:07,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:50:07,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:50:07,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:50:07,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:50:07,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:50:07" (1/1) ... [2021-11-25 18:50:07,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f5d92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:07, skipping insertion in model container [2021-11-25 18:50:07,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:50:07" (1/1) ... [2021-11-25 18:50:07,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:50:07,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:50:07,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-11-25 18:50:07,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:50:08,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:50:08,024 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-11-25 18:50:08,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:50:08,049 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:50:08,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08 WrapperNode [2021-11-25 18:50:08,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:50:08,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:50:08,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:50:08,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:50:08,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,091 INFO L137 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2021-11-25 18:50:08,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:50:08,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:50:08,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:50:08,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:50:08,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:50:08,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:50:08,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:50:08,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:50:08,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (1/1) ... [2021-11-25 18:50:08,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:50:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:08,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:50:08,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:50:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:50:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:50:08,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:50:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:50:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:50:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:50:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:50:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:50:08,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:50:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:50:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:50:08,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:50:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:50:08,351 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:50:08,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:50:08,815 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:50:08,864 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:50:08,864 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:50:08,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:50:08 BoogieIcfgContainer [2021-11-25 18:50:08,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:50:08,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:50:08,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:50:08,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:50:08,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:50:07" (1/3) ... [2021-11-25 18:50:08,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a7cd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:50:08, skipping insertion in model container [2021-11-25 18:50:08,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:50:08" (2/3) ... [2021-11-25 18:50:08,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a7cd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:50:08, skipping insertion in model container [2021-11-25 18:50:08,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:50:08" (3/3) ... [2021-11-25 18:50:08,876 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-11-25 18:50:08,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:50:08,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2021-11-25 18:50:08,925 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:50:08,933 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 [2021-11-25 18:50:08,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-11-25 18:50:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:50:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:50:08,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:08,960 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:08,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 18:50:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2021-11-25 18:50:08,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:08,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537215848] [2021-11-25 18:50:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:09,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:50:09,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:09,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537215848] [2021-11-25 18:50:09,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537215848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:09,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:09,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:50:09,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798647841] [2021-11-25 18:50:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:09,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:50:09,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:50:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:50:09,286 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:09,394 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-11-25 18:50:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:50:09,397 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), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2021-11-25 18:50:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:09,405 INFO L225 Difference]: With dead ends: 85 [2021-11-25 18:50:09,405 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 18:50:09,407 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 [2021-11-25 18:50:09,411 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:09,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:50:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 18:50:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-25 18:50:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:50:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-11-25 18:50:09,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2021-11-25 18:50:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:09,459 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-11-25 18:50:09,460 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), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-11-25 18:50:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:50:09,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:09,461 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:09,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:50:09,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 18:50:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2021-11-25 18:50:09,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103933664] [2021-11-25 18:50:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:09,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:50:09,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103933664] [2021-11-25 18:50:09,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103933664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334380663] [2021-11-25 18:50:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:09,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:09,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:09,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:50:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:50:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:09,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:50:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:50:10,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:50:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:50:11,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334380663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:50:11,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739251188] [2021-11-25 18:50:11,451 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:50:11,451 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:50:11,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:50:11,460 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:50:11,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:50:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-25 18:50:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 18:50:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,703 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:11,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:11,833 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:11,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,036 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:12,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,220 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:12,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,615 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:12,798 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:12,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:13,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,066 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:13,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,189 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:13,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:13,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:13,309 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:50:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2021-11-25 18:50:13,358 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 18:50:13,378 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:50:15,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1739251188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:15,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:50:15,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 5, 4] total 16 [2021-11-25 18:50:15,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574764727] [2021-11-25 18:50:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:15,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:50:15,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:50:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:50:15,297 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:50:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:15,829 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-11-25 18:50:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:50:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2021-11-25 18:50:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:15,832 INFO L225 Difference]: With dead ends: 83 [2021-11-25 18:50:15,832 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 18:50:15,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:50:15,834 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 85 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:15,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 190 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:50:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 18:50:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-25 18:50:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:50:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-25 18:50:15,847 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2021-11-25 18:50:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:15,848 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-25 18:50:15,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:50:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-25 18:50:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:50:15,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:15,849 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:16,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:16,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 18:50:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2021-11-25 18:50:16,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:16,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356544417] [2021-11-25 18:50:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:16,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:50:16,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:16,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356544417] [2021-11-25 18:50:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356544417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:16,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741343541] [2021-11-25 18:50:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:16,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:16,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0440d2cd-49fe-438b-8f01-abce2ee9fbc7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:50:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:16,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:50:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:16,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:50:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:50:16,522 INFO L328 TraceCheckSpWp]: Computing backward predicates...