./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.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_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/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_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/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_5bbb83a9-b12d-4497-8881-c86294ca89fa/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 db4b4fb03b1dcc2b831885b6cb4b7f01d511832c58de7e20715e49b64db06c6b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:43,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:43,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:43,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:43,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:43,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:43,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:43,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:43,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:43,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:43,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:43,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:43,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:43,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:43,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:43,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:43,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:43,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:43,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:43,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:43,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:43,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:43,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:43,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:43,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:43,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:43,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:43,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:43,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:43,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:43,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:43,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:43,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:43,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:43,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:43,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:43,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:43,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:43,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:43,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:43,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:43,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:21:43,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:43,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:43,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:43,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:43,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:43,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:43,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:43,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:43,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:43,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:43,458 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:43,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:43,459 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:43,459 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:43,459 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:43,459 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:43,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:43,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:43,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:21:43,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:21:43,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:43,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:21:43,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:21:43,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:43,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:21:43,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:43,464 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:21:43,464 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:21:43,465 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:21:43,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:43,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:21:43,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:21:43,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:43,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:43,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:43,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:43,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:43,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:43,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:43,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:43,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:43,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:43,468 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_5bbb83a9-b12d-4497-8881-c86294ca89fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db4b4fb03b1dcc2b831885b6cb4b7f01d511832c58de7e20715e49b64db06c6b [2021-11-25 20:21:43,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:43,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:43,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:43,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:43,835 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:43,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2021-11-25 20:21:43,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/data/c0c163640/b9da2b281bb442cabb60abec12fdaa13/FLAGb9bee7731 [2021-11-25 20:21:44,418 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:44,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2021-11-25 20:21:44,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/data/c0c163640/b9da2b281bb442cabb60abec12fdaa13/FLAGb9bee7731 [2021-11-25 20:21:44,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/data/c0c163640/b9da2b281bb442cabb60abec12fdaa13 [2021-11-25 20:21:44,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:44,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:44,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:44,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:44,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:44,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:44" (1/1) ... [2021-11-25 20:21:44,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d27fe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:44, skipping insertion in model container [2021-11-25 20:21:44,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:44" (1/1) ... [2021-11-25 20:21:44,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:44,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:45,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:45,090 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:45,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:45,138 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:45,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45 WrapperNode [2021-11-25 20:21:45,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:45,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:45,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:45,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:45,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,186 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-11-25 20:21:45,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:45,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:45,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:45,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:45,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:45,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:45,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:45,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:45,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (1/1) ... [2021-11-25 20:21:45,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:45,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:45,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:21:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:45,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:21:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:21:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:21:45,407 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:45,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:45,650 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:45,700 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:45,701 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:21:45,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:45 BoogieIcfgContainer [2021-11-25 20:21:45,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:45,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:45,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:45,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:45,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:44" (1/3) ... [2021-11-25 20:21:45,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a218e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:45, skipping insertion in model container [2021-11-25 20:21:45,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:45" (2/3) ... [2021-11-25 20:21:45,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a218e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:45, skipping insertion in model container [2021-11-25 20:21:45,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:45" (3/3) ... [2021-11-25 20:21:45,711 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-write.c [2021-11-25 20:21:45,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:45,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-25 20:21:45,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:45,770 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 20:21:45,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-25 20:21:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:45,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:45,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:45,801 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:45,813 INFO L85 PathProgramCache]: Analyzing trace with hash 4075446, now seen corresponding path program 1 times [2021-11-25 20:21:45,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414042888] [2021-11-25 20:21:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:45,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:46,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414042888] [2021-11-25 20:21:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414042888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:46,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:46,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542472047] [2021-11-25 20:21:46,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:46,070 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-11-25 20:21:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,158 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-25 20:21:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2021-11-25 20:21:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,169 INFO L225 Difference]: With dead ends: 39 [2021-11-25 20:21:46,169 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 20:21:46,172 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 20:21:46,178 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 20:21:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2021-11-25 20:21:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 2.076923076923077) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-11-25 20:21:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-25 20:21:46,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2021-11-25 20:21:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:46,219 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-25 20:21:46,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-11-25 20:21:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-25 20:21:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:46,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:46,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:46,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:46,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash 3972391, now seen corresponding path program 1 times [2021-11-25 20:21:46,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:46,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996286087] [2021-11-25 20:21:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:46,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:46,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996286087] [2021-11-25 20:21:46,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996286087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:46,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:46,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:46,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848929052] [2021-11-25 20:21:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:46,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:46,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:46,332 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,423 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-25 20:21:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 20:21:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,425 INFO L225 Difference]: With dead ends: 22 [2021-11-25 20:21:46,425 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:21:46,425 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 [2021-11-25 20:21:46,427 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:21:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 20:21:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 20:21:46,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2021-11-25 20:21:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 20:21:46,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 20:21:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:46,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:46,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:46,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:21:46,443 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash 3972392, now seen corresponding path program 1 times [2021-11-25 20:21:46,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:46,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554837076] [2021-11-25 20:21:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:46,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:46,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554837076] [2021-11-25 20:21:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554837076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:46,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:46,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:46,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549423713] [2021-11-25 20:21:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:46,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:46,549 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,695 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-11-25 20:21:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 20:21:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,711 INFO L225 Difference]: With dead ends: 51 [2021-11-25 20:21:46,711 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 20:21:46,712 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 [2021-11-25 20:21:46,713 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 14 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 20:21:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2021-11-25 20:21:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 20:21:46,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 4 [2021-11-25 20:21:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:46,719 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 20:21:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 20:21:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:21:46,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:46,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:21:46,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:21:46,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 123235085, now seen corresponding path program 1 times [2021-11-25 20:21:46,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959996700] [2021-11-25 20:21:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:46,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:46,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959996700] [2021-11-25 20:21:46,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959996700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:46,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:46,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:46,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913109089] [2021-11-25 20:21:46,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:46,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:46,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:46,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:46,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:46,799 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-25 20:21:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,849 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-25 20:21:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 [2021-11-25 20:21:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,851 INFO L225 Difference]: With dead ends: 22 [2021-11-25 20:21:46,851 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:21:46,851 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 [2021-11-25 20:21:46,853 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:21:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 20:21:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 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) [2021-11-25 20:21:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-25 20:21:46,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-11-25 20:21:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:46,868 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-25 20:21:46,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-25 20:21:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-25 20:21:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:21:46,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:46,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:21:46,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:21:46,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 123235086, now seen corresponding path program 1 times [2021-11-25 20:21:46,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:46,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381062470] [2021-11-25 20:21:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:46,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:46,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381062470] [2021-11-25 20:21:46,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381062470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:46,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:46,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192795565] [2021-11-25 20:21:46,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:46,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:46,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:46,919 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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) [2021-11-25 20:21:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,963 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-25 20:21:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 [2021-11-25 20:21:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,964 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:21:46,964 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 20:21:46,964 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 [2021-11-25 20:21:46,966 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 9 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 20:21:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-25 20:21:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-25 20:21:46,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2021-11-25 20:21:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-25 20:21:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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) [2021-11-25 20:21:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-25 20:21:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:21:46,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:46,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:21:46,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:21:46,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 20:21:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 123144114, now seen corresponding path program 1 times [2021-11-25 20:21:46,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:46,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385662859] [2021-11-25 20:21:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:46,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:21:46,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:21:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:21:47,024 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:21:47,025 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:21:47,026 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-25 20:21:47,027 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-25 20:21:47,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-25 20:21:47,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-25 20:21:47,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-25 20:21:47,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-25 20:21:47,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-25 20:21:47,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-25 20:21:47,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-25 20:21:47,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-25 20:21:47,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-25 20:21:47,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:21:47,033 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-25 20:21:47,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:21:47,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:21:47 BoogieIcfgContainer [2021-11-25 20:21:47,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:21:47,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:21:47,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:21:47,059 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:21:47,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:45" (3/4) ... [2021-11-25 20:21:47,061 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 20:21:47,093 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:21:47,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:21:47,094 INFO L158 Benchmark]: Toolchain (without parser) took 2279.18ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 45.1MB in the beginning and 52.5MB in the end (delta: -7.4MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,094 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 61.4MB in the beginning and 61.3MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:21:47,094 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.65ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 44.9MB in the beginning and 74.9MB in the end (delta: -30.0MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.28ms. Allocated memory is still 98.6MB. Free memory was 74.7MB in the beginning and 73.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,095 INFO L158 Benchmark]: Boogie Preprocessor took 52.78ms. Allocated memory is still 98.6MB. Free memory was 73.2MB in the beginning and 71.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,096 INFO L158 Benchmark]: RCFGBuilder took 461.86ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 57.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,096 INFO L158 Benchmark]: TraceAbstraction took 1353.40ms. Allocated memory is still 98.6MB. Free memory was 57.3MB in the beginning and 54.1MB in the end (delta: 3.2MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2021-11-25 20:21:47,096 INFO L158 Benchmark]: Witness Printer took 34.30ms. Allocated memory is still 98.6MB. Free memory was 54.1MB in the beginning and 52.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:21:47,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 61.4MB in the beginning and 61.3MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.65ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 44.9MB in the beginning and 74.9MB in the end (delta: -30.0MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.28ms. Allocated memory is still 98.6MB. Free memory was 74.7MB in the beginning and 73.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.78ms. Allocated memory is still 98.6MB. Free memory was 73.2MB in the beginning and 71.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 461.86ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 57.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1353.40ms. Allocated memory is still 98.6MB. Free memory was 57.3MB in the beginning and 54.1MB in the end (delta: 3.2MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. * Witness Printer took 34.30ms. Allocated memory is still 98.6MB. Free memory was 54.1MB in the beginning and 52.5MB in the end (delta: 1.7MB). There was no memory consumed. 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: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 VAL [b={3:0}, i=0] [L33] COND TRUE i < 100 [L34] CALL foo(i, b, i + 1) [L21] int a[n], i; [L22] i = 0 VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, i=0, n=0, size=1] [L22] COND TRUE i < size VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, i=0, n=0, size=1] [L23] EXPR b[i] VAL [\old(n)=0, \old(size)=1, a={2:0}, b={3:0}, b={3:0}, b[i]=401, i=0, n=0, size=1] [L23] a[i] = b[i] - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 34]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 34]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 37]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 37]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: 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, 24 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 125 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175 IncrementalHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 42 mSDtfsCounter, 175 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 45 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 86 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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! [2021-11-25 20:21:47,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbb83a9-b12d-4497-8881-c86294ca89fa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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-deref)