./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:57:58,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:57:58,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:57:58,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:57:58,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:57:58,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:57:58,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:57:58,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:57:58,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:57:58,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:57:58,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:57:58,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:57:58,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:57:58,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:57:58,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:57:58,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:57:58,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:57:58,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:57:58,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:57:58,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:57:58,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:57:58,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:57:58,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:57:58,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:57:58,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:57:58,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:57:58,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:57:58,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:57:58,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:57:58,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:57:58,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:57:58,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:57:58,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:57:58,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:57:58,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:57:58,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:57:58,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:57:58,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:57:58,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:57:58,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:57:58,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:57:58,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:57:58,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:57:58,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:57:58,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:57:58,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:57:58,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:57:58,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:57:58,421 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:57:58,422 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:57:58,422 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:57:58,422 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:57:58,423 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:57:58,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:57:58,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:57:58,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:57:58,424 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:57:58,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:57:58,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:57:58,425 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:57:58,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:57:58,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:57:58,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:57:58,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:57:58,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:57:58,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:57:58,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:57:58,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:57:58,427 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:57:58,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:57:58,428 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:57:58,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:57:58,428 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:57:58,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:57:58,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:57:58,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:57:58,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:57:58,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:57:58,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:57:58,430 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:57:58,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:57:58,430 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:57:58,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:57:58,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:57:58,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-11-25 23:57:58,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:57:58,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:57:58,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:57:58,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:57:58,712 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:57:58,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-25 23:58:01,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:58:02,127 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:58:02,127 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-25 23:58:02,133 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/data/38d8b9d40/4f7b949a022d4d8081d58c6b2c78f356/FLAG00b29da2d [2022-11-25 23:58:02,148 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/data/38d8b9d40/4f7b949a022d4d8081d58c6b2c78f356 [2022-11-25 23:58:02,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:58:02,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:58:02,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:58:02,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:58:02,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:58:02,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748bb937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02, skipping insertion in model container [2022-11-25 23:58:02,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:58:02,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:58:02,373 WARN L237 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_421f72be-7849-413f-ad5a-4d2e206048e6/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-25 23:58:02,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:58:02,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:58:02,465 WARN L237 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_421f72be-7849-413f-ad5a-4d2e206048e6/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-25 23:58:02,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:58:02,504 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:58:02,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02 WrapperNode [2022-11-25 23:58:02,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:58:02,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:58:02,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:58:02,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:58:02,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,545 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-11-25 23:58:02,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:58:02,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:58:02,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:58:02,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:58:02,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:58:02,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:58:02,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:58:02,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:58:02,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (1/1) ... [2022-11-25 23:58:02,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:58:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:02,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:58:02,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:58:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:58:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 23:58:02,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 23:58:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:58:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:58:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:58:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:58:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:58:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:58:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-25 23:58:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-25 23:58:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:58:02,798 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:58:02,800 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:58:03,357 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:58:03,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:58:03,442 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-25 23:58:03,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:58:03 BoogieIcfgContainer [2022-11-25 23:58:03,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:58:03,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:58:03,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:58:03,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:58:03,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:58:02" (1/3) ... [2022-11-25 23:58:03,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3e1503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:58:03, skipping insertion in model container [2022-11-25 23:58:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:58:02" (2/3) ... [2022-11-25 23:58:03,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3e1503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:58:03, skipping insertion in model container [2022-11-25 23:58:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:58:03" (3/3) ... [2022-11-25 23:58:03,471 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-11-25 23:58:03,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:58:03,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-25 23:58:03,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:58:03,551 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@734d9545, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:58:03,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-11-25 23:58:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:58:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:58:03,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:03,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:03,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -400663964, now seen corresponding path program 1 times [2022-11-25 23:58:03,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:03,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628334780] [2022-11-25 23:58:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:04,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:04,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628334780] [2022-11-25 23:58:04,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628334780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:04,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:04,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:58:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456141478] [2022-11-25 23:58:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:04,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:58:04,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:58:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:58:04,131 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:04,379 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-25 23:58:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:58:04,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-11-25 23:58:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:04,389 INFO L225 Difference]: With dead ends: 76 [2022-11-25 23:58:04,390 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 23:58:04,391 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:58:04,395 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:04,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:58:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 23:58:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-25 23:58:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:58:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-11-25 23:58:04,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2022-11-25 23:58:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:04,437 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-11-25 23:58:04,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-11-25 23:58:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:58:04,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:04,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:58:04,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -400663963, now seen corresponding path program 1 times [2022-11-25 23:58:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705502265] [2022-11-25 23:58:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:05,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705502265] [2022-11-25 23:58:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705502265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:05,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:05,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:58:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293353006] [2022-11-25 23:58:05,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:05,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:58:05,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:58:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:58:05,291 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-25 23:58:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:06,537 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2022-11-25 23:58:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:58:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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 20 [2022-11-25 23:58:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:06,539 INFO L225 Difference]: With dead ends: 201 [2022-11-25 23:58:06,540 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 23:58:06,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:58:06,541 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 599 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:06,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:58:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 23:58:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2022-11-25 23:58:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 96 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2022-11-25 23:58:06,557 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2022-11-25 23:58:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:06,557 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2022-11-25 23:58:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-25 23:58:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2022-11-25 23:58:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:58:06,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:06,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:06,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:58:06,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash -529353396, now seen corresponding path program 1 times [2022-11-25 23:58:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088388853] [2022-11-25 23:58:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:07,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088388853] [2022-11-25 23:58:07,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088388853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050418890] [2022-11-25 23:58:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:07,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:07,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:07,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:58:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:58:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:07,611 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-25 23:58:07,622 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:58:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-11-25 23:58:07,972 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:58:07,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:58:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:58:08,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:08,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050418890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:08,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716639363] [2022-11-25 23:58:08,693 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:58:08,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:08,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:08,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:08,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:09,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:58:09,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-25 23:58:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:09,340 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:58:09,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-25 23:58:09,374 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:58:09,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-25 23:58:09,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:09,557 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:09,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:09,764 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:10,135 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-25 23:58:10,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:10,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:13,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_#t~malloc16#1.base|)) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_main_~i~1#1| 0) (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_main_#t~malloc16#1.base|) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= (select |#valid| |ULTIMATE.start_main_#t~malloc16#1.base|) 1) (< |ULTIMATE.start_main_#t~malloc15#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| |ULTIMATE.start_main_#t~malloc16#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_#t~malloc15#1.offset|) (< |ULTIMATE.start_main_#t~malloc16#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_is_pow2_#res#1| 0)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= (select |#valid| |ULTIMATE.start_main_#t~malloc15#1.base|) 1) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc16#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (= (ite (= (mod |ULTIMATE.start_is_pow2_~x#1| 4294967296) 1) 1 0) |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0)) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |#NULL.base| 0))' at error location [2022-11-25 23:58:13,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:13,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:58:13,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-25 23:58:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299884215] [2022-11-25 23:58:13,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:58:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:13,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:58:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:58:13,698 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:58:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:15,960 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2022-11-25 23:58:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:58:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 21 [2022-11-25 23:58:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:15,962 INFO L225 Difference]: With dead ends: 205 [2022-11-25 23:58:15,962 INFO L226 Difference]: Without dead ends: 205 [2022-11-25 23:58:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 23:58:15,965 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1036 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:15,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 296 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 23:58:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-25 23:58:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 84. [2022-11-25 23:58:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 74 states have internal predecessors, (83), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2022-11-25 23:58:15,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 21 [2022-11-25 23:58:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:15,975 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2022-11-25 23:58:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:58:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2022-11-25 23:58:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:58:15,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:15,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:15,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:16,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:16,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash 464319011, now seen corresponding path program 1 times [2022-11-25 23:58:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:16,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102942427] [2022-11-25 23:58:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:16,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:16,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102942427] [2022-11-25 23:58:16,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102942427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:16,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:16,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:58:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225510554] [2022-11-25 23:58:16,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:58:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:58:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:58:16,241 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 23:58:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:16,317 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-25 23:58:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:58:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 21 [2022-11-25 23:58:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:16,319 INFO L225 Difference]: With dead ends: 83 [2022-11-25 23:58:16,319 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 23:58:16,319 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:58:16,320 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:16,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:58:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 23:58:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-25 23:58:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 73 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-25 23:58:16,328 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-11-25 23:58:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:16,328 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-25 23:58:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 23:58:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-25 23:58:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:58:16,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:16,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:58:16,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash 464319012, now seen corresponding path program 1 times [2022-11-25 23:58:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181666716] [2022-11-25 23:58:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:16,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181666716] [2022-11-25 23:58:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181666716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:16,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:16,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:58:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742058446] [2022-11-25 23:58:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:58:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:58:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:16,593 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:17,102 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2022-11-25 23:58:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:58:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-25 23:58:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:17,103 INFO L225 Difference]: With dead ends: 137 [2022-11-25 23:58:17,103 INFO L226 Difference]: Without dead ends: 137 [2022-11-25 23:58:17,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:58:17,104 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 297 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 77 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:58:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-25 23:58:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2022-11-25 23:58:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 2.0) internal successors, (134), 96 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 148 transitions. [2022-11-25 23:58:17,112 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 148 transitions. Word has length 21 [2022-11-25 23:58:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:17,113 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 148 transitions. [2022-11-25 23:58:17,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 148 transitions. [2022-11-25 23:58:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:58:17,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:17,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:17,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:58:17,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 464496812, now seen corresponding path program 1 times [2022-11-25 23:58:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:17,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867519025] [2022-11-25 23:58:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:17,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867519025] [2022-11-25 23:58:17,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867519025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:17,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:17,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:58:17,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957515439] [2022-11-25 23:58:17,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:17,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:58:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:58:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:58:17,279 INFO L87 Difference]: Start difference. First operand 106 states and 148 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:17,384 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2022-11-25 23:58:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:58:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-25 23:58:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:17,386 INFO L225 Difference]: With dead ends: 100 [2022-11-25 23:58:17,386 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 23:58:17,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:17,389 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:17,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 74 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:58:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 23:58:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-25 23:58:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 90 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-11-25 23:58:17,419 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2022-11-25 23:58:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:17,420 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-11-25 23:58:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-11-25 23:58:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:58:17,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:17,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:58:17,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 464496813, now seen corresponding path program 1 times [2022-11-25 23:58:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325640059] [2022-11-25 23:58:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:58:17,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325640059] [2022-11-25 23:58:17,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325640059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:17,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:17,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:58:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450435468] [2022-11-25 23:58:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:17,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:58:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:58:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:58:17,632 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:17,808 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2022-11-25 23:58:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:58:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-25 23:58:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:17,811 INFO L225 Difference]: With dead ends: 133 [2022-11-25 23:58:17,811 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 23:58:17,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:58:17,812 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 312 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:17,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 226 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:58:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 23:58:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 70. [2022-11-25 23:58:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.75) internal successors, (70), 63 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:58:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-25 23:58:17,816 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 21 [2022-11-25 23:58:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:17,816 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-25 23:58:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-25 23:58:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:58:17,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:17,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:17,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:58:17,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -465867667, now seen corresponding path program 1 times [2022-11-25 23:58:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:17,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178180917] [2022-11-25 23:58:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:58:18,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:18,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178180917] [2022-11-25 23:58:18,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178180917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:18,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121507747] [2022-11-25 23:58:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:18,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:18,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:58:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:58:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:18,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:58:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121507747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:18,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:58:18,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-11-25 23:58:18,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360432680] [2022-11-25 23:58:18,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:18,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:58:18,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:58:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:58:18,369 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:18,639 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-11-25 23:58:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:58:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-11-25 23:58:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:18,641 INFO L225 Difference]: With dead ends: 129 [2022-11-25 23:58:18,641 INFO L226 Difference]: Without dead ends: 129 [2022-11-25 23:58:18,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:58:18,642 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 283 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:18,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 229 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:58:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-25 23:58:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2022-11-25 23:58:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-25 23:58:18,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 23 [2022-11-25 23:58:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:18,646 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-25 23:58:18,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:58:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-25 23:58:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:58:18,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:18,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:18,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:18,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1153029158, now seen corresponding path program 1 times [2022-11-25 23:58:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056031542] [2022-11-25 23:58:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:18,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:19,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056031542] [2022-11-25 23:58:19,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056031542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594496773] [2022-11-25 23:58:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:19,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:19,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:19,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:19,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:58:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:58:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:19,475 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-25 23:58:19,484 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:58:19,654 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:58:19,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:58:19,671 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:58:19,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:58:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:58:22,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594496773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798969908] [2022-11-25 23:58:25,296 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 23:58:25,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:25,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:25,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:25,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:25,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:58:25,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-25 23:58:25,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:25,836 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:58:25,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-25 23:58:25,874 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:58:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-25 23:58:25,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:26,012 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:26,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:26,173 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:26,305 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-25 23:58:26,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-25 23:58:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:26,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:26,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:26,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:26,512 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:26,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:26,716 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-25 23:58:26,748 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:26,751 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:29,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2292#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:58:29,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:29,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:58:29,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-11-25 23:58:29,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388260781] [2022-11-25 23:58:29,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:29,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:58:29,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:58:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1525, Unknown=3, NotChecked=0, Total=1722 [2022-11-25 23:58:29,927 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:58:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:31,990 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-11-25 23:58:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:58:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24 [2022-11-25 23:58:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:31,992 INFO L225 Difference]: With dead ends: 133 [2022-11-25 23:58:31,992 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 23:58:31,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=419, Invalid=2884, Unknown=3, NotChecked=0, Total=3306 [2022-11-25 23:58:31,994 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 776 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 276 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:58:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 23:58:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2022-11-25 23:58:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.62) internal successors, (81), 73 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-11-25 23:58:31,999 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 24 [2022-11-25 23:58:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:31,999 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-11-25 23:58:32,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:58:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-11-25 23:58:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:58:32,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:32,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:32,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:58:32,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1556818011, now seen corresponding path program 1 times [2022-11-25 23:58:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:32,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607425417] [2022-11-25 23:58:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:32,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:32,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607425417] [2022-11-25 23:58:32,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607425417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:32,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356182805] [2022-11-25 23:58:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:32,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:32,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:58:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:58:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:32,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:32,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-25 23:58:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:33,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356182805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147550564] [2022-11-25 23:58:33,098 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-25 23:58:33,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:33,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:33,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:33,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:33,333 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-25 23:58:33,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-25 23:58:33,503 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:33,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:33,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:33,749 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:33,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:34,027 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-25 23:58:34,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-25 23:58:34,218 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:34,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:34,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:58:34,512 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:34,686 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:34,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:34,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:58:34,943 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:35,168 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-25 23:58:35,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-25 23:58:35,350 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-25 23:58:35,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-25 23:58:35,625 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:35,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:35,903 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:35,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:36,050 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-25 23:58:36,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:36,059 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:36,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:40,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2720#(and (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_is_pow2_~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (or (not (<= 4 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)))) (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|)))) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (<= |ULTIMATE.start_main_~i~1#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-25 23:58:40,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:40,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:58:40,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-11-25 23:58:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827884804] [2022-11-25 23:58:40,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:58:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:58:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:58:40,746 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:58:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:41,667 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-11-25 23:58:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:58:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2022-11-25 23:58:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:41,668 INFO L225 Difference]: With dead ends: 129 [2022-11-25 23:58:41,668 INFO L226 Difference]: Without dead ends: 129 [2022-11-25 23:58:41,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 23:58:41,670 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1392 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:41,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 189 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:58:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-25 23:58:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2022-11-25 23:58:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.6) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-11-25 23:58:41,677 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 24 [2022-11-25 23:58:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:41,678 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-11-25 23:58:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:58:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-11-25 23:58:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:58:41,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:41,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:41,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:58:41,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1384165507, now seen corresponding path program 1 times [2022-11-25 23:58:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923949776] [2022-11-25 23:58:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:58:42,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923949776] [2022-11-25 23:58:42,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923949776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418728963] [2022-11-25 23:58:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:42,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:42,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:42,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:58:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:42,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:58:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:42,358 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-25 23:58:42,596 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:58:42,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 23:58:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:58:43,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:43,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418728963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440084599] [2022-11-25 23:58:43,441 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 23:58:43,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:43,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:43,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:43,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:43,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-25 23:58:43,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:58:43,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:43,927 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:58:43,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-25 23:58:43,961 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:58:43,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-25 23:58:44,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:44,109 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:44,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:44,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:44,325 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-25 23:58:44,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-25 23:58:44,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:44,426 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:44,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:44,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:44,469 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:44,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:44,593 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-25 23:58:44,623 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:44,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:47,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3111#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~a0~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~a0~0#1.base|))) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4))) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:58:47,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:47,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:58:47,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 23:58:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591116585] [2022-11-25 23:58:47,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:58:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:58:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:58:47,208 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:58:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:47,827 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-25 23:58:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:58:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-11-25 23:58:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:47,829 INFO L225 Difference]: With dead ends: 80 [2022-11-25 23:58:47,829 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 23:58:47,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 23:58:47,830 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:47,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 61 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:58:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 23:58:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-25 23:58:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.56) internal successors, (78), 70 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-11-25 23:58:47,834 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2022-11-25 23:58:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:47,834 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-11-25 23:58:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:58:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-11-25 23:58:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:58:47,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:47,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:47,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:48,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:48,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877298, now seen corresponding path program 1 times [2022-11-25 23:58:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:48,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614596880] [2022-11-25 23:58:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:48,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614596880] [2022-11-25 23:58:48,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614596880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:48,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:58:48,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:58:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725818947] [2022-11-25 23:58:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:58:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:58:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:58:48,096 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:58:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:48,168 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-11-25 23:58:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:58:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-25 23:58:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:48,170 INFO L225 Difference]: With dead ends: 77 [2022-11-25 23:58:48,170 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 23:58:48,170 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:58:48,171 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:48,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 70 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:58:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 23:58:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 23:58:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.5) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-11-25 23:58:48,174 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 25 [2022-11-25 23:58:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:48,174 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-11-25 23:58:48,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:58:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-11-25 23:58:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:58:48,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:48,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:58:48,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877297, now seen corresponding path program 1 times [2022-11-25 23:58:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:48,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760666471] [2022-11-25 23:58:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:48,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760666471] [2022-11-25 23:58:48,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760666471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373656592] [2022-11-25 23:58:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:48,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:48,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:48,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:48,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:58:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:58:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:48,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373656592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299108195] [2022-11-25 23:58:48,482 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-25 23:58:48,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:48,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:48,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:48,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:48,695 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-25 23:58:48,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-25 23:58:48,828 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:48,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:48,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:49,037 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:49,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:49,300 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-25 23:58:49,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-25 23:58:49,489 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:49,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:49,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:58:49,712 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:49,860 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:49,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:50,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:58:50,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:50,281 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-25 23:58:50,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-25 23:58:50,464 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-25 23:58:50,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-11-25 23:58:50,707 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:58:50,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:58:50,964 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:58:50,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:58:51,091 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-25 23:58:51,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:51,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:51,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:54,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [299108195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:54,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:58:54,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 5, 5] total 26 [2022-11-25 23:58:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060799212] [2022-11-25 23:58:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:58:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:54,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:58:54,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:58:54,584 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:58:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:55,588 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-11-25 23:58:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:58:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-25 23:58:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:55,590 INFO L225 Difference]: With dead ends: 115 [2022-11-25 23:58:55,590 INFO L226 Difference]: Without dead ends: 115 [2022-11-25 23:58:55,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:58:55,591 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:55,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 222 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:58:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-25 23:58:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-11-25 23:58:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 69 states have internal predecessors, (77), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:58:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-11-25 23:58:55,594 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 25 [2022-11-25 23:58:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:55,594 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-11-25 23:58:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:58:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-11-25 23:58:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:58:55,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:55,595 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:55,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:55,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:58:55,796 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:58:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1256648948, now seen corresponding path program 2 times [2022-11-25 23:58:55,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088533374] [2022-11-25 23:58:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:55,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:56,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:56,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088533374] [2022-11-25 23:58:56,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088533374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:56,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679990983] [2022-11-25 23:58:56,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:58:56,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:56,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:56,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:58:56,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:58:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:58:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:58:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:56,492 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:58:56,503 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-25 23:58:56,712 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:58:56,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:58:56,731 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:58:56,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:58:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:57,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679990983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447156664] [2022-11-25 23:58:57,735 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 23:58:57,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:57,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:57,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:57,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:57,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:58:57,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-25 23:58:57,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:58:58,084 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:58:58,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-25 23:58:58,118 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:58:58,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-25 23:58:58,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:58,248 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:58,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:58:58,340 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:58:58,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 23:58:58,523 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-25 23:58:58,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-25 23:58:58,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:58,617 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:58,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:58,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:58,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:58:58,794 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-25 23:58:58,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:58:58,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:01,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3968#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:59:01,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:59:01,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:59:01,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-25 23:59:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804454107] [2022-11-25 23:59:01,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:59:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:59:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 23:59:01,839 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:59:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:03,279 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-11-25 23:59:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:59:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 27 [2022-11-25 23:59:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:03,280 INFO L225 Difference]: With dead ends: 115 [2022-11-25 23:59:03,280 INFO L226 Difference]: Without dead ends: 115 [2022-11-25 23:59:03,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 23:59:03,282 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 410 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:03,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 183 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:59:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-25 23:59:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2022-11-25 23:59:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:59:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-11-25 23:59:03,286 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2022-11-25 23:59:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:03,286 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-11-25 23:59:03,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:59:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-11-25 23:59:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:59:03,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:03,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:03,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:59:03,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:59:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618557, now seen corresponding path program 1 times [2022-11-25 23:59:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:03,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587235417] [2022-11-25 23:59:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:59:03,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587235417] [2022-11-25 23:59:03,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587235417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:03,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:59:03,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:59:03,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034049311] [2022-11-25 23:59:03,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:03,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:59:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:59:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:59:03,563 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:59:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:03,654 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-25 23:59:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:59:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2022-11-25 23:59:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:03,656 INFO L225 Difference]: With dead ends: 77 [2022-11-25 23:59:03,656 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 23:59:03,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:59:03,656 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:03,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 93 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:59:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 23:59:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 23:59:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 66 states have internal predecessors, (74), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:59:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-25 23:59:03,660 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 27 [2022-11-25 23:59:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:03,660 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-25 23:59:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:59:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-25 23:59:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:59:03,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:03,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:03,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 23:59:03,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:59:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618556, now seen corresponding path program 1 times [2022-11-25 23:59:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503139129] [2022-11-25 23:59:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:59:03,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503139129] [2022-11-25 23:59:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503139129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109058562] [2022-11-25 23:59:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:03,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:03,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:03,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:59:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:59:04,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:59:04,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:04,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 23:59:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:59:04,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109058562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:04,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533491863] [2022-11-25 23:59:04,274 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:59:04,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:04,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:04,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:04,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:04,440 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-25 23:59:04,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-25 23:59:04,564 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:04,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:04,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:04,772 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:04,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:05,028 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-25 23:59:05,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-25 23:59:05,208 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:05,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:05,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:59:05,443 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:05,591 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:05,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:05,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:59:05,850 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 23:59:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:06,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 23:59:06,283 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-25 23:59:06,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 488 treesize of output 484 [2022-11-25 23:59:06,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:06,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 483 treesize of output 475 [2022-11-25 23:59:07,039 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:07,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:07,294 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:07,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:07,420 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-25 23:59:07,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:07,428 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:59:07,430 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:15,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [533491863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:15,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:59:15,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10, 6, 6] total 36 [2022-11-25 23:59:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123860443] [2022-11-25 23:59:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:15,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:59:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:59:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:59:15,788 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:17,874 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2022-11-25 23:59:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:59:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-11-25 23:59:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:17,876 INFO L225 Difference]: With dead ends: 99 [2022-11-25 23:59:17,876 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 23:59:17,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:59:17,877 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:17,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 159 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 23:59:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 23:59:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-11-25 23:59:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 80 states have internal predecessors, (94), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:59:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-11-25 23:59:17,881 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 27 [2022-11-25 23:59:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:17,881 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-11-25 23:59:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-11-25 23:59:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:59:17,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:17,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:17,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:18,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:59:18,089 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:59:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash -748476946, now seen corresponding path program 1 times [2022-11-25 23:59:18,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333514953] [2022-11-25 23:59:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:18,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:59:18,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333514953] [2022-11-25 23:59:18,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333514953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807956862] [2022-11-25 23:59:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:18,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:18,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:59:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:59:18,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:59:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:18,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 23:59:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:59:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807956862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891419462] [2022-11-25 23:59:18,686 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-25 23:59:18,686 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:18,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:18,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:18,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:18,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-25 23:59:18,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:59:19,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:19,091 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-25 23:59:19,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-25 23:59:19,124 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:59:19,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-25 23:59:19,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:59:19,266 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:19,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:59:19,362 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:19,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 23:59:19,525 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-25 23:59:19,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-25 23:59:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:19,623 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:59:19,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:59:19,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:19,662 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:59:19,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:59:19,948 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-25 23:59:19,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:59:19,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:23,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1891419462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:23,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:59:23,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [9, 8, 8] total 39 [2022-11-25 23:59:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74504410] [2022-11-25 23:59:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:59:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:59:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:59:23,967 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:28,998 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2022-11-25 23:59:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:59:28,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-25 23:59:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:29,001 INFO L225 Difference]: With dead ends: 152 [2022-11-25 23:59:29,001 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 23:59:29,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:59:29,003 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 427 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:29,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 125 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:59:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 23:59:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2022-11-25 23:59:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 90 states have internal predecessors, (109), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:59:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2022-11-25 23:59:29,013 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 29 [2022-11-25 23:59:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:29,013 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2022-11-25 23:59:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2022-11-25 23:59:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:59:29,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:29,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:29,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:29,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 23:59:29,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 23:59:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash 391229284, now seen corresponding path program 1 times [2022-11-25 23:59:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:29,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936475417] [2022-11-25 23:59:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:29,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:59:29,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936475417] [2022-11-25 23:59:29,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936475417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920366220] [2022-11-25 23:59:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:29,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:29,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:59:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 23:59:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:29,772 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:59:29,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:29,878 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:59:29,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:59:29,927 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_240 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_240) |c_#memory_int|)) is different from true [2022-11-25 23:59:29,931 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2022-11-25 23:59:29,978 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2022-11-25 23:59:30,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-25 23:59:30,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-25 23:59:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-25 23:59:30,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:50,215 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2022-11-25 23:59:54,437 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2022-11-25 23:59:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920366220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473607964] [2022-11-25 23:59:54,457 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:59:54,457 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:54,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:54,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:54,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:54,630 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-25 23:59:54,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-25 23:59:54,728 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:54,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:54,910 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:54,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:55,140 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-25 23:59:55,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-25 23:59:55,291 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:55,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:55,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:59:55,501 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:55,632 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:55,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:55,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-25 23:59:55,845 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:59:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:55,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 23:59:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:55,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 23:59:56,170 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-25 23:59:56,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 450 treesize of output 446 [2022-11-25 23:59:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:56,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 445 treesize of output 442 [2022-11-25 23:59:56,922 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-25 23:59:56,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-25 23:59:57,152 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-25 23:59:57,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-25 23:59:57,266 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-25 23:59:57,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 23:59:57,273 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:59:57,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:07,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [473607964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:07,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:00:07,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [13, 16] total 48 [2022-11-26 00:00:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256909849] [2022-11-26 00:00:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:07,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:00:07,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:00:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2162, Unknown=23, NotChecked=294, Total=2756 [2022-11-26 00:00:07,576 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:09,435 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2022-11-26 00:00:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:00:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-26 00:00:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:09,436 INFO L225 Difference]: With dead ends: 114 [2022-11-26 00:00:09,436 INFO L226 Difference]: Without dead ends: 114 [2022-11-26 00:00:09,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=277, Invalid=2162, Unknown=23, NotChecked=294, Total=2756 [2022-11-26 00:00:09,438 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:09,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 144 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:00:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-26 00:00:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2022-11-26 00:00:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.44) internal successors, (108), 90 states have internal predecessors, (108), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:00:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-11-26 00:00:09,442 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 29 [2022-11-26 00:00:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:09,442 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-11-26 00:00:09,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-11-26 00:00:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:00:09,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:09,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:09,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:00:09,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:00:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1869919005, now seen corresponding path program 1 times [2022-11-26 00:00:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390819271] [2022-11-26 00:00:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:09,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:09,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390819271] [2022-11-26 00:00:09,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390819271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:09,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688576761] [2022-11-26 00:00:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:09,788 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:00:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:00:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:09,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:09,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688576761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470389501] [2022-11-26 00:00:09,966 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:00:09,966 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:00:09,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:00:09,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:00:09,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:00:10,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:00:10,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:00:10,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:00:10,780 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:00:10,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:00:10,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:00:10,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:00:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:10,912 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:10,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:10,993 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:11,136 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:00:11,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:00:11,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:11,223 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:11,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:11,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:11,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:11,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:00:11,469 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:00:11,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:00:11,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:14,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1470389501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:14,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:14,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6, 6] total 30 [2022-11-26 00:00:14,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505106826] [2022-11-26 00:00:14,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:14,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:00:14,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:00:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:00:14,982 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:20,039 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2022-11-26 00:00:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:00:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-11-26 00:00:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:20,040 INFO L225 Difference]: With dead ends: 172 [2022-11-26 00:00:20,041 INFO L226 Difference]: Without dead ends: 172 [2022-11-26 00:00:20,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:00:20,042 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 495 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:20,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 122 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:00:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-26 00:00:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 109. [2022-11-26 00:00:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 98 states have internal predecessors, (120), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:00:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2022-11-26 00:00:20,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 31 [2022-11-26 00:00:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:20,047 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2022-11-26 00:00:20,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2022-11-26 00:00:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:00:20,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:20,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:20,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:20,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:20,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:00:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1425596276, now seen corresponding path program 1 times [2022-11-26 00:00:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051089378] [2022-11-26 00:00:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:20,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051089378] [2022-11-26 00:00:20,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051089378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61211885] [2022-11-26 00:00:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:20,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:00:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:00:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:20,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:20,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61211885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:20,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836107756] [2022-11-26 00:00:20,670 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:00:20,670 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:00:20,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:00:20,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:00:20,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:00:20,839 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-26 00:00:20,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-26 00:00:20,960 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:00:20,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:00:21,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:00:21,148 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:00:21,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:00:21,387 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-26 00:00:21,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-26 00:00:21,531 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:00:21,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:00:21,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:00:21,748 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:21,887 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:00:21,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:00:22,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:00:22,079 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:22,221 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:00:22,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-26 00:00:22,357 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:00:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-26 00:00:22,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:00:23,241 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:00:23,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:00:23,458 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:00:23,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:00:23,588 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-26 00:00:23,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:00:23,595 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:00:23,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:33,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [836107756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:33,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:33,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [8, 7, 7] total 35 [2022-11-26 00:00:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182059762] [2022-11-26 00:00:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:00:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:00:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:00:33,176 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:34,584 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-11-26 00:00:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:00:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-11-26 00:00:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:34,585 INFO L225 Difference]: With dead ends: 126 [2022-11-26 00:00:34,585 INFO L226 Difference]: Without dead ends: 126 [2022-11-26 00:00:34,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:00:34,587 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:34,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 186 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:00:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-26 00:00:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2022-11-26 00:00:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 103 states have internal predecessors, (128), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:00:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-11-26 00:00:34,591 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 32 [2022-11-26 00:00:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:34,592 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-11-26 00:00:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:00:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-11-26 00:00:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:00:34,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:34,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:34,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:34,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:00:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2140677764, now seen corresponding path program 1 times [2022-11-26 00:00:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993064687] [2022-11-26 00:00:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:34,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:34,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993064687] [2022-11-26 00:00:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993064687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:34,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717742996] [2022-11-26 00:00:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:34,991 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:00:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:00:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:35,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717742996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135848583] [2022-11-26 00:00:35,267 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:00:35,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:00:35,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:00:35,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:00:35,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:00:35,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:00:35,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:00:35,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:00:35,624 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:00:35,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:00:35,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:00:35,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:00:35,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:35,752 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:35,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:35,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:35,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:00:35,988 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:00:35,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-11-26 00:00:36,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:36,075 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:36,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:36,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:36,339 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:00:36,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:00:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:36,643 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:00:36,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:00:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:36,732 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:00:36,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-26 00:00:36,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:36,983 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:00:36,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-26 00:00:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:37,140 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:00:37,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:00:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:00:37,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:00:37,474 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:00:37,501 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:00:37,502 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:41,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6812#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:00:41,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:00:41,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:41,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-11-26 00:00:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845827954] [2022-11-26 00:00:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:00:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:00:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:00:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:00:41,692 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:00:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:42,199 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2022-11-26 00:00:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:00:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-26 00:00:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:42,209 INFO L225 Difference]: With dead ends: 282 [2022-11-26 00:00:42,209 INFO L226 Difference]: Without dead ends: 282 [2022-11-26 00:00:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:00:42,211 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 657 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:42,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 597 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:00:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-26 00:00:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 131. [2022-11-26 00:00:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4666666666666666) internal successors, (154), 120 states have internal predecessors, (154), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:00:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2022-11-26 00:00:42,219 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 33 [2022-11-26 00:00:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:42,219 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2022-11-26 00:00:42,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:00:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2022-11-26 00:00:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:00:42,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:42,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:42,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:00:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-26 00:00:42,428 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:00:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1695768893, now seen corresponding path program 1 times [2022-11-26 00:00:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:42,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694380711] [2022-11-26 00:00:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:00:42,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694380711] [2022-11-26 00:00:42,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694380711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191651287] [2022-11-26 00:00:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:42,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:42,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:42,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:00:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:00:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:42,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:00:42,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191651287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186626967] [2022-11-26 00:00:42,804 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 00:00:42,804 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:00:42,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:00:42,805 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:00:42,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:00:43,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:00:43,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:00:43,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:00:43,190 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:00:43,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:00:43,218 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:00:43,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:00:43,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:43,346 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:43,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:00:43,437 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:00:43,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:00:43,573 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:00:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-26 00:00:43,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:43,669 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:43,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:43,708 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:00:43,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:00:43,898 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-26 00:00:43,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 262 treesize of output 287 [2022-11-26 00:00:44,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:44,181 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:00:44,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-26 00:00:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:00:44,279 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:00:44,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 261 [2022-11-26 00:00:44,407 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:00:44,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 273 [2022-11-26 00:00:44,499 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-11-26 00:00:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-26 00:00:45,541 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:00:45,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:00:45,566 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:53,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1186626967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:53,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:53,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 6, 6] total 31 [2022-11-26 00:00:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371267829] [2022-11-26 00:00:53,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:00:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:00:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:00:53,382 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:01:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:00,963 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2022-11-26 00:01:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:01:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-11-26 00:01:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:00,967 INFO L225 Difference]: With dead ends: 186 [2022-11-26 00:01:00,967 INFO L226 Difference]: Without dead ends: 186 [2022-11-26 00:01:00,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:01:00,968 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 367 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:00,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 100 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:01:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-26 00:01:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2022-11-26 00:01:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 123 states have internal predecessors, (157), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2022-11-26 00:01:00,974 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 33 [2022-11-26 00:01:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:00,975 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2022-11-26 00:01:00,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:01:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2022-11-26 00:01:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:01:00,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:00,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:00,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:01,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:01:01,183 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 102581881, now seen corresponding path program 1 times [2022-11-26 00:01:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438245525] [2022-11-26 00:01:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:01:01,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438245525] [2022-11-26 00:01:01,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438245525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672922798] [2022-11-26 00:01:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:01,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:01,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:01,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:01,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:01:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:01:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:01:01,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:01:01,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672922798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:01,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238146780] [2022-11-26 00:01:01,624 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:01:01,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:01,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:01,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:01,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:01,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:01:01,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:01:01,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:02,008 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:01:02,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:01:02,035 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:01:02,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:01:02,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:02,134 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:02,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:02,222 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:02,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:01:02,353 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:01:02,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-11-26 00:01:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:02,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:02,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:02,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:02,487 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:02,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:02,753 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:01:02,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:01:03,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:03,056 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:03,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:01:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:03,168 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:03,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-26 00:01:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,276 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:03,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:01:03,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,407 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:03,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-26 00:01:03,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:01:03,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:03,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:01:03,874 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:01:03,902 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:01:03,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:07,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8050#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:07,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:07,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:07,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-26 00:01:07,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697407178] [2022-11-26 00:01:07,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:07,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:01:07,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:07,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:01:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:01:07,595 INFO L87 Difference]: Start difference. First operand 134 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:07,929 INFO L93 Difference]: Finished difference Result 211 states and 247 transitions. [2022-11-26 00:01:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:01:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-26 00:01:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:07,931 INFO L225 Difference]: With dead ends: 211 [2022-11-26 00:01:07,931 INFO L226 Difference]: Without dead ends: 211 [2022-11-26 00:01:07,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:01:07,932 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 265 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 547 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:01:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-26 00:01:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 127. [2022-11-26 00:01:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 116 states have internal predecessors, (143), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2022-11-26 00:01:07,948 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 35 [2022-11-26 00:01:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2022-11-26 00:01:07,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2022-11-26 00:01:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:01:07,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:07,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:07,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 00:01:08,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:08,152 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1300010612, now seen corresponding path program 1 times [2022-11-26 00:01:08,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:08,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173181980] [2022-11-26 00:01:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:08,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:01:08,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173181980] [2022-11-26 00:01:08,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173181980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:08,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:08,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:01:08,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597117448] [2022-11-26 00:01:08,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:08,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:08,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:08,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:08,191 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:08,265 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2022-11-26 00:01:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:08,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-26 00:01:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:08,268 INFO L225 Difference]: With dead ends: 147 [2022-11-26 00:01:08,268 INFO L226 Difference]: Without dead ends: 147 [2022-11-26 00:01:08,269 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:01:08,270 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:08,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-26 00:01:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-11-26 00:01:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 126 states have internal predecessors, (160), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2022-11-26 00:01:08,287 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 35 [2022-11-26 00:01:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:08,287 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2022-11-26 00:01:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2022-11-26 00:01:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:01:08,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:08,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:08,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:01:08,289 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1300010611, now seen corresponding path program 1 times [2022-11-26 00:01:08,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:08,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346129688] [2022-11-26 00:01:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:08,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:01:08,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346129688] [2022-11-26 00:01:08,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346129688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451994948] [2022-11-26 00:01:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:08,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:01:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:01:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:01:08,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:01:08,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451994948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839222740] [2022-11-26 00:01:08,703 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:01:08,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:08,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:08,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:08,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:08,870 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-26 00:01:08,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-26 00:01:09,001 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:01:09,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:01:09,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:09,202 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:01:09,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:01:09,440 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-26 00:01:09,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-26 00:01:09,595 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:01:09,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:01:09,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:01:09,811 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:09,947 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:01:09,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:01:10,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:01:10,160 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:10,299 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:01:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-26 00:01:10,432 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:01:10,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-26 00:01:10,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:01:11,235 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-26 00:01:11,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-26 00:01:11,478 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:01:11,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-26 00:01:11,602 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-26 00:01:11,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:11,614 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:01:11,615 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:22,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8925#(and (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_is_pow2_~x#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= (ite (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~1#1| 1) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (not (< |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (not (<= (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|) (select |#length| |ULTIMATE.start_check_~a0#1.base|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (<= 4 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4))) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:22,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:22,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-26 00:01:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484742065] [2022-11-26 00:01:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:01:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:01:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:01:22,548 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:22,775 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2022-11-26 00:01:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:01:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-26 00:01:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:22,777 INFO L225 Difference]: With dead ends: 143 [2022-11-26 00:01:22,777 INFO L226 Difference]: Without dead ends: 143 [2022-11-26 00:01:22,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:01:22,779 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:22,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 376 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:01:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-26 00:01:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-11-26 00:01:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.439252336448598) internal successors, (154), 122 states have internal predecessors, (154), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-26 00:01:22,784 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 35 [2022-11-26 00:01:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:22,784 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-26 00:01:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-26 00:01:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:01:22,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:22,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:22,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-26 00:01:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:22,991 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 679838038, now seen corresponding path program 2 times [2022-11-26 00:01:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:22,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864189776] [2022-11-26 00:01:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:01:23,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:23,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864189776] [2022-11-26 00:01:23,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864189776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:23,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177591446] [2022-11-26 00:01:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:01:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:23,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:23,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:01:23,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:01:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:01:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:01:23,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:23,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:23,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177591446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493560073] [2022-11-26 00:01:23,913 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:01:23,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:23,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:23,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:23,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:24,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:01:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:01:24,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:24,321 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:01:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:01:24,348 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:01:24,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:01:24,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:24,451 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:24,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:24,534 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:24,621 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:01:24,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:01:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:24,692 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:24,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:24,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:24,730 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:24,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:24,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:01:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:24,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:01:24,976 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:01:25,003 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:01:25,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:29,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9471#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:29,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:29,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:29,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-11-26 00:01:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855202530] [2022-11-26 00:01:29,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:01:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:01:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:01:29,193 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:01:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:31,440 INFO L93 Difference]: Finished difference Result 422 states and 528 transitions. [2022-11-26 00:01:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:01:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-11-26 00:01:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:31,443 INFO L225 Difference]: With dead ends: 422 [2022-11-26 00:01:31,443 INFO L226 Difference]: Without dead ends: 422 [2022-11-26 00:01:31,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=809, Invalid=4741, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:01:31,445 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1140 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:31,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 572 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:01:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-26 00:01:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 138. [2022-11-26 00:01:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 127 states have internal predecessors, (162), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2022-11-26 00:01:31,452 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 36 [2022-11-26 00:01:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:31,452 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2022-11-26 00:01:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:01:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2022-11-26 00:01:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:01:31,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:31,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:31,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-26 00:01:31,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:01:31,659 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1241710387, now seen corresponding path program 1 times [2022-11-26 00:01:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:31,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840183157] [2022-11-26 00:01:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:31,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:01:31,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840183157] [2022-11-26 00:01:31,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840183157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487425362] [2022-11-26 00:01:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:31,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:31,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:01:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:01:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:01:31,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:01:32,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487425362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:32,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392340998] [2022-11-26 00:01:32,021 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:01:32,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:32,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:32,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:32,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:32,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:01:32,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:01:32,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:32,472 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:01:32,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:01:32,506 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:01:32,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:01:32,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:32,635 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:32,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:32,732 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:32,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:01:32,917 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:01:32,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-11-26 00:01:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:33,018 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:33,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:33,062 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:33,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:33,293 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-26 00:01:33,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 290 [2022-11-26 00:01:33,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:33,598 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:01:33,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-26 00:01:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:33,696 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:01:33,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 264 [2022-11-26 00:01:33,840 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-11-26 00:01:33,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-26 00:01:33,943 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-26 00:01:33,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 276 [2022-11-26 00:01:36,762 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:01:36,800 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:01:36,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:47,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10327#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_#in~n#1|) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~n#1|) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 |ULTIMATE.start_upsweep_#in~n#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:47,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:47,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:47,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-11-26 00:01:47,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470057025] [2022-11-26 00:01:47,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:47,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:01:47,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:01:47,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:01:47,254 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:47,441 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-11-26 00:01:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:01:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-26 00:01:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:47,442 INFO L225 Difference]: With dead ends: 143 [2022-11-26 00:01:47,442 INFO L226 Difference]: Without dead ends: 143 [2022-11-26 00:01:47,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:01:47,443 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 178 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:47,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 247 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-26 00:01:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2022-11-26 00:01:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.457142857142857) internal successors, (153), 120 states have internal predecessors, (153), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-11-26 00:01:47,448 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 36 [2022-11-26 00:01:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:47,449 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-11-26 00:01:47,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:01:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-11-26 00:01:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:01:47,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:47,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:47,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:47,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:01:47,656 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 864999468, now seen corresponding path program 1 times [2022-11-26 00:01:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:47,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606984165] [2022-11-26 00:01:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:01:47,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606984165] [2022-11-26 00:01:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606984165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:47,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:47,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205440375] [2022-11-26 00:01:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:01:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:01:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:01:47,712 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-11-26 00:01:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:47,797 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-11-26 00:01:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:01:47,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 36 [2022-11-26 00:01:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:47,798 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:01:47,798 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:01:47,799 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:01:47,799 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:47,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:01:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-26 00:01:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 119 states have internal predecessors, (152), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-11-26 00:01:47,804 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 36 [2022-11-26 00:01:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:47,805 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-11-26 00:01:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-11-26 00:01:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-11-26 00:01:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:01:47,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:47,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:01:47,806 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash -399857295, now seen corresponding path program 1 times [2022-11-26 00:01:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:47,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916482407] [2022-11-26 00:01:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:01:48,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916482407] [2022-11-26 00:01:48,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916482407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200923299] [2022-11-26 00:01:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:48,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:48,478 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:48,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:01:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:01:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:01:48,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:01:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200923299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038538612] [2022-11-26 00:01:49,157 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:01:49,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:49,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:49,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:49,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:49,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:01:49,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:01:49,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:01:49,610 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:01:49,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:01:49,642 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:01:49,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:01:49,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:49,750 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:49,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:01:49,861 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:01:49,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:01:50,003 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:01:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-11-26 00:01:50,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:50,081 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:50,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:50,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:01:50,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:01:50,332 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:01:50,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 282 treesize of output 303 [2022-11-26 00:01:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,627 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:01:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,703 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:50,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-11-26 00:01:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,808 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:50,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 273 treesize of output 306 [2022-11-26 00:01:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:50,961 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:01:50,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:01:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:51,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:01:51,336 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:01:51,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:01:51,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:56,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11144#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:56,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:56,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:56,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-11-26 00:01:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220613093] [2022-11-26 00:01:56,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:56,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:01:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:01:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:01:56,022 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:01:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:59,397 INFO L93 Difference]: Finished difference Result 260 states and 331 transitions. [2022-11-26 00:01:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:01:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 37 [2022-11-26 00:01:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:59,399 INFO L225 Difference]: With dead ends: 260 [2022-11-26 00:01:59,399 INFO L226 Difference]: Without dead ends: 260 [2022-11-26 00:01:59,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=580, Invalid=4676, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 00:01:59,401 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1102 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:59,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 567 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:01:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-26 00:01:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 142. [2022-11-26 00:01:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 117 states have (on average 1.4102564102564104) internal successors, (165), 131 states have internal predecessors, (165), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:01:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-26 00:01:59,408 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 37 [2022-11-26 00:01:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:59,408 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-26 00:01:59,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:01:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-26 00:01:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:01:59,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:59,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:59,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:01:59,617 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:01:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -46172498, now seen corresponding path program 1 times [2022-11-26 00:01:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:59,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601637109] [2022-11-26 00:01:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:01:59,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:59,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601637109] [2022-11-26 00:01:59,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601637109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:59,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300690699] [2022-11-26 00:01:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:59,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:59,857 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:59,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:02:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:02:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:02:00,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:02:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300690699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:00,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:02:00,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-11-26 00:02:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067759075] [2022-11-26 00:02:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:00,045 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:00,151 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2022-11-26 00:02:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:02:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-26 00:02:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:00,153 INFO L225 Difference]: With dead ends: 155 [2022-11-26 00:02:00,153 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 00:02:00,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:02:00,154 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 99 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:00,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 00:02:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-11-26 00:02:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.403361344537815) internal successors, (167), 133 states have internal predecessors, (167), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:02:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2022-11-26 00:02:00,160 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 37 [2022-11-26 00:02:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:00,160 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2022-11-26 00:02:00,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2022-11-26 00:02:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:02:00,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:00,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:00,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:00,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:00,369 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:00,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash -46298516, now seen corresponding path program 1 times [2022-11-26 00:02:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:00,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623491841] [2022-11-26 00:02:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:00,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623491841] [2022-11-26 00:02:00,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623491841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:00,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:00,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:02:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101959066] [2022-11-26 00:02:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:02:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:02:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:02:00,545 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:00,775 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-11-26 00:02:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:00,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-26 00:02:00,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:00,777 INFO L225 Difference]: With dead ends: 180 [2022-11-26 00:02:00,777 INFO L226 Difference]: Without dead ends: 180 [2022-11-26 00:02:00,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:02:00,778 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 200 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:00,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-26 00:02:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2022-11-26 00:02:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 124 states have (on average 1.403225806451613) internal successors, (174), 138 states have internal predecessors, (174), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:02:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2022-11-26 00:02:00,783 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 37 [2022-11-26 00:02:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:00,783 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2022-11-26 00:02:00,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2022-11-26 00:02:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:02:00,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:00,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 00:02:00,786 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1045179935, now seen corresponding path program 1 times [2022-11-26 00:02:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:00,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261847857] [2022-11-26 00:02:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:02:00,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:00,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261847857] [2022-11-26 00:02:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261847857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:00,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:00,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261918136] [2022-11-26 00:02:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:02:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:02:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:00,908 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:01,061 INFO L93 Difference]: Finished difference Result 148 states and 187 transitions. [2022-11-26 00:02:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-26 00:02:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:01,063 INFO L225 Difference]: With dead ends: 148 [2022-11-26 00:02:01,063 INFO L226 Difference]: Without dead ends: 148 [2022-11-26 00:02:01,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:02:01,063 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:01,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-26 00:02:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-26 00:02:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 137 states have internal predecessors, (173), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:02:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-11-26 00:02:01,068 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 37 [2022-11-26 00:02:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:01,068 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-11-26 00:02:01,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-11-26 00:02:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:02:01,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:01,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-26 00:02:01,069 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1435250909, now seen corresponding path program 1 times [2022-11-26 00:02:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626682233] [2022-11-26 00:02:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:01,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:01,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626682233] [2022-11-26 00:02:01,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626682233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:01,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:01,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:02:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503749347] [2022-11-26 00:02:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:02:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:02:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:02:01,223 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:01,470 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-11-26 00:02:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:02:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-26 00:02:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:01,472 INFO L225 Difference]: With dead ends: 197 [2022-11-26 00:02:01,472 INFO L226 Difference]: Without dead ends: 197 [2022-11-26 00:02:01,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:02:01,473 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:01,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 152 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-26 00:02:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2022-11-26 00:02:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 124 states have (on average 1.3709677419354838) internal successors, (170), 135 states have internal predecessors, (170), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:02:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-11-26 00:02:01,478 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 38 [2022-11-26 00:02:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:01,479 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-11-26 00:02:01,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-11-26 00:02:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:02:01,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:01,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:01,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-26 00:02:01,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1959160177, now seen corresponding path program 1 times [2022-11-26 00:02:01,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633807868] [2022-11-26 00:02:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:02:01,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633807868] [2022-11-26 00:02:01,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633807868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:01,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:01,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281525368] [2022-11-26 00:02:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:02:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:02:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:01,710 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:01,917 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2022-11-26 00:02:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-26 00:02:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:01,918 INFO L225 Difference]: With dead ends: 145 [2022-11-26 00:02:01,919 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 00:02:01,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:02:01,920 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:01,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 00:02:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-26 00:02:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.42) internal successors, (142), 110 states have internal predecessors, (142), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2022-11-26 00:02:01,927 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 38 [2022-11-26 00:02:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:01,928 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2022-11-26 00:02:01,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:02:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2022-11-26 00:02:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:02:01,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:01,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:01,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-26 00:02:01,929 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:01,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1539597552, now seen corresponding path program 1 times [2022-11-26 00:02:01,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463082834] [2022-11-26 00:02:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:02:02,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463082834] [2022-11-26 00:02:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463082834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754037359] [2022-11-26 00:02:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:02,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:02,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:02,143 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:02:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:02:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:02:02,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:02:02,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754037359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606084475] [2022-11-26 00:02:02,487 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 00:02:02,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:02,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:02,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:02,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:02,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:02,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:02,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:02,921 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:02,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:02,950 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:02,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:03,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:03,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:03,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:03,178 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:03,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:02:03,319 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:02:03,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-26 00:02:03,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:03,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:03,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:03,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:03,457 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:03,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:03,767 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:02:03,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:02:03,934 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:03,995 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:03,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:02:04,038 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:04,119 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:04,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:02:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:04,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:04,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:04,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:02:04,605 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:04,629 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:04,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:02:11,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13584#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:02:11,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:02:11,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:02:11,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-11-26 00:02:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003145467] [2022-11-26 00:02:11,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:02:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:02:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:02:11,031 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:11,252 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-11-26 00:02:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:02:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-26 00:02:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:11,253 INFO L225 Difference]: With dead ends: 109 [2022-11-26 00:02:11,253 INFO L226 Difference]: Without dead ends: 109 [2022-11-26 00:02:11,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:02:11,254 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 138 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:11,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 221 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-26 00:02:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-11-26 00:02:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 89 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-11-26 00:02:11,258 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 39 [2022-11-26 00:02:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:11,258 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-11-26 00:02:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-11-26 00:02:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:02:11,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:11,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:11,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:11,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:11,471 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 732853998, now seen corresponding path program 1 times [2022-11-26 00:02:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731067339] [2022-11-26 00:02:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:02:11,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731067339] [2022-11-26 00:02:11,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731067339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899080852] [2022-11-26 00:02:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:11,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:11,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:11,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:02:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:11,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:02:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:02:11,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:02:11,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899080852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395946931] [2022-11-26 00:02:11,921 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:02:11,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:11,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:11,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:11,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:12,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:12,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:12,241 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:12,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:12,268 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:12,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:12,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:12,403 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:12,512 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:12,597 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:02:12,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:02:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:12,670 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:12,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:12,715 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:12,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:12,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:12,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:12,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:12,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:13,014 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:02:13,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:02:13,202 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:13,226 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:13,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:02:16,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14091#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:02:16,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:02:16,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:02:16,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 19 [2022-11-26 00:02:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752052994] [2022-11-26 00:02:16,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:02:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:02:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:02:16,900 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:17,412 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2022-11-26 00:02:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:02:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-11-26 00:02:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:17,413 INFO L225 Difference]: With dead ends: 136 [2022-11-26 00:02:17,413 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:02:17,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=372, Invalid=2490, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:02:17,414 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 310 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:17,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 413 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:02:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:02:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2022-11-26 00:02:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 88 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2022-11-26 00:02:17,418 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 42 [2022-11-26 00:02:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2022-11-26 00:02:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2022-11-26 00:02:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:02:17,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:17,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:17,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-26 00:02:17,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 00:02:17,625 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1600932628, now seen corresponding path program 1 times [2022-11-26 00:02:17,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926869884] [2022-11-26 00:02:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:17,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:02:17,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926869884] [2022-11-26 00:02:17,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926869884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428422364] [2022-11-26 00:02:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:17,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:17,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:17,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-26 00:02:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:02:17,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:02:18,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:02:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428422364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345931602] [2022-11-26 00:02:18,159 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-26 00:02:18,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:18,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:18,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:18,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:18,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:18,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:18,592 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:18,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:18,625 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:18,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:18,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:18,719 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:18,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:18,819 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:18,901 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:02:18,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:02:18,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:18,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:18,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:19,000 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:19,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:19,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:02:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,457 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:02:19,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:02:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:19,526 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:02:19,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-26 00:02:19,648 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:19,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:19,722 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:19,867 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:19,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:19,938 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:19,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:20,141 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:20,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:20,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:02:26,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14641#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:02:26,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:02:26,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:02:26,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-26 00:02:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302131653] [2022-11-26 00:02:26,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:02:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:02:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:02:26,536 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:26,854 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-11-26 00:02:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:02:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-26 00:02:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:26,856 INFO L225 Difference]: With dead ends: 125 [2022-11-26 00:02:26,856 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:02:26,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:02:26,857 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 160 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:26,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 372 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:02:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2022-11-26 00:02:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 98 states have internal predecessors, (114), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-11-26 00:02:26,860 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 43 [2022-11-26 00:02:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:26,861 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-11-26 00:02:26,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:02:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-11-26 00:02:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:02:26,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:26,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:26,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-26 00:02:27,068 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 955713917, now seen corresponding path program 2 times [2022-11-26 00:02:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061007720] [2022-11-26 00:02:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:02:27,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061007720] [2022-11-26 00:02:27,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061007720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769380796] [2022-11-26 00:02:27,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:02:27,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:27,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:27,314 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:27,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:02:27,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:02:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:02:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:02:27,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:02:27,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:28,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-26 00:02:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:02:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769380796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267782594] [2022-11-26 00:02:28,497 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:02:28,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:28,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:28,498 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:28,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:29,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:29,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:29,642 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:29,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:29,678 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:29,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:29,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:29,785 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:29,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:29,883 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:29,968 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:02:29,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:02:30,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:30,042 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:30,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:30,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:30,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:30,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:30,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:30,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:30,303 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:30,325 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:30,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:02:34,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15201#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:02:34,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:02:34,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:02:34,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-11-26 00:02:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795363505] [2022-11-26 00:02:34,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:02:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:02:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2515, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:02:34,418 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:02:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:41,738 INFO L93 Difference]: Finished difference Result 382 states and 455 transitions. [2022-11-26 00:02:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-26 00:02:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2022-11-26 00:02:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:41,741 INFO L225 Difference]: With dead ends: 382 [2022-11-26 00:02:41,741 INFO L226 Difference]: Without dead ends: 382 [2022-11-26 00:02:41,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1863, Invalid=12179, Unknown=0, NotChecked=0, Total=14042 [2022-11-26 00:02:41,744 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1577 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:41,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 303 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:02:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-26 00:02:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 137. [2022-11-26 00:02:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.28099173553719) internal successors, (155), 130 states have internal predecessors, (155), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2022-11-26 00:02:41,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 44 [2022-11-26 00:02:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:41,749 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2022-11-26 00:02:41,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:02:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2022-11-26 00:02:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:02:41,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:41,751 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:41,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:41,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-26 00:02:41,959 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -433061561, now seen corresponding path program 2 times [2022-11-26 00:02:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707127134] [2022-11-26 00:02:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:41,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:02:42,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707127134] [2022-11-26 00:02:42,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707127134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022507455] [2022-11-26 00:02:42,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:02:42,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:42,211 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:42,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 00:02:42,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:02:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:02:42,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:02:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:02:42,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:42,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:02:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:02:43,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022507455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:43,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945158554] [2022-11-26 00:02:43,017 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:02:43,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:43,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:43,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:43,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:43,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:43,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:43,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:43,414 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:43,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:43,440 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:43,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:43,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:43,532 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:43,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:43,631 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:43,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:02:43,774 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:02:43,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-11-26 00:02:43,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:43,856 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:43,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:43,893 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:43,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:44,131 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:02:44,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:02:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,527 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:44,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-26 00:02:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,699 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:44,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:02:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:44,851 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:44,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-26 00:02:44,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:44,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:44,989 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:02:44,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:02:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:45,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:45,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:45,380 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:45,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:45,406 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:02:49,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16163#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:02:49,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:02:49,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:02:49,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-11-26 00:02:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104439610] [2022-11-26 00:02:49,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:49,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:02:49,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:02:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:02:49,526 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-26 00:02:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:50,631 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2022-11-26 00:02:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:02:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-11-26 00:02:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:50,632 INFO L225 Difference]: With dead ends: 194 [2022-11-26 00:02:50,633 INFO L226 Difference]: Without dead ends: 194 [2022-11-26 00:02:50,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2022-11-26 00:02:50,634 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 576 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 220 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:02:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-26 00:02:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2022-11-26 00:02:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 128 states have internal predecessors, (152), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:02:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2022-11-26 00:02:50,639 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 45 [2022-11-26 00:02:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:50,639 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2022-11-26 00:02:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-26 00:02:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2022-11-26 00:02:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:02:50,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:50,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:50,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:50,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-26 00:02:50,847 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:02:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash 901566904, now seen corresponding path program 1 times [2022-11-26 00:02:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:50,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519145824] [2022-11-26 00:02:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:02:51,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519145824] [2022-11-26 00:02:51,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519145824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987189625] [2022-11-26 00:02:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:51,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:51,219 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 00:02:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:02:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:02:51,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:51,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:02:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:02:51,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987189625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973960353] [2022-11-26 00:02:51,795 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:02:51,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:02:51,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:02:51,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:02:51,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:02:52,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:02:52,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:02:52,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:02:52,277 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:02:52,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:02:52,305 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:02:52,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:02:52,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:52,411 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:52,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:02:52,501 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:02:52,585 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:02:52,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:02:52,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:52,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:52,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:52,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:02:52,685 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:52,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:02:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:52,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:52,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:02:52,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:02:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,106 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:02:53,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:02:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,175 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:02:53,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2022-11-26 00:02:53,297 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:53,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:53,372 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:53,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:53,488 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:53,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:53,557 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:53,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:02:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:02:53,886 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:53,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:53,971 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:53,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:54,120 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:54,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:54,210 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:54,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:54,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:02:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:02:54,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:02:54,558 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:54,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:54,660 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:54,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:54,814 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:02:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:02:54,901 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:02:54,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:02:55,175 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:02:55,199 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:02:55,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:03:03,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16830#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-11-26 00:03:03,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:03:03,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:03:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-11-26 00:03:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084368341] [2022-11-26 00:03:03,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:03:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:03:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:03:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2164, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:03:03,512 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:03:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:04,146 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-11-26 00:03:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:03:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-11-26 00:03:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:04,148 INFO L225 Difference]: With dead ends: 155 [2022-11-26 00:03:04,148 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 00:03:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:03:04,149 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 336 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:04,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 155 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:03:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 00:03:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2022-11-26 00:03:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 130 states have internal predecessors, (154), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:03:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-11-26 00:03:04,154 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 45 [2022-11-26 00:03:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:04,155 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-11-26 00:03:04,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:03:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-11-26 00:03:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:03:04,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:04,156 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:04,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-26 00:03:04,365 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:03:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -540006496, now seen corresponding path program 2 times [2022-11-26 00:03:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:03:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560104757] [2022-11-26 00:03:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:03:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:03:04,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:03:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560104757] [2022-11-26 00:03:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560104757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:03:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482771129] [2022-11-26 00:03:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:03:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:04,670 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:04,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-26 00:03:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:03:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:03:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:03:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:03:05,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:05,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:03:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:03:06,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482771129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:06,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368571443] [2022-11-26 00:03:06,170 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:03:06,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:03:06,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:03:06,171 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:03:06,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:03:06,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:03:06,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:03:06,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:03:06,565 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:03:06,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:03:06,600 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:03:06,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:03:06,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:06,735 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:06,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:06,855 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:06,968 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:03:06,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:03:07,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:07,052 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:07,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:07,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:07,091 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:07,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:07,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:03:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:07,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:07,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:07,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:07,536 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:03:07,564 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:03:07,565 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:03:12,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17475#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:03:12,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:03:12,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:03:12,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-26 00:03:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882628885] [2022-11-26 00:03:12,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:03:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:03:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:03:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2608, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:03:12,255 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-26 00:03:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:15,280 INFO L93 Difference]: Finished difference Result 253 states and 301 transitions. [2022-11-26 00:03:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:03:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 46 [2022-11-26 00:03:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:15,282 INFO L225 Difference]: With dead ends: 253 [2022-11-26 00:03:15,282 INFO L226 Difference]: Without dead ends: 253 [2022-11-26 00:03:15,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=867, Invalid=5295, Unknown=0, NotChecked=0, Total=6162 [2022-11-26 00:03:15,283 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1378 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:15,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 361 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:03:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-26 00:03:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 147. [2022-11-26 00:03:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.2651515151515151) internal successors, (167), 140 states have internal predecessors, (167), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:03:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2022-11-26 00:03:15,288 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 46 [2022-11-26 00:03:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:15,288 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2022-11-26 00:03:15,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-26 00:03:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2022-11-26 00:03:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:03:15,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:15,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:15,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-26 00:03:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:15,496 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:03:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2116110673, now seen corresponding path program 1 times [2022-11-26 00:03:15,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:03:15,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369064786] [2022-11-26 00:03:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:03:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:03:15,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:03:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369064786] [2022-11-26 00:03:15,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369064786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:03:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245125880] [2022-11-26 00:03:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:15,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:15,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:15,661 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:15,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:03:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:03:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:03:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:03:15,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245125880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412954387] [2022-11-26 00:03:15,962 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:03:15,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:03:15,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:03:15,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:03:15,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:03:16,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:03:16,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:03:16,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:03:16,277 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:03:16,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:03:16,304 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:03:16,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:03:16,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:16,406 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:16,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:16,485 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:16,566 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:03:16,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:03:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:16,653 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:16,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:16,701 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:16,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:16,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:16,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:16,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:16,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:16,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:16,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:16,976 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:03:16,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:03:17,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:03:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,165 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:03:17,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:03:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,238 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:03:17,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2022-11-26 00:03:17,353 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:17,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:17,420 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:17,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:17,537 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:17,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:17,609 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:17,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:03:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:17,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:03:17,978 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:17,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:18,092 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:18,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:18,278 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:18,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:18,368 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:18,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:18,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:18,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:03:18,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:18,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:03:18,725 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:18,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:18,798 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:18,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:18,921 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:18,991 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:18,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:19,176 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:03:19,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:03:19,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:03:26,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18229#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_check_~n#1| |ULTIMATE.start_check_~i~0#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (not (< |ULTIMATE.start_main_~a~0#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 00:03:26,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:03:26,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:03:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-26 00:03:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576155323] [2022-11-26 00:03:26,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:03:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:03:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:03:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:03:26,675 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:03:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:03:26,868 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2022-11-26 00:03:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:03:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-26 00:03:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:03:26,869 INFO L225 Difference]: With dead ends: 150 [2022-11-26 00:03:26,869 INFO L226 Difference]: Without dead ends: 150 [2022-11-26 00:03:26,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:03:26,870 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:03:26,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:03:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-26 00:03:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-11-26 00:03:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.25) internal successors, (165), 140 states have internal predecessors, (165), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:03:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2022-11-26 00:03:26,874 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 46 [2022-11-26 00:03:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:03:26,874 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2022-11-26 00:03:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:03:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2022-11-26 00:03:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 00:03:26,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:03:26,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:03:26,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:03:27,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:27,082 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:03:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:03:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1177533864, now seen corresponding path program 1 times [2022-11-26 00:03:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:03:27,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110126900] [2022-11-26 00:03:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:03:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:03:29,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:03:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110126900] [2022-11-26 00:03:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110126900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:03:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341937734] [2022-11-26 00:03:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:03:29,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:03:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:03:29,893 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:03:29,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-26 00:03:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:03:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 00:03:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:03:30,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:03:30,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:30,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-11-26 00:03:30,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 00:03:30,944 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:03:30,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2022-11-26 00:03:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:03:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:03:31,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:03:31,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-26 00:03:31,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2022-11-26 00:03:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:03:31,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341937734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:03:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362058554] [2022-11-26 00:03:31,971 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:03:31,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:03:31,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:03:31,972 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:03:31,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:03:32,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:03:32,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:03:32,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:03:32,293 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:03:32,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:03:32,319 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:03:32,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:03:32,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:32,407 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:32,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:03:32,514 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:03:32,615 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:03:32,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:03:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:32,689 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:32,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:32,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:32,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:32,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:32,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:03:32,770 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:03:32,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:03:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:32,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:03:32,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:32,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:32,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:32,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:03:33,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:03:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,205 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:03:33,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:03:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,271 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:03:33,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-26 00:03:33,400 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:33,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:33,491 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:33,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:33,624 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:33,699 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:33,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:03:33,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:33,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:03:34,023 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:34,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:34,102 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:34,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:34,221 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:34,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:34,290 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:34,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:34,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:03:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:03:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:03:34,593 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:34,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:34,655 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:34,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:34,785 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:03:34,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:03:34,859 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:03:34,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:03:35,114 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:03:35,136 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:03:35,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:03:46,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18890#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-11-26 00:03:46,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:03:46,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:03:46,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 14] total 47 [2022-11-26 00:03:46,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847308629] [2022-11-26 00:03:46,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:03:46,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-26 00:03:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:03:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-26 00:03:46,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5775, Unknown=0, NotChecked=0, Total=6162 [2022-11-26 00:03:46,579 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:01,801 INFO L93 Difference]: Finished difference Result 205 states and 236 transitions. [2022-11-26 00:04:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 00:04:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-11-26 00:04:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:01,803 INFO L225 Difference]: With dead ends: 205 [2022-11-26 00:04:01,803 INFO L226 Difference]: Without dead ends: 205 [2022-11-26 00:04:01,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=911, Invalid=11521, Unknown=0, NotChecked=0, Total=12432 [2022-11-26 00:04:01,804 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 607 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:01,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 374 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:04:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-26 00:04:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-11-26 00:04:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 144 states have (on average 1.2430555555555556) internal successors, (179), 152 states have internal predecessors, (179), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:04:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-11-26 00:04:01,811 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 47 [2022-11-26 00:04:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-11-26 00:04:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-11-26 00:04:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:04:01,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:01,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:01,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-26 00:04:02,021 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:04:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807264, now seen corresponding path program 1 times [2022-11-26 00:04:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:02,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283576001] [2022-11-26 00:04:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:04:02,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283576001] [2022-11-26 00:04:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283576001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:02,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067151944] [2022-11-26 00:04:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:02,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:04:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:04:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:02,123 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-26 00:04:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:02,204 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2022-11-26 00:04:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:04:02,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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 48 [2022-11-26 00:04:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:02,206 INFO L225 Difference]: With dead ends: 158 [2022-11-26 00:04:02,206 INFO L226 Difference]: Without dead ends: 158 [2022-11-26 00:04:02,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:04:02,206 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:02,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:04:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-26 00:04:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-11-26 00:04:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 151 states have internal predecessors, (178), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:04:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2022-11-26 00:04:02,210 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 48 [2022-11-26 00:04:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:02,210 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2022-11-26 00:04:02,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-26 00:04:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2022-11-26 00:04:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:04:02,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:02,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:02,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-26 00:04:02,211 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:04:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807263, now seen corresponding path program 1 times [2022-11-26 00:04:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663662446] [2022-11-26 00:04:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:04:02,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663662446] [2022-11-26 00:04:02,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663662446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584600252] [2022-11-26 00:04:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:02,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:02,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:02,539 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:02,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 00:04:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:04:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:04:02,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:03,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:04:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:04:03,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584600252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716675617] [2022-11-26 00:04:03,081 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-26 00:04:03,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:04:03,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:04:03,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:04:03,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:04:03,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:04:03,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:04:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:04:03,481 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:04:03,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:04:03,508 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:04:03,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:04:03,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:03,610 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:03,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:03,706 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:03,786 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:04:03,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:04:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:03,866 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:03,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:03,906 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:03,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:03,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:03,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:03,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:04,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:04:04,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:04,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:04:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,342 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:04:04,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:04:04,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,412 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:04:04,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 76 [2022-11-26 00:04:04,550 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:04,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:04,618 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:04,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:04,728 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:04,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:04,795 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:04,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:04:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:04,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:04:05,096 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:05,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:05,173 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:05,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:05,284 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:05,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:05,353 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:05,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:05,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:04:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:05,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:04:05,649 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:05,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:05,709 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:05,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:05,836 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:04:05,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:04:05,900 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:04:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:04:06,176 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:04:06,203 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:04:06,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:04:15,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19974#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|) (select |#length| |ULTIMATE.start_check_~a0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-11-26 00:04:15,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:04:15,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:04:15,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-26 00:04:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147333819] [2022-11-26 00:04:15,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:04:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:04:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:04:15,931 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-26 00:04:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:16,320 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-11-26 00:04:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:04:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-26 00:04:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:16,322 INFO L225 Difference]: With dead ends: 165 [2022-11-26 00:04:16,322 INFO L226 Difference]: Without dead ends: 165 [2022-11-26 00:04:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:04:16,323 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 182 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 139 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-26 00:04:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-26 00:04:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 154 states have internal predecessors, (181), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:04:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2022-11-26 00:04:16,327 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 48 [2022-11-26 00:04:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:16,327 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2022-11-26 00:04:16,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-26 00:04:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2022-11-26 00:04:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:04:16,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:16,328 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:16,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-26 00:04:16,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-26 00:04:16,533 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:04:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1502172590, now seen corresponding path program 3 times [2022-11-26 00:04:16,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:16,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592097030] [2022-11-26 00:04:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:16,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:04:16,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592097030] [2022-11-26 00:04:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592097030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316586064] [2022-11-26 00:04:16,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:04:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:16,766 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:04:16,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:04:16,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:04:16,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:04:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:04:17,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:04:17,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316586064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:17,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654277533] [2022-11-26 00:04:17,231 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:04:17,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:04:17,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:04:17,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:04:17,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:04:17,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:04:17,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:04:17,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:04:17,660 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:04:17,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:04:17,691 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:04:17,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:04:17,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:17,787 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:17,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:17,870 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:17,951 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:04:17,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:04:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:18,024 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:18,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:18,075 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:18,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:18,111 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:18,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:18,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:18,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:18,359 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:04:18,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:04:18,493 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:04:18,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:04:18,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:04:22,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20660#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:04:22,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:04:22,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:04:22,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-11-26 00:04:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504622382] [2022-11-26 00:04:22,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:04:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:04:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:04:22,363 INFO L87 Difference]: Start difference. First operand 161 states and 189 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:22,803 INFO L93 Difference]: Finished difference Result 276 states and 318 transitions. [2022-11-26 00:04:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:04:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-26 00:04:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:22,805 INFO L225 Difference]: With dead ends: 276 [2022-11-26 00:04:22,805 INFO L226 Difference]: Without dead ends: 276 [2022-11-26 00:04:22,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:04:22,805 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 503 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:22,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 417 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-26 00:04:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2022-11-26 00:04:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 164 states have internal predecessors, (194), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:04:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2022-11-26 00:04:22,810 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 50 [2022-11-26 00:04:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:22,810 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2022-11-26 00:04:22,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2022-11-26 00:04:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:04:22,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:22,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:22,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:23,017 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:04:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash -336926923, now seen corresponding path program 4 times [2022-11-26 00:04:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:23,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585179037] [2022-11-26 00:04:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:04:23,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585179037] [2022-11-26 00:04:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585179037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312504170] [2022-11-26 00:04:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:04:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:23,235 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:23,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-26 00:04:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:04:23,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:04:23,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:04:23,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312504170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222083372] [2022-11-26 00:04:23,616 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:04:23,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:04:23,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:04:23,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:04:23,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:04:23,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:04:23,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:04:23,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:04:24,030 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:04:24,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:04:24,055 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:04:24,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:04:24,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:24,146 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:24,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:04:24,223 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:04:24,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:04:24,352 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:04:24,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-26 00:04:24,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:24,434 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:24,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:24,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:24,467 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:04:24,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:04:24,705 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:04:24,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 282 treesize of output 303 [2022-11-26 00:04:24,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:24,982 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:04:24,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:04:25,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:04:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,091 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:04:25,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-11-26 00:04:25,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,207 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:04:25,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:04:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,325 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:04:25,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 273 treesize of output 306 [2022-11-26 00:04:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:04:25,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:04:25,720 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:04:25,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:04:25,743 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:04:29,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21471#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:04:29,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:04:29,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:04:29,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2022-11-26 00:04:29,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470324213] [2022-11-26 00:04:29,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:04:29,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:04:29,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:04:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:04:29,538 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:30,015 INFO L93 Difference]: Finished difference Result 268 states and 309 transitions. [2022-11-26 00:04:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:04:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-11-26 00:04:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:30,018 INFO L225 Difference]: With dead ends: 268 [2022-11-26 00:04:30,018 INFO L226 Difference]: Without dead ends: 268 [2022-11-26 00:04:30,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:04:30,018 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 354 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:30,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-26 00:04:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 168. [2022-11-26 00:04:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 154 states have (on average 1.2272727272727273) internal successors, (189), 161 states have internal predecessors, (189), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:04:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-11-26 00:04:30,023 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 52 [2022-11-26 00:04:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:30,023 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-11-26 00:04:30,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-11-26 00:04:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:04:30,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:30,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:30,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:30,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:30,225 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:04:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:30,226 INFO L85 PathProgramCache]: Analyzing trace with hash 99439032, now seen corresponding path program 1 times [2022-11-26 00:04:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:30,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44458520] [2022-11-26 00:04:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:33,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44458520] [2022-11-26 00:04:33,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44458520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620380587] [2022-11-26 00:04:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:33,926 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-26 00:04:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-26 00:04:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:34,085 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:04:34,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:04:34,235 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:04:34,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:04:34,294 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1051 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_1051) |c_#memory_int|)) is different from true [2022-11-26 00:04:34,301 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2022-11-26 00:04:34,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:04:34,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-11-26 00:04:34,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:04:34,647 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-26 00:04:34,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-26 00:04:35,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:04:35,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-11-26 00:04:36,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-11-26 00:04:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2022-11-26 00:04:42,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 123 [2022-11-26 00:04:42,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2022-11-26 00:04:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-26 00:04:42,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:06,925 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_1054)))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (or (let ((.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse3)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (not (= .cse4 0)) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ |c_ULTIMATE.start_main_~i~1#1| 1))))))) is different from false [2022-11-26 00:07:09,008 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) |c_ULTIMATE.start_main_#t~mem18#1|) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse0 0)) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (let ((.cse4 (+ .cse0 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse4) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse4)) (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-11-26 00:07:11,109 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse2 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (+ .cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (not (= .cse4 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-11-26 00:07:27,872 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (v_ArrVal_1066 (Array Int Int)) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_1066 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1066) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse3 (store (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse3 .cse4))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (not (= .cse0 0)) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (let ((.cse1 (+ .cse0 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 .cse1) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (not (<= 1 |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-11-26 00:07:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620380587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294936995] [2022-11-26 00:07:27,879 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-26 00:07:27,879 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:27,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:27,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:27,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:28,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:07:28,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:07:28,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:07:28,289 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:07:28,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:07:28,323 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:07:28,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:07:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:07:28,446 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:07:28,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:07:28,550 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:07:28,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:07:28,706 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:07:28,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-26 00:07:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:28,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:07:28,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:07:28,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:28,842 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:07:28,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:07:29,219 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:07:29,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 282 treesize of output 303 [2022-11-26 00:07:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,530 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:07:29,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:07:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,623 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:07:29,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 273 treesize of output 306 [2022-11-26 00:07:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:29,860 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:07:29,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:07:29,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:29,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:29,972 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:07:29,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-11-26 00:07:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:07:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:07:30,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:07:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,455 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:07:30,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:07:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:30,525 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-26 00:07:30,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-11-26 00:07:30,687 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:30,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:30,764 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:30,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:30,903 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:30,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:30,974 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:30,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:31,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:07:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:31,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:07:31,308 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:07:31,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 133 [2022-11-26 00:07:31,385 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:07:31,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 150 [2022-11-26 00:07:31,557 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:31,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:31,633 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:31,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:31,744 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:31,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:31,814 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:31,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:32,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:07:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:32,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:07:32,253 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:07:32,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 147 [2022-11-26 00:07:32,322 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:07:32,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 164 [2022-11-26 00:07:32,501 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:32,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:32,577 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:32,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:32,704 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:07:32,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:07:32,797 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:07:32,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:07:33,584 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:07:33,605 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:07:33,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:55,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22296#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:55,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:55,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:07:55,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 60 [2022-11-26 00:07:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965638971] [2022-11-26 00:07:55,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-26 00:07:55,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-26 00:07:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=12465, Unknown=54, NotChecked=1150, Total=14280 [2022-11-26 00:07:55,072 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:08:04,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:08:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:17,196 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2022-11-26 00:08:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:08:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-11-26 00:08:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:17,198 INFO L225 Difference]: With dead ends: 198 [2022-11-26 00:08:17,198 INFO L226 Difference]: Without dead ends: 198 [2022-11-26 00:08:17,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7197 ImplicationChecksByTransitivity, 211.3s TimeCoverageRelationStatistics Valid=1733, Invalid=22725, Unknown=54, NotChecked=1570, Total=26082 [2022-11-26 00:08:17,200 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 682 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:17,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 549 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2225 Invalid, 1 Unknown, 88 Unchecked, 5.4s Time] [2022-11-26 00:08:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-26 00:08:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2022-11-26 00:08:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 150 states have (on average 1.22) internal successors, (183), 157 states have internal predecessors, (183), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:08:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2022-11-26 00:08:17,204 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 52 [2022-11-26 00:08:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:17,205 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2022-11-26 00:08:17,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:08:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2022-11-26 00:08:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:08:17,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:17,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:17,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-26 00:08:17,415 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:08:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash 355882978, now seen corresponding path program 2 times [2022-11-26 00:08:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:17,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180806053] [2022-11-26 00:08:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:17,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 00:08:17,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180806053] [2022-11-26 00:08:17,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180806053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802531633] [2022-11-26 00:08:17,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:08:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:17,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:17,521 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:17,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:08:17,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:08:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:08:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:08:17,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:08:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802531633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379313275] [2022-11-26 00:08:17,925 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-26 00:08:17,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:17,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:17,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:17,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:18,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:08:18,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:08:18,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:08:18,375 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:08:18,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:08:18,407 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:08:18,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:08:18,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:18,505 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:18,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:18,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:18,688 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:08:18,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:08:18,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:18,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:18,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,829 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:18,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:18,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:18,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:19,113 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:08:19,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:08:19,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:08:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,320 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:08:19,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:08:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,391 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:08:19,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-26 00:08:19,527 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:19,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:19,600 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:19,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:19,727 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:19,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:19,793 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:19,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:19,993 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:08:20,016 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:08:20,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:26,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23107#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:26,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:26,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:26,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-26 00:08:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968419466] [2022-11-26 00:08:26,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:08:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:08:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:08:26,645 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:08:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:27,192 INFO L93 Difference]: Finished difference Result 186 states and 210 transitions. [2022-11-26 00:08:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:08:27,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-26 00:08:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:27,194 INFO L225 Difference]: With dead ends: 186 [2022-11-26 00:08:27,194 INFO L226 Difference]: Without dead ends: 186 [2022-11-26 00:08:27,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=318, Invalid=2762, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:08:27,195 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:27,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 295 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:08:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-26 00:08:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2022-11-26 00:08:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:08:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2022-11-26 00:08:27,199 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 53 [2022-11-26 00:08:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:27,200 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2022-11-26 00:08:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:08:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2022-11-26 00:08:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:08:27,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:27,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:27,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-26 00:08:27,408 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:08:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1135186504, now seen corresponding path program 1 times [2022-11-26 00:08:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:27,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401855860] [2022-11-26 00:08:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:08:27,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401855860] [2022-11-26 00:08:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401855860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803923133] [2022-11-26 00:08:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:27,634 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:27,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-26 00:08:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:08:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:08:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:08:28,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803923133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500840330] [2022-11-26 00:08:28,030 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-26 00:08:28,030 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:28,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:28,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:28,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:28,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:08:28,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:08:28,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:08:28,443 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:08:28,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:08:28,472 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:08:28,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:08:28,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:28,562 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:28,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:28,645 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:28,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:08:28,781 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:08:28,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-11-26 00:08:28,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:28,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:28,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:28,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:28,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:29,290 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:08:29,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 282 treesize of output 303 [2022-11-26 00:08:29,444 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:29,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,519 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:08:29,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:08:29,558 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:29,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,631 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:08:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:08:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:29,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:08:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,018 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:08:30,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:08:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,086 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:08:30,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 76 [2022-11-26 00:08:30,274 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:30,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:30,364 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:30,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:30,508 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:30,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:30,599 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:30,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:08:30,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:08:30,875 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:08:30,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 133 [2022-11-26 00:08:30,947 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:08:30,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 150 [2022-11-26 00:08:31,153 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:31,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:31,226 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:31,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:31,345 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:31,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:31,425 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:31,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:08:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:08:31,919 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:08:31,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 133 [2022-11-26 00:08:31,989 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:08:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 150 [2022-11-26 00:08:32,157 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:32,223 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:32,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:32,354 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:08:32,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:08:32,426 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:08:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:08:32,976 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:08:32,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:08:33,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:45,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23845#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:45,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:45,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:45,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-11-26 00:08:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729538405] [2022-11-26 00:08:45,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:08:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:08:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:08:45,698 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:08:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:45,917 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2022-11-26 00:08:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:08:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-26 00:08:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:45,919 INFO L225 Difference]: With dead ends: 170 [2022-11-26 00:08:45,919 INFO L226 Difference]: Without dead ends: 170 [2022-11-26 00:08:45,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:08:45,920 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:45,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 269 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:08:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-26 00:08:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-11-26 00:08:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 153 states have (on average 1.196078431372549) internal successors, (183), 160 states have internal predecessors, (183), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:08:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2022-11-26 00:08:45,924 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 55 [2022-11-26 00:08:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:45,924 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2022-11-26 00:08:45,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:08:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2022-11-26 00:08:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:08:45,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:45,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:45,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-26 00:08:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-26 00:08:46,137 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:08:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 616278162, now seen corresponding path program 5 times [2022-11-26 00:08:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:46,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659961851] [2022-11-26 00:08:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:08:46,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659961851] [2022-11-26 00:08:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659961851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:46,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828812326] [2022-11-26 00:08:46,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:08:46,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:46,293 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:46,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-26 00:08:46,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:08:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:08:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:46,760 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:08:47,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 00:08:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-26 00:08:47,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 00:08:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828812326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167213222] [2022-11-26 00:08:48,040 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:08:48,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:48,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:48,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:48,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:48,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:08:48,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:08:48,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:08:48,354 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:08:48,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:08:48,382 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:08:48,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:08:48,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:48,467 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:48,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:08:48,547 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:08:48,626 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:08:48,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:08:48,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:48,692 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:48,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:48,725 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:08:48,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:08:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:48,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:08:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:48,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:48,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:48,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:08:49,053 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:08:49,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:08:49,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:56,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24588#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:56,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:56,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:56,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2022-11-26 00:08:56,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269069796] [2022-11-26 00:08:56,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:56,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:08:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:56,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:08:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2729, Unknown=2, NotChecked=0, Total=2970 [2022-11-26 00:08:56,578 INFO L87 Difference]: Start difference. First operand 167 states and 191 transitions. Second operand has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 00:08:59,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:01,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:02,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:05,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:07,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:09,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:11,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:13,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:16,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:18,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:20,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:22,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:24,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:26,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:28,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:09:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:30,181 INFO L93 Difference]: Finished difference Result 613 states and 687 transitions. [2022-11-26 00:09:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-26 00:09:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2022-11-26 00:09:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:30,184 INFO L225 Difference]: With dead ends: 613 [2022-11-26 00:09:30,184 INFO L226 Difference]: Without dead ends: 613 [2022-11-26 00:09:30,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1026, Invalid=8478, Unknown=2, NotChecked=0, Total=9506 [2022-11-26 00:09:30,186 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1458 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 57 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:30,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 579 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1654 Invalid, 16 Unknown, 0 Unchecked, 30.5s Time] [2022-11-26 00:09:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-26 00:09:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 229. [2022-11-26 00:09:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 216 states have internal predecessors, (248), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:09:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-11-26 00:09:30,192 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 56 [2022-11-26 00:09:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:30,192 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-11-26 00:09:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 00:09:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-11-26 00:09:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:09:30,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:30,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:30,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:30,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:30,399 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:09:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:30,400 INFO L85 PathProgramCache]: Analyzing trace with hash -830956881, now seen corresponding path program 1 times [2022-11-26 00:09:30,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:30,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4287565] [2022-11-26 00:09:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:30,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:09:30,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:30,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4287565] [2022-11-26 00:09:30,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4287565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:30,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:09:30,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:09:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249511192] [2022-11-26 00:09:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:09:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:09:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:30,475 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:09:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:30,546 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2022-11-26 00:09:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:09:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2022-11-26 00:09:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:30,549 INFO L225 Difference]: With dead ends: 228 [2022-11-26 00:09:30,549 INFO L226 Difference]: Without dead ends: 198 [2022-11-26 00:09:30,549 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:09:30,550 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:30,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-26 00:09:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-26 00:09:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.196629213483146) internal successors, (213), 185 states have internal predecessors, (213), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:09:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 233 transitions. [2022-11-26 00:09:30,555 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 233 transitions. Word has length 56 [2022-11-26 00:09:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:30,556 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 233 transitions. [2022-11-26 00:09:30,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:09:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 233 transitions. [2022-11-26 00:09:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 00:09:30,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:30,557 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-26 00:09:30,557 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:09:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -320252555, now seen corresponding path program 6 times [2022-11-26 00:09:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536931487] [2022-11-26 00:09:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:09:30,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:30,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536931487] [2022-11-26 00:09:30,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536931487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750232191] [2022-11-26 00:09:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:09:30,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:30,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:30,895 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:30,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:09:31,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:09:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:09:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:09:31,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:09:31,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750232191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676659941] [2022-11-26 00:09:31,444 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:09:31,445 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:31,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:31,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:31,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:31,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:09:31,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:09:31,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:09:31,808 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:09:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:09:31,837 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:09:31,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:09:31,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:31,968 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:32,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:32,054 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:32,157 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:09:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:09:32,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:32,226 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:32,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:32,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:32,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:32,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:32,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:32,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:32,644 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:09:32,670 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:09:32,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:37,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26337#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:37,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:37,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:09:37,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-11-26 00:09:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936659637] [2022-11-26 00:09:37,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:09:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:09:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:09:37,143 INFO L87 Difference]: Start difference. First operand 198 states and 233 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:09:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:37,816 INFO L93 Difference]: Finished difference Result 235 states and 272 transitions. [2022-11-26 00:09:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:09:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-11-26 00:09:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:37,818 INFO L225 Difference]: With dead ends: 235 [2022-11-26 00:09:37,818 INFO L226 Difference]: Without dead ends: 235 [2022-11-26 00:09:37,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:09:37,819 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 276 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:37,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 526 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:09:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-26 00:09:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 198. [2022-11-26 00:09:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.1853932584269662) internal successors, (211), 185 states have internal predecessors, (211), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:09:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 231 transitions. [2022-11-26 00:09:37,824 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 231 transitions. Word has length 58 [2022-11-26 00:09:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 231 transitions. [2022-11-26 00:09:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:09:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 231 transitions. [2022-11-26 00:09:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:09:37,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:37,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:37,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:38,032 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:09:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1905928531, now seen corresponding path program 3 times [2022-11-26 00:09:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264401288] [2022-11-26 00:09:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:38,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:09:38,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264401288] [2022-11-26 00:09:38,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264401288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555369310] [2022-11-26 00:09:38,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:09:38,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:38,403 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:38,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-26 00:09:38,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:09:38,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:09:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-26 00:09:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-26 00:09:39,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555369310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423336974] [2022-11-26 00:09:39,063 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-26 00:09:39,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:39,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:39,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:39,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:39,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:09:39,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:09:39,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:09:39,436 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:09:39,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:09:39,469 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:09:39,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:09:39,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:39,590 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:39,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:39,695 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:39,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:09:39,835 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:09:39,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-26 00:09:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:39,911 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:39,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:39,948 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:39,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:40,202 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:09:40,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:09:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,503 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:09:40,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:09:40,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,660 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:09:40,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-26 00:09:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:40,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,823 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:09:40,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-26 00:09:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:40,934 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:09:40,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:09:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:41,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:09:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,468 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:09:41,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:09:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:41,526 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:09:41,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-26 00:09:41,652 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:09:41,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:09:41,720 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:09:41,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:09:41,842 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:09:41,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:09:41,934 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:09:41,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:09:42,142 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:09:42,166 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:09:42,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:50,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27183#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:50,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:50,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:09:50,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2022-11-26 00:09:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883857141] [2022-11-26 00:09:50,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:09:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:09:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:09:50,169 INFO L87 Difference]: Start difference. First operand 198 states and 231 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:09:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:51,284 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-11-26 00:09:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:09:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2022-11-26 00:09:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:51,286 INFO L225 Difference]: With dead ends: 224 [2022-11-26 00:09:51,286 INFO L226 Difference]: Without dead ends: 224 [2022-11-26 00:09:51,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=453, Invalid=3837, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 00:09:51,291 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 292 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:51,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 237 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:09:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-26 00:09:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-11-26 00:09:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 182 states have (on average 1.1703296703296704) internal successors, (213), 186 states have internal predecessors, (213), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:09:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 233 transitions. [2022-11-26 00:09:51,300 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 233 transitions. Word has length 59 [2022-11-26 00:09:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:51,301 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 233 transitions. [2022-11-26 00:09:51,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:09:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 233 transitions. [2022-11-26 00:09:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:09:51,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:51,302 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:51,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:51,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:51,508 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:09:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2017565660, now seen corresponding path program 7 times [2022-11-26 00:09:51,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:51,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582647670] [2022-11-26 00:09:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-26 00:09:51,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:51,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582647670] [2022-11-26 00:09:51,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582647670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:51,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449142431] [2022-11-26 00:09:51,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:09:51,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:51,920 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:51,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-26 00:09:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:09:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-26 00:09:52,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-26 00:09:53,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449142431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:53,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660291950] [2022-11-26 00:09:53,498 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:09:53,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:53,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:53,499 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:53,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:09:53,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:09:53,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:09:53,848 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:09:53,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:09:53,876 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:09:53,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:09:53,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:53,964 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:54,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:09:54,073 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:09:54,156 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:09:54,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:09:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:54,236 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:54,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:54,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:09:54,320 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:09:54,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:09:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:54,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:09:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:54,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:09:54,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:09:54,703 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:09:54,725 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:09:54,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:59,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28063#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:59,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:59,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:09:59,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-11-26 00:09:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431808053] [2022-11-26 00:09:59,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:09:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:09:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:09:59,773 INFO L87 Difference]: Start difference. First operand 199 states and 233 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:10:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:05,434 INFO L93 Difference]: Finished difference Result 423 states and 486 transitions. [2022-11-26 00:10:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-26 00:10:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-11-26 00:10:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:05,435 INFO L225 Difference]: With dead ends: 423 [2022-11-26 00:10:05,435 INFO L226 Difference]: Without dead ends: 423 [2022-11-26 00:10:05,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1109, Invalid=9193, Unknown=0, NotChecked=0, Total=10302 [2022-11-26 00:10:05,436 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 700 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:05,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 375 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:10:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-26 00:10:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 249. [2022-11-26 00:10:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.1551724137931034) internal successors, (268), 235 states have internal predecessors, (268), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:10:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 288 transitions. [2022-11-26 00:10:05,442 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 288 transitions. Word has length 62 [2022-11-26 00:10:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:05,442 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 288 transitions. [2022-11-26 00:10:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:10:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 288 transitions. [2022-11-26 00:10:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:10:05,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:05,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:05,650 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:10:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash -799920217, now seen corresponding path program 8 times [2022-11-26 00:10:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:05,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752792401] [2022-11-26 00:10:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:10:05,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752792401] [2022-11-26 00:10:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752792401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:10:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703314809] [2022-11-26 00:10:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:10:05,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:05,970 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:05,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-26 00:10:06,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:10:06,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:10:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-26 00:10:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:06,608 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:10:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-26 00:10:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:13,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-11-26 00:10:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 00:10:14,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703314809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444025481] [2022-11-26 00:10:14,009 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:10:14,009 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:10:14,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:10:14,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:10:14,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:10:14,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:10:14,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:10:14,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:10:14,382 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:10:14,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:10:14,410 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:10:14,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:10:14,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:10:14,510 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:14,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:10:14,605 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:14,702 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:10:14,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:10:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:14,779 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:10:14,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:10:14,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:14,827 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:10:14,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:10:14,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:14,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:10:14,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:10:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:14,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 00:10:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:14,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:10:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:15,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:10:15,226 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:10:15,250 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:10:15,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:10:27,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29259#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:10:27,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:10:27,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:10:27,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-11-26 00:10:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381172952] [2022-11-26 00:10:27,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:10:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:10:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:10:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=3740, Unknown=4, NotChecked=0, Total=4032 [2022-11-26 00:10:27,396 INFO L87 Difference]: Start difference. First operand 249 states and 288 transitions. Second operand has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 00:10:34,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:36,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:41,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:43,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:46,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:48,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:51,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:10:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:54,006 INFO L93 Difference]: Finished difference Result 286 states and 326 transitions. [2022-11-26 00:10:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-26 00:10:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 62 [2022-11-26 00:10:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:54,007 INFO L225 Difference]: With dead ends: 286 [2022-11-26 00:10:54,007 INFO L226 Difference]: Without dead ends: 263 [2022-11-26 00:10:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1064, Invalid=10704, Unknown=4, NotChecked=0, Total=11772 [2022-11-26 00:10:54,008 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 302 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 34 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:54,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 455 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1963 Invalid, 6 Unknown, 0 Unchecked, 17.5s Time] [2022-11-26 00:10:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-26 00:10:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 219. [2022-11-26 00:10:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1359223300970873) internal successors, (234), 209 states have internal predecessors, (234), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:10:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-11-26 00:10:54,014 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 62 [2022-11-26 00:10:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:54,014 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-11-26 00:10:54,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 00:10:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-11-26 00:10:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:10:54,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:54,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:54,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:54,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-26 00:10:54,223 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:10:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:54,223 INFO L85 PathProgramCache]: Analyzing trace with hash 251843626, now seen corresponding path program 2 times [2022-11-26 00:10:54,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:54,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218145460] [2022-11-26 00:10:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:10:54,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:54,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218145460] [2022-11-26 00:10:54,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218145460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:10:54,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115298640] [2022-11-26 00:10:54,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:10:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:54,626 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:54,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:10:54,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:10:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:10:54,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-26 00:10:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:55,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:10:55,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:10:55,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2022-11-26 00:10:55,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:10:55,804 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-26 00:10:55,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-11-26 00:10:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 00:10:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:56,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:10:56,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-26 00:10:56,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-11-26 00:10:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 00:10:57,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115298640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581607832] [2022-11-26 00:10:57,003 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:10:57,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:10:57,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:10:57,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:10:57,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:10:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:10:57,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:10:57,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:10:57,302 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:10:57,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:10:57,353 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:10:57,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:10:57,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:10:57,445 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:57,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:10:57,530 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:10:57,663 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:10:57,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-26 00:10:57,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:57,747 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:10:57,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:10:57,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:57,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:10:57,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:10:58,013 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-26 00:10:58,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 280 treesize of output 301 [2022-11-26 00:10:58,151 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:58,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,213 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:10:58,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-26 00:10:58,257 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:10:58,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:10:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,336 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:10:58,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-26 00:10:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:10:58,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:10:58,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:10:58,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,755 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:10:58,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:10:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:58,822 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:10:58,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-26 00:10:58,972 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:10:58,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:10:59,067 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:10:59,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:10:59,192 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:10:59,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:10:59,274 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:10:59,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:10:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:59,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:10:59,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:59,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:10:59,564 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:10:59,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 147 [2022-11-26 00:10:59,661 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:10:59,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 164 [2022-11-26 00:10:59,832 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:10:59,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:10:59,903 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:10:59,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:00,025 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:00,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:00,109 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:00,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:00,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:11:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:00,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:11:00,546 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:11:00,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 133 [2022-11-26 00:11:00,618 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:11:00,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 150 [2022-11-26 00:11:00,798 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:00,868 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:00,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:01,000 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:01,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:01,082 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:01,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:01,321 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:11:01,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:11:01,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:11:13,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30292#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:11:13,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:11:13,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:11:13,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2022-11-26 00:11:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354468453] [2022-11-26 00:11:13,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:11:13,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:11:13,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:11:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4623, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:11:13,703 INFO L87 Difference]: Start difference. First operand 219 states and 248 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:15,721 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-11-26 00:11:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:11:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2022-11-26 00:11:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:15,723 INFO L225 Difference]: With dead ends: 227 [2022-11-26 00:11:15,723 INFO L226 Difference]: Without dead ends: 227 [2022-11-26 00:11:15,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=672, Invalid=6468, Unknown=0, NotChecked=0, Total=7140 [2022-11-26 00:11:15,724 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 330 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:15,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 347 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:11:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-26 00:11:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2022-11-26 00:11:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1359223300970873) internal successors, (234), 209 states have internal predecessors, (234), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:11:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-11-26 00:11:15,729 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 64 [2022-11-26 00:11:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:15,729 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-11-26 00:11:15,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-11-26 00:11:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:11:15,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:15,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:15,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-26 00:11:15,938 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:11:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -783206004, now seen corresponding path program 3 times [2022-11-26 00:11:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:15,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435477959] [2022-11-26 00:11:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:11:16,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435477959] [2022-11-26 00:11:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435477959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872837249] [2022-11-26 00:11:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:11:16,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:16,223 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:16,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-26 00:11:16,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:11:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:11:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:11:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:11:17,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872837249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750666797] [2022-11-26 00:11:17,058 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:11:17,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:11:17,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:11:17,058 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:11:17,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:11:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:11:17,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:11:17,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:11:17,401 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:11:17,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:11:17,431 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:11:17,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:11:17,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:11:17,521 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:11:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:11:17,605 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:11:17,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:11:17,753 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:11:17,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-11-26 00:11:17,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:17,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:11:17,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:11:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:17,870 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:11:17,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:11:18,127 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-26 00:11:18,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 304 [2022-11-26 00:11:18,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,415 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:18,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-26 00:11:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,584 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:18,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 274 treesize of output 307 [2022-11-26 00:11:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,756 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:18,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 295 [2022-11-26 00:11:18,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:18,893 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:18,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-26 00:11:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:11:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:11:19,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:11:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,315 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-26 00:11:19,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-26 00:11:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,395 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-26 00:11:19,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 78 [2022-11-26 00:11:19,535 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:19,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:19,621 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:19,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:19,770 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:19,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:19,855 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:19,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:19,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:11:20,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:20,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:11:20,202 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:11:20,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 147 [2022-11-26 00:11:20,275 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:11:20,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 164 [2022-11-26 00:11:20,449 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:20,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:20,520 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:20,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:20,635 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:20,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:20,710 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:20,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-26 00:11:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:21,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-26 00:11:21,153 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-26 00:11:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 147 [2022-11-26 00:11:21,243 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-26 00:11:21,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 164 [2022-11-26 00:11:21,418 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:21,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:21,492 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:21,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:21,622 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-26 00:11:21,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-26 00:11:21,693 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-26 00:11:21,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-26 00:11:21,924 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:11:21,946 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:11:21,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:11:33,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31214#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:11:33,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:11:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:11:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2022-11-26 00:11:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927674617] [2022-11-26 00:11:33,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:11:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:11:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:11:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:11:33,242 INFO L87 Difference]: Start difference. First operand 219 states and 248 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:34,043 INFO L93 Difference]: Finished difference Result 284 states and 321 transitions. [2022-11-26 00:11:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:11:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2022-11-26 00:11:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:34,045 INFO L225 Difference]: With dead ends: 284 [2022-11-26 00:11:34,045 INFO L226 Difference]: Without dead ends: 284 [2022-11-26 00:11:34,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=578, Invalid=4972, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:11:34,045 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 562 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:34,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 263 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:11:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-26 00:11:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 255. [2022-11-26 00:11:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 242 states have (on average 1.1446280991735538) internal successors, (277), 245 states have internal predecessors, (277), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:11:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 291 transitions. [2022-11-26 00:11:34,053 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 291 transitions. Word has length 66 [2022-11-26 00:11:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:34,053 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 291 transitions. [2022-11-26 00:11:34,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 291 transitions. [2022-11-26 00:11:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:11:34,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:34,055 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:34,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:34,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:34,261 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:11:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash 609315428, now seen corresponding path program 9 times [2022-11-26 00:11:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250788907] [2022-11-26 00:11:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 59 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:11:34,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250788907] [2022-11-26 00:11:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250788907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570427857] [2022-11-26 00:11:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:11:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:34,649 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:34,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-26 00:11:34,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:11:34,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:11:34,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 94 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:11:35,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 94 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:11:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570427857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432794757] [2022-11-26 00:11:35,462 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:11:35,462 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:11:35,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:11:35,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:11:35,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:11:35,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:11:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:11:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:11:35,741 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:11:35,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:11:35,783 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:11:35,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:11:35,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:11:35,892 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:11:35,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:11:35,999 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:11:36,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:11:36,137 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:11:36,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-26 00:11:36,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:36,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:11:36,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:11:36,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:36,248 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:11:36,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:11:36,529 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-26 00:11:36,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-26 00:11:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:36,876 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:36,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-26 00:11:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,003 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:37,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-26 00:11:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,174 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:37,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-26 00:11:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:11:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,310 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 00:11:37,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-26 00:11:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:11:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:11:37,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:11:37,653 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:11:37,675 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:11:37,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:11:43,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32252#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:11:43,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:11:43,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:11:43,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2022-11-26 00:11:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170570651] [2022-11-26 00:11:43,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:11:43,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:11:43,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:11:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:11:43,076 INFO L87 Difference]: Start difference. First operand 255 states and 291 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:43,854 INFO L93 Difference]: Finished difference Result 299 states and 338 transitions. [2022-11-26 00:11:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:11:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-11-26 00:11:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:43,856 INFO L225 Difference]: With dead ends: 299 [2022-11-26 00:11:43,857 INFO L226 Difference]: Without dead ends: 299 [2022-11-26 00:11:43,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 163 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=503, Invalid=3403, Unknown=0, NotChecked=0, Total=3906 [2022-11-26 00:11:43,857 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 310 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:43,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 380 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:11:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-26 00:11:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 255. [2022-11-26 00:11:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 242 states have (on average 1.140495867768595) internal successors, (276), 245 states have internal predecessors, (276), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:11:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 290 transitions. [2022-11-26 00:11:43,864 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 290 transitions. Word has length 68 [2022-11-26 00:11:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:43,864 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 290 transitions. [2022-11-26 00:11:43,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:11:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 290 transitions. [2022-11-26 00:11:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:11:43,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:43,866 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:43,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:44,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-26 00:11:44,072 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-26 00:11:44,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1626730518, now seen corresponding path program 10 times [2022-11-26 00:11:44,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:44,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736861245] [2022-11-26 00:11:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:44,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 57 proven. 69 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:11:44,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736861245] [2022-11-26 00:11:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736861245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127845256] [2022-11-26 00:11:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:11:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:44,657 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:44,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421f72be-7849-413f-ad5a-4d2e206048e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-26 00:11:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:11:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates...