./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh --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 b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 --- 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-2329fc7 [2022-12-14 08:56:09,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:56:09,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:56:09,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:56:09,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:56:09,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:56:09,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:56:09,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:56:09,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:56:09,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:56:09,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:56:09,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:56:09,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:56:09,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:56:09,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:56:09,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:56:09,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:56:09,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:56:09,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:56:09,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:56:09,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:56:09,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:56:09,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:56:09,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:56:09,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:56:09,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:56:09,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:56:09,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:56:09,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:56:09,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:56:09,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:56:09,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:56:09,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:56:09,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:56:09,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:56:09,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:56:09,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:56:09,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:56:09,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:56:09,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:56:09,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:56:09,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:56:09,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:56:09,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:56:09,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:56:09,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:56:09,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:56:09,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:56:09,395 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:56:09,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:56:09,395 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:56:09,395 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:56:09,395 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:56:09,395 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:56:09,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:56:09,396 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:56:09,396 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:56:09,396 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:56:09,396 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:56:09,396 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:56:09,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:56:09,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:56:09,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:56:09,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:56:09,399 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:56:09,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:56:09,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:56:09,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:56:09,399 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:56:09,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:56:09,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:56:09,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:09,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:56:09,400 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:56:09,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:56:09,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:56:09,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:56:09,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:56:09,401 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_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 [2022-12-14 08:56:09,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:56:09,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:56:09,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:56:09,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:56:09,631 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:56:09,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2022-12-14 08:56:12,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:56:12,398 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:56:12,399 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2022-12-14 08:56:12,407 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/d804b651e/0b323b397cbe475f9b8d43967b5b8c6d/FLAG20504e46b [2022-12-14 08:56:12,418 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/d804b651e/0b323b397cbe475f9b8d43967b5b8c6d [2022-12-14 08:56:12,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:56:12,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:56:12,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:12,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:56:12,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:56:12,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6199250d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12, skipping insertion in model container [2022-12-14 08:56:12,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:56:12,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:56:12,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:12,636 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:56:12,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:12,681 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:56:12,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12 WrapperNode [2022-12-14 08:56:12,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:12,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:12,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:56:12,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:56:12,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,710 INFO L138 Inliner]: procedures = 126, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-12-14 08:56:12,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:12,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:56:12,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:56:12,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:56:12,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,729 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:56:12,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:56:12,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:56:12,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:56:12,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (1/1) ... [2022-12-14 08:56:12,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:56:12,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:56:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:56:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:56:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:56:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:56:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:56:12,874 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:56:12,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:56:13,117 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:56:13,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:56:13,145 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:56:13,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:13 BoogieIcfgContainer [2022-12-14 08:56:13,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:56:13,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:56:13,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:56:13,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:56:13,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:56:12" (1/3) ... [2022-12-14 08:56:13,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10041aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:13, skipping insertion in model container [2022-12-14 08:56:13,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:12" (2/3) ... [2022-12-14 08:56:13,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10041aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:13, skipping insertion in model container [2022-12-14 08:56:13,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:13" (3/3) ... [2022-12-14 08:56:13,153 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2022-12-14 08:56:13,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:56:13,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-14 08:56:13,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:56:13,203 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;@4fbb6430, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:56:13,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2022-12-14 08:56:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:56:13,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:13,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:56:13,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 160681, now seen corresponding path program 1 times [2022-12-14 08:56:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595560617] [2022-12-14 08:56:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:13,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595560617] [2022-12-14 08:56:13,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595560617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:13,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:13,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081428496] [2022-12-14 08:56:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:13,458 INFO L87 Difference]: Start difference. First operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:13,594 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-12-14 08:56:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:56:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:56:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:13,601 INFO L225 Difference]: With dead ends: 101 [2022-12-14 08:56:13,602 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 08:56:13,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:13,605 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:13,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 48 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 08:56:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2022-12-14 08:56:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-12-14 08:56:13,637 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 3 [2022-12-14 08:56:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:13,637 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-12-14 08:56:13,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-12-14 08:56:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:56:13,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:13,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:56:13,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:56:13,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 160682, now seen corresponding path program 1 times [2022-12-14 08:56:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:13,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724883803] [2022-12-14 08:56:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:13,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724883803] [2022-12-14 08:56:13,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724883803] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:13,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:13,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:13,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052167188] [2022-12-14 08:56:13,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:13,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:13,756 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:13,877 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-12-14 08:56:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:56:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:56:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:13,879 INFO L225 Difference]: With dead ends: 93 [2022-12-14 08:56:13,879 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 08:56:13,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:13,880 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 33 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 08:56:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-12-14 08:56:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 2.073170731707317) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-12-14 08:56:13,884 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 3 [2022-12-14 08:56:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:13,885 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-12-14 08:56:13,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-12-14 08:56:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:56:13,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:13,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:56:13,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:56:13,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash 4981091, now seen corresponding path program 1 times [2022-12-14 08:56:13,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:13,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194400754] [2022-12-14 08:56:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:13,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:13,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:13,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194400754] [2022-12-14 08:56:13,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194400754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:13,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:13,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978571633] [2022-12-14 08:56:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:13,917 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:13,980 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-12-14 08:56:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:56:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:13,981 INFO L225 Difference]: With dead ends: 89 [2022-12-14 08:56:13,981 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 08:56:13,981 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 [2022-12-14 08:56:13,983 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:13,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 08:56:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-12-14 08:56:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.975609756097561) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-12-14 08:56:13,987 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 4 [2022-12-14 08:56:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:13,987 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-12-14 08:56:13,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-12-14 08:56:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:56:13,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:13,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:56:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:56:13,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 4981092, now seen corresponding path program 1 times [2022-12-14 08:56:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313064674] [2022-12-14 08:56:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:14,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313064674] [2022-12-14 08:56:14,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313064674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:14,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:14,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826265819] [2022-12-14 08:56:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:14,034 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:14,075 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-12-14 08:56:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:56:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:14,076 INFO L225 Difference]: With dead ends: 69 [2022-12-14 08:56:14,076 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 08:56:14,076 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 [2022-12-14 08:56:14,077 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:14,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 08:56:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-12-14 08:56:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-12-14 08:56:14,082 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 4 [2022-12-14 08:56:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:14,083 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-12-14 08:56:14,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-12-14 08:56:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:56:14,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:14,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:56:14,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 341578850, now seen corresponding path program 1 times [2022-12-14 08:56:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:14,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754210541] [2022-12-14 08:56:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:14,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754210541] [2022-12-14 08:56:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754210541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:14,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:14,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:56:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906483829] [2022-12-14 08:56:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:56:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:56:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:56:14,272 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:14,406 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-12-14 08:56:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:56:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 08:56:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:14,407 INFO L225 Difference]: With dead ends: 76 [2022-12-14 08:56:14,407 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 08:56:14,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:56:14,408 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:14,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 278 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 08:56:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-12-14 08:56:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-12-14 08:56:14,412 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 8 [2022-12-14 08:56:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:14,412 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-12-14 08:56:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-12-14 08:56:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:56:14,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:14,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:56:14,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1279779499, now seen corresponding path program 1 times [2022-12-14 08:56:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:14,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44727974] [2022-12-14 08:56:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:14,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:14,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44727974] [2022-12-14 08:56:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44727974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:14,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:56:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17279881] [2022-12-14 08:56:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:14,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:14,473 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:14,505 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-12-14 08:56:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:56:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 08:56:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:14,506 INFO L225 Difference]: With dead ends: 55 [2022-12-14 08:56:14,506 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 08:56:14,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:14,507 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:14,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 84 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 08:56:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-12-14 08:56:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-12-14 08:56:14,512 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 12 [2022-12-14 08:56:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:14,512 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-12-14 08:56:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-12-14 08:56:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:56:14,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:14,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:14,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:56:14,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1017195350, now seen corresponding path program 1 times [2022-12-14 08:56:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338675404] [2022-12-14 08:56:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:14,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338675404] [2022-12-14 08:56:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338675404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:14,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:14,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:56:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246237266] [2022-12-14 08:56:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:14,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:14,655 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:14,739 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-12-14 08:56:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:56:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 08:56:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:14,740 INFO L225 Difference]: With dead ends: 52 [2022-12-14 08:56:14,740 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 08:56:14,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:56:14,740 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 52 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 08:56:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 08:56:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-12-14 08:56:14,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 13 [2022-12-14 08:56:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:14,744 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-12-14 08:56:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-12-14 08:56:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:56:14,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:14,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:56:14,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1017195351, now seen corresponding path program 1 times [2022-12-14 08:56:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992813856] [2022-12-14 08:56:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:14,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:14,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992813856] [2022-12-14 08:56:14,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992813856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:14,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:14,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:56:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903682252] [2022-12-14 08:56:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:14,926 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:15,016 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-12-14 08:56:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:56:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 08:56:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:15,017 INFO L225 Difference]: With dead ends: 51 [2022-12-14 08:56:15,017 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 08:56:15,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:56:15,017 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:15,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 56 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 08:56:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 08:56:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-12-14 08:56:15,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 13 [2022-12-14 08:56:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:15,020 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-12-14 08:56:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-12-14 08:56:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:56:15,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:15,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:56:15,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1727753933, now seen corresponding path program 1 times [2022-12-14 08:56:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:15,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219982480] [2022-12-14 08:56:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:15,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:15,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219982480] [2022-12-14 08:56:15,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219982480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:15,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:15,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375959426] [2022-12-14 08:56:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:56:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:56:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:15,094 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:15,153 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-12-14 08:56:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:56:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 08:56:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:15,154 INFO L225 Difference]: With dead ends: 50 [2022-12-14 08:56:15,154 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 08:56:15,154 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 [2022-12-14 08:56:15,155 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:15,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 55 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 08:56:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 08:56:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-12-14 08:56:15,159 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 15 [2022-12-14 08:56:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:15,159 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-12-14 08:56:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-12-14 08:56:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:56:15,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:15,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:15,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:56:15,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2020764258, now seen corresponding path program 1 times [2022-12-14 08:56:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086650573] [2022-12-14 08:56:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:15,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086650573] [2022-12-14 08:56:15,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086650573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:15,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:15,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:15,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788690998] [2022-12-14 08:56:15,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:56:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:56:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:15,288 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:15,358 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-12-14 08:56:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:56:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:56:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:15,359 INFO L225 Difference]: With dead ends: 49 [2022-12-14 08:56:15,359 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 08:56:15,359 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 [2022-12-14 08:56:15,360 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 08:56:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 08:56:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.5) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-12-14 08:56:15,362 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 16 [2022-12-14 08:56:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:15,362 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-12-14 08:56:15,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-12-14 08:56:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:56:15,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:15,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:56:15,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1513567066, now seen corresponding path program 1 times [2022-12-14 08:56:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:15,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443901508] [2022-12-14 08:56:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:15,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443901508] [2022-12-14 08:56:15,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443901508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:56:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136532865] [2022-12-14 08:56:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:15,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:56:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:56:15,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:56:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:56:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 08:56:15,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:15,761 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 11 treesize of output 7 [2022-12-14 08:56:15,806 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-14 08:56:15,806 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:56:15,870 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:15,871 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 33 treesize of output 24 [2022-12-14 08:56:15,923 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:15,923 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 16 [2022-12-14 08:56:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:56:16,006 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 38 treesize of output 34 [2022-12-14 08:56:16,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:56:16,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 255 [2022-12-14 08:56:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136532865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:56:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354670447] [2022-12-14 08:56:16,603 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:56:16,603 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:56:16,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:56:16,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:56:16,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:56:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:56:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 08:56:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:56:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:56:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 08:56:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-12-14 08:56:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-12-14 08:56:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 08:56:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 08:56:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:56:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-12-14 08:56:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 08:56:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:16,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-12-14 08:56:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,137 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 08:56:17,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 559 treesize of output 450 [2022-12-14 08:56:17,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,200 INFO L321 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2022-12-14 08:56:17,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 567 treesize of output 563 [2022-12-14 08:56:17,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,230 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 08:56:17,231 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 1 case distinctions, treesize of input 579 treesize of output 562 [2022-12-14 08:56:17,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,512 INFO L321 Elim1Store]: treesize reduction 340, result has 13.9 percent of original size [2022-12-14 08:56:17,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 577 treesize of output 597 [2022-12-14 08:56:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,832 INFO L321 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2022-12-14 08:56:17,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1298 treesize of output 1246 [2022-12-14 08:56:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:17,888 INFO L321 Elim1Store]: treesize reduction 65, result has 9.7 percent of original size [2022-12-14 08:56:17,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 1254 treesize of output 948 [2022-12-14 08:56:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:17,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1291 treesize of output 1254 [2022-12-14 08:56:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,163 INFO L321 Elim1Store]: treesize reduction 108, result has 14.3 percent of original size [2022-12-14 08:56:18,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 1292 treesize of output 928 [2022-12-14 08:56:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,216 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:18,217 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 368 [2022-12-14 08:56:18,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,247 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 08:56:18,248 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 1 case distinctions, treesize of input 354 treesize of output 337 [2022-12-14 08:56:18,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,476 INFO L321 Elim1Store]: treesize reduction 302, result has 9.9 percent of original size [2022-12-14 08:56:18,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 478 treesize of output 475 [2022-12-14 08:56:18,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,805 INFO L321 Elim1Store]: treesize reduction 76, result has 19.1 percent of original size [2022-12-14 08:56:18,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 559 treesize of output 446 [2022-12-14 08:56:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,846 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 08:56:18,846 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 1 case distinctions, treesize of input 571 treesize of output 554 [2022-12-14 08:56:18,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:18,909 INFO L321 Elim1Store]: treesize reduction 92, result has 22.0 percent of original size [2022-12-14 08:56:18,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 567 treesize of output 567 [2022-12-14 08:56:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,231 INFO L321 Elim1Store]: treesize reduction 342, result has 13.4 percent of original size [2022-12-14 08:56:19,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 577 treesize of output 595 [2022-12-14 08:56:19,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,480 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:56:19,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1298 treesize of output 985 [2022-12-14 08:56:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,555 INFO L321 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2022-12-14 08:56:19,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1352 treesize of output 1307 [2022-12-14 08:56:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1351 treesize of output 1314 [2022-12-14 08:56:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,848 INFO L321 Elim1Store]: treesize reduction 87, result has 14.7 percent of original size [2022-12-14 08:56:19,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 1380 treesize of output 997 [2022-12-14 08:56:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,913 INFO L321 Elim1Store]: treesize reduction 111, result has 11.9 percent of original size [2022-12-14 08:56:19,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 1127 treesize of output 1079 [2022-12-14 08:56:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:56:19,951 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 08:56:19,952 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 1 case distinctions, treesize of input 1083 treesize of output 1050 [2022-12-14 08:56:20,117 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 [2022-12-14 08:56:20,125 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 6 treesize of output 5 [2022-12-14 08:56:20,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:56:24,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [354670447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:24,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:56:24,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8, 8] total 29 [2022-12-14 08:56:24,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485385716] [2022-12-14 08:56:24,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:24,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:56:24,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:56:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:56:24,806 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:25,374 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-12-14 08:56:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:56:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:56:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:25,375 INFO L225 Difference]: With dead ends: 73 [2022-12-14 08:56:25,375 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 08:56:25,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:56:25,376 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:25,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:56:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 08:56:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-12-14 08:56:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-12-14 08:56:25,379 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 16 [2022-12-14 08:56:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:25,379 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-12-14 08:56:25,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-12-14 08:56:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:56:25,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:25,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:25,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:56:25,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:56:25,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:25,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1780817557, now seen corresponding path program 1 times [2022-12-14 08:56:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:25,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078329340] [2022-12-14 08:56:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:25,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078329340] [2022-12-14 08:56:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078329340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643548136] [2022-12-14 08:56:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:56:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:56:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:25,653 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:25,710 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-12-14 08:56:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:56:25,711 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:56:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:25,711 INFO L225 Difference]: With dead ends: 58 [2022-12-14 08:56:25,711 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 08:56:25,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:25,712 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:25,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 79 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 08:56:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 08:56:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-12-14 08:56:25,715 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 17 [2022-12-14 08:56:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-12-14 08:56:25,716 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-12-14 08:56:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:56:25,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:25,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:56:25,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -629230463, now seen corresponding path program 1 times [2022-12-14 08:56:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303387866] [2022-12-14 08:56:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:25,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303387866] [2022-12-14 08:56:25,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303387866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:25,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:25,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112539881] [2022-12-14 08:56:25,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:25,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:25,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:25,829 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:25,901 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-12-14 08:56:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:56:25,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:56:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:25,902 INFO L225 Difference]: With dead ends: 57 [2022-12-14 08:56:25,902 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 08:56:25,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:56:25,903 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:25,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 08:56:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 08:56:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-12-14 08:56:25,906 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 18 [2022-12-14 08:56:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:25,906 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-12-14 08:56:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-12-14 08:56:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:56:25,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:25,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:56:25,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash -629230462, now seen corresponding path program 1 times [2022-12-14 08:56:25,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307776034] [2022-12-14 08:56:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:25,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:25,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307776034] [2022-12-14 08:56:25,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307776034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:25,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:25,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017320581] [2022-12-14 08:56:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:25,943 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:25,972 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-12-14 08:56:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:56:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:25,973 INFO L225 Difference]: With dead ends: 53 [2022-12-14 08:56:25,973 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 08:56:25,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:25,974 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:25,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 19 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 08:56:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 08:56:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-12-14 08:56:25,975 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 18 [2022-12-14 08:56:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:25,975 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-12-14 08:56:25,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-12-14 08:56:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:56:25,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:25,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:25,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:56:25,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash 899966340, now seen corresponding path program 1 times [2022-12-14 08:56:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460110269] [2022-12-14 08:56:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:56:25,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:56:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:56:26,024 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:56:26,024 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:56:26,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK (43 of 44 remaining) [2022-12-14 08:56:26,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 44 remaining) [2022-12-14 08:56:26,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 44 remaining) [2022-12-14 08:56:26,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 44 remaining) [2022-12-14 08:56:26,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 44 remaining) [2022-12-14 08:56:26,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (24 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (23 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (22 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 44 remaining) [2022-12-14 08:56:26,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (15 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (14 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (13 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 44 remaining) [2022-12-14 08:56:26,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (4 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE (3 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE (2 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 44 remaining) [2022-12-14 08:56:26,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 44 remaining) [2022-12-14 08:56:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:56:26,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:26,041 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:56:26,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:56:26 BoogieIcfgContainer [2022-12-14 08:56:26,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:56:26,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:56:26,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:56:26,059 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:56:26,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:13" (3/4) ... [2022-12-14 08:56:26,061 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 08:56:26,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:56:26,062 INFO L158 Benchmark]: Toolchain (without parser) took 13641.23ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 122.0MB in the beginning and 230.4MB in the end (delta: -108.4MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,062 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:56:26,062 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.01ms. Allocated memory is still 153.1MB. Free memory was 121.5MB in the beginning and 104.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,062 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.92ms. Allocated memory is still 153.1MB. Free memory was 104.9MB in the beginning and 102.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,062 INFO L158 Benchmark]: Boogie Preprocessor took 19.98ms. Allocated memory is still 153.1MB. Free memory was 102.9MB in the beginning and 101.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,063 INFO L158 Benchmark]: RCFGBuilder took 415.02ms. Allocated memory is still 153.1MB. Free memory was 101.4MB in the beginning and 79.0MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,063 INFO L158 Benchmark]: TraceAbstraction took 12910.01ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 78.4MB in the beginning and 230.4MB in the end (delta: -152.0MB). Peak memory consumption was 118.7MB. Max. memory is 16.1GB. [2022-12-14 08:56:26,063 INFO L158 Benchmark]: Witness Printer took 2.71ms. Allocated memory is still 268.4MB. Free memory is still 230.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:56:26,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.01ms. Allocated memory is still 153.1MB. Free memory was 121.5MB in the beginning and 104.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.92ms. Allocated memory is still 153.1MB. Free memory was 104.9MB in the beginning and 102.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.98ms. Allocated memory is still 153.1MB. Free memory was 102.9MB in the beginning and 101.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 415.02ms. Allocated memory is still 153.1MB. Free memory was 101.4MB in the beginning and 79.0MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 12910.01ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 78.4MB in the beginning and 230.4MB in the end (delta: -152.0MB). Peak memory consumption was 118.7MB. Max. memory is 16.1GB. * Witness Printer took 2.71ms. Allocated memory is still 268.4MB. Free memory is still 230.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [c=0, length=0, list={6:0}] [L544] CALL append(&list) [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\read(**plist)={0:0}, c=1, item={3:0}, plist={6:0}, plist={6:0}] [L533] item->next = *plist [L534] EXPR item->next VAL [c=1, item={3:0}, item->next={0:0}, plist={6:0}, plist={6:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, c=1, item={3:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={6:0}, plist={6:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L537] *plist = item [L544] RET append(&list) [L545] length++ [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [c=1, length=1, list={6:0}] [L548] COND FALSE !(length < 0) VAL [c=1, length=1, list={6:0}] [L551] EXPR \read(*list) VAL [\read(*list)={3:0}, c=1, length=1, list={6:0}] [L551] EXPR list->next [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\read(*list)={3:0}, c=1, length=1, list={6:0}, next={0:0}] [L552] free(list) VAL [\read(*list)={3:0}, c=1, length=1, list={6:0}, next={0:0}] [L552] free(list) VAL [\read(*list)={3:0}, c=1, length=1, list={6:0}, next={0:0}] [L552] free(list) [L553] list = next [L554] length-- VAL [c=1, length=0, list={6:0}, next={0:0}] [L556] COND FALSE !(length > 0) [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 79 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 12.9s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 819 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 819 mSDsluCounter, 911 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 526 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1181 IncrementalHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 385 mSDtfsCounter, 1181 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=0, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 81 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 176 ConstructedInterpolants, 7 QuantifiedInterpolants, 1511 SizeOfPredicates, 17 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 16 InterpolantComputations, 13 PerfectInterpolantSequences, 3/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 3.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 29, TOOLS_POST_TIME: 3.4s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 3.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 47, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 2.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 115, DAG_COMPRESSION_RETAINED_NODES: 39, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 08:56:26,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh --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 b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 --- 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-2329fc7 [2022-12-14 08:56:27,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:56:27,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:56:27,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:56:27,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:56:27,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:56:27,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:56:27,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:56:27,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:56:27,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:56:27,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:56:27,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:56:27,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:56:27,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:56:27,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:56:27,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:56:27,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:56:27,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:56:27,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:56:27,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:56:27,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:56:27,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:56:27,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:56:27,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:56:27,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:56:27,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:56:27,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:56:27,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:56:27,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:56:27,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:56:27,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:56:27,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:56:27,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:56:27,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:56:27,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:56:27,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:56:27,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:56:27,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:56:27,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:56:27,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:56:27,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:56:27,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 08:56:27,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:56:27,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:56:27,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:56:27,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:56:27,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:56:27,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:56:27,685 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:56:27,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:56:27,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:56:27,685 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:56:27,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:56:27,686 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:56:27,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:56:27,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:56:27,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:56:27,687 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:56:27,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:56:27,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:56:27,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:56:27,688 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:56:27,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:27,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:56:27,689 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:56:27,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:56:27,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:56:27,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:56:27,690 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 [2022-12-14 08:56:27,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:56:27,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:56:27,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:56:27,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:56:27,926 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:56:27,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2022-12-14 08:56:30,460 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:56:30,655 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:56:30,655 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2022-12-14 08:56:30,666 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/ad73b4743/fe5344b8cecf47ff92f764d655cf1a6d/FLAG4928e25d0 [2022-12-14 08:56:31,023 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/data/ad73b4743/fe5344b8cecf47ff92f764d655cf1a6d [2022-12-14 08:56:31,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:56:31,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:56:31,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:31,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:56:31,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:56:31,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2903a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31, skipping insertion in model container [2022-12-14 08:56:31,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:56:31,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:56:31,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:31,316 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:56:31,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:31,374 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:56:31,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31 WrapperNode [2022-12-14 08:56:31,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:31,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:31,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:56:31,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:56:31,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,408 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-12-14 08:56:31,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:31,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:56:31,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:56:31,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:56:31,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:56:31,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:56:31,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:56:31,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:56:31,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (1/1) ... [2022-12-14 08:56:31,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:56:31,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:56:31,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:56:31,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:56:31,585 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:56:31,586 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:56:31,937 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:56:31,943 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:56:31,943 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:56:31,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:31 BoogieIcfgContainer [2022-12-14 08:56:31,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:56:31,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:56:31,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:56:31,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:56:31,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:56:31" (1/3) ... [2022-12-14 08:56:31,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367c629d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:31, skipping insertion in model container [2022-12-14 08:56:31,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:31" (2/3) ... [2022-12-14 08:56:31,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367c629d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:31, skipping insertion in model container [2022-12-14 08:56:31,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:31" (3/3) ... [2022-12-14 08:56:31,955 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2022-12-14 08:56:31,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:56:31,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-14 08:56:32,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:56:32,017 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;@20629d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:56:32,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2022-12-14 08:56:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:56:32,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:32,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:56:32,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2022-12-14 08:56:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297126250] [2022-12-14 08:56:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:32,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:32,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:32,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:32,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 08:56:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:56:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:32,185 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 7 [2022-12-14 08:56:32,230 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 08:56:32,230 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 14 treesize of output 20 [2022-12-14 08:56:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:32,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:32,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:32,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297126250] [2022-12-14 08:56:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297126250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:32,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:32,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:56:32,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356775533] [2022-12-14 08:56:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:32,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:32,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:32,289 INFO L87 Difference]: Start difference. First operand has 90 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:32,541 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-12-14 08:56:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:56:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:56:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:32,549 INFO L225 Difference]: With dead ends: 115 [2022-12-14 08:56:32,549 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 08:56:32,550 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 [2022-12-14 08:56:32,553 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:32,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 70 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:56:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 08:56:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2022-12-14 08:56:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-12-14 08:56:32,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 4 [2022-12-14 08:56:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:32,578 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-12-14 08:56:32,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-12-14 08:56:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:56:32,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:32,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:56:32,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:56:32,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:32,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2022-12-14 08:56:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:32,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357312952] [2022-12-14 08:56:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:32,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:32,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:32,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 08:56:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:56:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:32,976 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 7 [2022-12-14 08:56:32,985 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 [2022-12-14 08:56:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:33,034 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 14 [2022-12-14 08:56:33,048 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:56:33,048 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 13 treesize of output 13 [2022-12-14 08:56:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:33,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:33,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357312952] [2022-12-14 08:56:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357312952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:33,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:33,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:56:33,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745716408] [2022-12-14 08:56:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:33,064 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:33,505 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2022-12-14 08:56:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:56:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:56:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:33,507 INFO L225 Difference]: With dead ends: 193 [2022-12-14 08:56:33,507 INFO L226 Difference]: Without dead ends: 193 [2022-12-14 08:56:33,507 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 [2022-12-14 08:56:33,508 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 168 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:33,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 131 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:56:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-14 08:56:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 92. [2022-12-14 08:56:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-12-14 08:56:33,515 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 4 [2022-12-14 08:56:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:33,515 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-12-14 08:56:33,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-12-14 08:56:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:56:33,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:33,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:56:33,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 08:56:33,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:33,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2022-12-14 08:56:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:33,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828169157] [2022-12-14 08:56:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:33,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:33,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 08:56:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:56:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:33,864 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 7 [2022-12-14 08:56:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:33,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:33,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828169157] [2022-12-14 08:56:33,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828169157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:33,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:33,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000687101] [2022-12-14 08:56:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:33,874 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:34,000 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-12-14 08:56:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:56:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:34,001 INFO L225 Difference]: With dead ends: 106 [2022-12-14 08:56:34,002 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 08:56:34,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:34,003 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:34,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 08:56:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2022-12-14 08:56:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.75) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-12-14 08:56:34,009 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 5 [2022-12-14 08:56:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:34,009 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-12-14 08:56:34,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-12-14 08:56:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:56:34,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:34,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:56:34,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 08:56:34,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:34,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2022-12-14 08:56:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:34,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558718622] [2022-12-14 08:56:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:34,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:34,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:34,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 08:56:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:56:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:34,343 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 [2022-12-14 08:56:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:34,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:34,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:34,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558718622] [2022-12-14 08:56:34,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558718622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:34,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:34,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:34,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388758317] [2022-12-14 08:56:34,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:34,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:34,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:34,360 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:34,466 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-12-14 08:56:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:56:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:34,467 INFO L225 Difference]: With dead ends: 85 [2022-12-14 08:56:34,467 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 08:56:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:34,468 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:34,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 08:56:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-12-14 08:56:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-12-14 08:56:34,472 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 5 [2022-12-14 08:56:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:34,472 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-12-14 08:56:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-12-14 08:56:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:56:34,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:34,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:34,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 08:56:34,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:34,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2022-12-14 08:56:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:34,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796140706] [2022-12-14 08:56:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:34,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:34,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:34,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:34,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 08:56:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:56:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:34,882 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:34,882 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 23 treesize of output 18 [2022-12-14 08:56:34,903 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:34,904 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 23 treesize of output 18 [2022-12-14 08:56:34,979 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:34,979 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 26 treesize of output 10 [2022-12-14 08:56:34,987 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:34,987 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 26 treesize of output 10 [2022-12-14 08:56:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:35,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:35,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796140706] [2022-12-14 08:56:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796140706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:35,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:35,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:56:35,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404428976] [2022-12-14 08:56:35,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:35,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:56:35,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:56:35,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:56:35,008 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:35,563 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-12-14 08:56:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:56:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:56:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:35,565 INFO L225 Difference]: With dead ends: 94 [2022-12-14 08:56:35,565 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 08:56:35,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:56:35,566 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:35,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 352 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:56:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 08:56:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-12-14 08:56:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.596774193548387) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-12-14 08:56:35,572 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 10 [2022-12-14 08:56:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:35,573 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-12-14 08:56:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-12-14 08:56:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:56:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:35,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:35,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 08:56:35,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:35,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075788, now seen corresponding path program 1 times [2022-12-14 08:56:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269548506] [2022-12-14 08:56:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:35,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:35,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 08:56:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:56:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:56:35,999 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 14 treesize of output 16 [2022-12-14 08:56:36,006 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:56:36,006 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 13 treesize of output 13 [2022-12-14 08:56:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:36,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:36,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269548506] [2022-12-14 08:56:36,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269548506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:36,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:36,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:56:36,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551786519] [2022-12-14 08:56:36,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:36,030 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:36,221 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-12-14 08:56:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:56:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:56:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:36,222 INFO L225 Difference]: With dead ends: 106 [2022-12-14 08:56:36,222 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 08:56:36,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:56:36,222 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 330 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:36,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 53 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:56:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 08:56:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2022-12-14 08:56:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-12-14 08:56:36,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 11 [2022-12-14 08:56:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:36,226 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-12-14 08:56:36,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-12-14 08:56:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:56:36,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:36,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:36,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 08:56:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:36,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1870124675, now seen corresponding path program 1 times [2022-12-14 08:56:36,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882972709] [2022-12-14 08:56:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:36,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:36,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:36,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 08:56:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:56:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:36,615 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 11 treesize of output 7 [2022-12-14 08:56:36,633 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 19 treesize of output 11 [2022-12-14 08:56:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:36,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:36,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882972709] [2022-12-14 08:56:36,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882972709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:36,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:36,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:56:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916149316] [2022-12-14 08:56:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:36,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:36,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:36,643 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:36,930 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-12-14 08:56:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:56:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:56:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:36,931 INFO L225 Difference]: With dead ends: 102 [2022-12-14 08:56:36,931 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 08:56:36,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:56:36,932 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:36,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 107 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:56:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 08:56:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2022-12-14 08:56:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-12-14 08:56:36,937 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 17 [2022-12-14 08:56:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:36,938 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-12-14 08:56:36,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-12-14 08:56:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:56:36,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:36,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:36,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 08:56:37,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:37,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1870124676, now seen corresponding path program 1 times [2022-12-14 08:56:37,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:37,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539515553] [2022-12-14 08:56:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:37,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:37,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 08:56:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:37,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:56:37,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:37,337 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 11 treesize of output 7 [2022-12-14 08:56:37,342 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 11 treesize of output 7 [2022-12-14 08:56:37,378 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 17 treesize of output 9 [2022-12-14 08:56:37,383 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 15 treesize of output 7 [2022-12-14 08:56:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:37,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:37,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539515553] [2022-12-14 08:56:37,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539515553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:37,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:37,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:56:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155597297] [2022-12-14 08:56:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:37,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:37,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:37,397 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:37,713 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-12-14 08:56:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:56:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:56:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:37,714 INFO L225 Difference]: With dead ends: 97 [2022-12-14 08:56:37,714 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 08:56:37,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:56:37,715 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 210 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:37,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 100 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:56:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 08:56:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2022-12-14 08:56:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-12-14 08:56:37,717 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 17 [2022-12-14 08:56:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:37,718 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-12-14 08:56:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-12-14 08:56:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:56:37,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:37,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:37,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 08:56:37,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:37,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:37,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1870110741, now seen corresponding path program 1 times [2022-12-14 08:56:37,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:37,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841241276] [2022-12-14 08:56:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:37,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:37,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:37,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:37,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 08:56:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:56:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:38,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:38,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841241276] [2022-12-14 08:56:38,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841241276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:38,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:38,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907438124] [2022-12-14 08:56:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:56:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:56:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:38,042 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:38,067 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-12-14 08:56:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:56:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:56:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:38,069 INFO L225 Difference]: With dead ends: 125 [2022-12-14 08:56:38,069 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 08:56:38,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:56:38,070 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 33 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:38,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 206 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:56:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 08:56:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2022-12-14 08:56:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.513157894736842) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-12-14 08:56:38,076 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 17 [2022-12-14 08:56:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:38,076 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-12-14 08:56:38,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-12-14 08:56:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:56:38,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:38,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:38,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 08:56:38,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:38,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1431526068, now seen corresponding path program 1 times [2022-12-14 08:56:38,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:38,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727739408] [2022-12-14 08:56:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:38,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:38,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 08:56:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:56:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:38,420 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 11 treesize of output 7 [2022-12-14 08:56:38,442 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 15 treesize of output 7 [2022-12-14 08:56:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:38,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:38,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727739408] [2022-12-14 08:56:38,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727739408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:38,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:38,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:38,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826682494] [2022-12-14 08:56:38,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:56:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:56:38,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:56:38,449 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:38,618 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2022-12-14 08:56:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:56:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 08:56:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:38,620 INFO L225 Difference]: With dead ends: 113 [2022-12-14 08:56:38,620 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 08:56:38,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:56:38,620 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:38,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 111 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:56:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 08:56:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2022-12-14 08:56:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.486842105263158) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2022-12-14 08:56:38,623 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 20 [2022-12-14 08:56:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:38,623 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2022-12-14 08:56:38,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2022-12-14 08:56:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:56:38,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:38,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:38,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 08:56:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:38,828 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1427635036, now seen corresponding path program 1 times [2022-12-14 08:56:38,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:38,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297887991] [2022-12-14 08:56:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:38,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:38,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:38,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:38,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 08:56:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:56:38,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:39,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 08:56:39,050 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 23 treesize of output 11 [2022-12-14 08:56:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:39,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:56:39,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297887991] [2022-12-14 08:56:39,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297887991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:39,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:39,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:56:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641175598] [2022-12-14 08:56:39,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:56:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:56:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:56:39,070 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:39,387 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2022-12-14 08:56:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:56:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:56:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:39,389 INFO L225 Difference]: With dead ends: 112 [2022-12-14 08:56:39,389 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 08:56:39,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:56:39,390 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 122 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:39,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 91 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:56:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 08:56:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-12-14 08:56:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2022-12-14 08:56:39,393 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 21 [2022-12-14 08:56:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:39,395 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2022-12-14 08:56:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2022-12-14 08:56:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:56:39,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:39,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:39,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 08:56:39,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:39,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:39,598 INFO L85 PathProgramCache]: Analyzing trace with hash 717052317, now seen corresponding path program 1 times [2022-12-14 08:56:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:39,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489640873] [2022-12-14 08:56:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:39,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:39,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:39,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:39,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 08:56:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:56:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:39,736 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 7 [2022-12-14 08:56:39,761 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 11 treesize of output 7 [2022-12-14 08:56:39,792 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 08:56:39,792 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 24 [2022-12-14 08:56:39,855 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:39,855 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 27 treesize of output 22 [2022-12-14 08:56:39,917 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:39,917 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 30 treesize of output 14 [2022-12-14 08:56:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:39,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:56:40,010 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 [2022-12-14 08:56:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:40,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:56:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489640873] [2022-12-14 08:56:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489640873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:56:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895181067] [2022-12-14 08:56:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:56:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:56:40,155 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:56:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 08:56:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:40,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:56:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:40,414 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 11 treesize of output 7 [2022-12-14 08:56:40,467 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 08:56:40,467 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 24 [2022-12-14 08:56:40,555 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:40,555 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 27 treesize of output 22 [2022-12-14 08:56:40,632 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:40,633 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 30 treesize of output 14 [2022-12-14 08:56:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:40,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:56:40,680 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 [2022-12-14 08:56:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:40,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895181067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:56:40,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816543752] [2022-12-14 08:56:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:56:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:56:40,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:56:40,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:56:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:56:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:40,875 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 11 treesize of output 7 [2022-12-14 08:56:40,903 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 08:56:40,903 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 08:56:41,018 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:41,018 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 35 treesize of output 26 [2022-12-14 08:56:41,083 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 27 treesize of output 15 [2022-12-14 08:56:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:41,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:56:41,122 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 [2022-12-14 08:56:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:41,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816543752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:56:41,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:56:41,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 8, 8, 8] total 23 [2022-12-14 08:56:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010983838] [2022-12-14 08:56:41,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:56:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 08:56:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:56:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 08:56:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:56:41,204 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:44,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:56:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:45,105 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-12-14 08:56:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:56:45,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:56:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:45,106 INFO L225 Difference]: With dead ends: 116 [2022-12-14 08:56:45,106 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 08:56:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:56:45,107 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 431 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 392 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 578 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 08:56:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 08:56:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2022-12-14 08:56:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-12-14 08:56:45,109 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 21 [2022-12-14 08:56:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:45,109 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-12-14 08:56:45,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-12-14 08:56:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:56:45,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:45,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:45,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 08:56:45,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 08:56:45,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 08:56:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:45,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:56:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:45,713 INFO L85 PathProgramCache]: Analyzing trace with hash 717052318, now seen corresponding path program 1 times [2022-12-14 08:56:45,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:56:45,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338709430] [2022-12-14 08:56:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:45,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:56:45,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:56:45,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:56:45,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 08:56:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:45,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 08:56:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:56:45,926 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 11 treesize of output 7 [2022-12-14 08:56:45,931 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 11 treesize of output 7 [2022-12-14 08:56:45,989 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 08:56:45,990 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 26 [2022-12-14 08:56:46,009 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 08:56:46,009 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 17 treesize of output 17 [2022-12-14 08:56:46,090 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:46,090 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 33 treesize of output 24 [2022-12-14 08:56:46,111 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:56:46,111 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 1 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:56:46,219 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:46,220 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 16 [2022-12-14 08:56:46,228 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:56:46,229 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 1 case distinctions, treesize of input 22 treesize of output 10 [2022-12-14 08:56:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:56:46,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:56:48,709 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 66 treesize of output 62 [2022-12-14 08:56:48,712 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 102 treesize of output 94 [2022-12-14 08:56:49,189 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 40 treesize of output 32 [2022-12-14 08:57:07,655 WARN L233 SmtUtils]: Spent 17.30s on a formula simplification. DAG size of input: 59 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:57:08,000 INFO L321 Elim1Store]: treesize reduction 7, result has 88.5 percent of original size [2022-12-14 08:57:08,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 160 [2022-12-14 08:57:08,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:57:08,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 194 [2022-12-14 08:57:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:08,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338709430] [2022-12-14 08:57:08,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338709430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172580548] [2022-12-14 08:57:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:08,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:57:08,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:57:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 08:57:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 08:57:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:08,641 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 7 [2022-12-14 08:57:08,650 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 [2022-12-14 08:57:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:57:08,813 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 14 [2022-12-14 08:57:08,831 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:57:08,831 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 13 treesize of output 13 [2022-12-14 08:57:08,941 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 11 treesize of output 7 [2022-12-14 08:57:08,950 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 11 treesize of output 7 [2022-12-14 08:57:09,068 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 08:57:09,069 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 17 treesize of output 17 [2022-12-14 08:57:09,077 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 [2022-12-14 08:57:09,291 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:57:09,291 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 1 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:57:09,321 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:57:09,322 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 33 treesize of output 24 [2022-12-14 08:57:09,500 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:57:09,501 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 1 case distinctions, treesize of input 22 treesize of output 10 [2022-12-14 08:57:09,513 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:57:09,513 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 16 [2022-12-14 08:57:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:09,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:09,851 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 66 treesize of output 62 [2022-12-14 08:57:09,855 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 102 treesize of output 94 [2022-12-14 08:57:10,411 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 40 treesize of output 32 [2022-12-14 08:57:25,511 WARN L233 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 59 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:57:25,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:57:25,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2022-12-14 08:57:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1172580548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802785936] [2022-12-14 08:57:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:34,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:34,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:34,586 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:57:34,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:57:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 08:57:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:34,772 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 11 treesize of output 7 [2022-12-14 08:57:34,780 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 11 treesize of output 7 [2022-12-14 08:57:34,847 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 08:57:34,847 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 26 [2022-12-14 08:57:34,874 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 08:57:34,875 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 17 treesize of output 17 [2022-12-14 08:57:34,947 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:57:34,947 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 1 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:57:34,975 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 08:57:34,975 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 33 treesize of output 24 [2022-12-14 08:57:35,110 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:57:35,110 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 16 [2022-12-14 08:57:35,125 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:57:35,125 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 1 case distinctions, treesize of input 22 treesize of output 10 [2022-12-14 08:57:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:35,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:35,461 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 66 treesize of output 62 [2022-12-14 08:57:35,464 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 102 treesize of output 94 [2022-12-14 08:57:36,017 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 40 treesize of output 32 [2022-12-14 08:57:38,648 INFO L321 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2022-12-14 08:57:38,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2022-12-14 08:57:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 55 treesize of output 51 [2022-12-14 08:57:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:38,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802785936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:38,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:57:38,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 25 [2022-12-14 08:57:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740813492] [2022-12-14 08:57:38,818 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:57:38,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 08:57:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 08:57:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=561, Unknown=4, NotChecked=0, Total=650 [2022-12-14 08:57:38,820 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:42,660 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-12-14 08:57:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:57:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:57:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:42,662 INFO L225 Difference]: With dead ends: 122 [2022-12-14 08:57:42,662 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 08:57:42,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=254, Invalid=1002, Unknown=4, NotChecked=0, Total=1260 [2022-12-14 08:57:42,663 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 537 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:42,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 404 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 08:57:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 08:57:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2022-12-14 08:57:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 97 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2022-12-14 08:57:42,667 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 21 [2022-12-14 08:57:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:42,667 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2022-12-14 08:57:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2022-12-14 08:57:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:57:42,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:42,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:42,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 08:57:42,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 08:57:43,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:43,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:57:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1307013042, now seen corresponding path program 1 times [2022-12-14 08:57:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715963475] [2022-12-14 08:57:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:43,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:57:43,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 08:57:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:57:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:43,461 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 11 treesize of output 7 [2022-12-14 08:57:43,488 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 19 treesize of output 11 [2022-12-14 08:57:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:43,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:43,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715963475] [2022-12-14 08:57:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715963475] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:43,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:57:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490040084] [2022-12-14 08:57:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:43,506 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:43,889 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-12-14 08:57:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:57:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 08:57:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:43,890 INFO L225 Difference]: With dead ends: 110 [2022-12-14 08:57:43,890 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 08:57:43,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:57:43,891 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 112 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:43,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 96 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:57:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 08:57:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-12-14 08:57:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-12-14 08:57:43,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 22 [2022-12-14 08:57:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:43,893 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-12-14 08:57:43,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-12-14 08:57:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:57:43,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:43,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:43,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 08:57:44,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:44,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:57:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1862698521, now seen corresponding path program 1 times [2022-12-14 08:57:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594505558] [2022-12-14 08:57:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:44,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:44,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:57:44,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 08:57:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:57:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:44,218 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 7 [2022-12-14 08:57:44,242 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:57:44,242 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 13 treesize of output 13 [2022-12-14 08:57:44,294 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 7 [2022-12-14 08:57:44,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 08:57:44,390 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 16 treesize of output 8 [2022-12-14 08:57:44,427 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 14 treesize of output 20 [2022-12-14 08:57:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:44,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:44,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594505558] [2022-12-14 08:57:44,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594505558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:44,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:44,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:57:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770615109] [2022-12-14 08:57:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:44,433 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:44,817 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-12-14 08:57:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:57:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:44,819 INFO L225 Difference]: With dead ends: 112 [2022-12-14 08:57:44,819 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 08:57:44,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:57:44,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:44,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 76 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:57:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 08:57:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-12-14 08:57:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.4) internal successors, (112), 101 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2022-12-14 08:57:44,821 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 23 [2022-12-14 08:57:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:44,822 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2022-12-14 08:57:44,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2022-12-14 08:57:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:57:44,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:44,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:44,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:45,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:45,024 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:57:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1862698520, now seen corresponding path program 1 times [2022-12-14 08:57:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145840158] [2022-12-14 08:57:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:45,030 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:57:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 08:57:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:57:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:45,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:45,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:45,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145840158] [2022-12-14 08:57:45,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145840158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:45,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:45,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79772885] [2022-12-14 08:57:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:45,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:45,204 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:45,309 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-12-14 08:57:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:57:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:45,309 INFO L225 Difference]: With dead ends: 96 [2022-12-14 08:57:45,310 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 08:57:45,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:45,310 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:45,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 08:57:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-12-14 08:57:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.28) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-12-14 08:57:45,312 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 23 [2022-12-14 08:57:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:45,312 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-12-14 08:57:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-12-14 08:57:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 08:57:45,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:45,313 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:57:45,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 08:57:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:45,514 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-12-14 08:57:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash 577213201, now seen corresponding path program 1 times [2022-12-14 08:57:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206634285] [2022-12-14 08:57:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:45,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:57:45,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 08:57:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:57:45,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:57:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:57:45,779 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-12-14 08:57:45,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:57:45,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK (43 of 44 remaining) [2022-12-14 08:57:45,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 44 remaining) [2022-12-14 08:57:45,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 44 remaining) [2022-12-14 08:57:45,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (24 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (23 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (22 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 44 remaining) [2022-12-14 08:57:45,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (15 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (14 of 44 remaining) [2022-12-14 08:57:45,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (13 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 44 remaining) [2022-12-14 08:57:45,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (4 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE (3 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE (2 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 44 remaining) [2022-12-14 08:57:45,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 44 remaining) [2022-12-14 08:57:45,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 08:57:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:45,993 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:45,999 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:57:46,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:57:46 BoogieIcfgContainer [2022-12-14 08:57:46,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:57:46,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:57:46,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:57:46,042 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:57:46,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:31" (3/4) ... [2022-12-14 08:57:46,045 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 08:57:46,045 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:57:46,045 INFO L158 Benchmark]: Toolchain (without parser) took 75016.97ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 29.9MB in the beginning and 37.3MB in the end (delta: -7.4MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,045 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory was 27.3MB in the beginning and 27.2MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:57:46,045 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.39ms. Allocated memory is still 58.7MB. Free memory was 29.6MB in the beginning and 25.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.46ms. Allocated memory is still 58.7MB. Free memory was 25.9MB in the beginning and 37.3MB in the end (delta: -11.3MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,046 INFO L158 Benchmark]: Boogie Preprocessor took 21.83ms. Allocated memory is still 58.7MB. Free memory was 37.3MB in the beginning and 35.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,046 INFO L158 Benchmark]: RCFGBuilder took 514.43ms. Allocated memory is still 58.7MB. Free memory was 35.4MB in the beginning and 25.7MB in the end (delta: 9.8MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,046 INFO L158 Benchmark]: TraceAbstraction took 74093.24ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 24.9MB in the beginning and 37.8MB in the end (delta: -12.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2022-12-14 08:57:46,046 INFO L158 Benchmark]: Witness Printer took 3.27ms. Allocated memory is still 71.3MB. Free memory was 37.8MB in the beginning and 37.3MB in the end (delta: 521.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:57:46,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory was 27.3MB in the beginning and 27.2MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.39ms. Allocated memory is still 58.7MB. Free memory was 29.6MB in the beginning and 25.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.46ms. Allocated memory is still 58.7MB. Free memory was 25.9MB in the beginning and 37.3MB in the end (delta: -11.3MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.83ms. Allocated memory is still 58.7MB. Free memory was 37.3MB in the beginning and 35.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 514.43ms. Allocated memory is still 58.7MB. Free memory was 35.4MB in the beginning and 25.7MB in the end (delta: 9.8MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * TraceAbstraction took 74093.24ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 24.9MB in the beginning and 37.8MB in the end (delta: -12.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * Witness Printer took 3.27ms. Allocated memory is still 71.3MB. Free memory was 37.8MB in the beginning and 37.3MB in the end (delta: 521.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [c=0, length=0, list={10:0}] [L544] CALL append(&list) [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\read(**plist)={0:0}, c=1, item={3:0}, plist={10:0}, plist={10:0}] [L533] item->next = *plist VAL [\read(**plist)={0:0}, c=1, item={3:0}, plist={10:0}, plist={10:0}] [L534] EXPR item->next VAL [c=1, item={3:0}, item->next={0:0}, plist={10:0}, plist={10:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={7:0}, c=1, item={3:0}, item->next={0:0}, malloc(sizeof *item)={7:0}, plist={10:0}, plist={10:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={7:0}, c=1, item={3:0}, item->next={0:0}, malloc(sizeof *item)={7:0}, plist={10:0}, plist={10:0}] [L537] *plist = item VAL [c=1, item={3:0}, plist={10:0}, plist={10:0}] [L544] RET append(&list) [L545] length++ VAL [c=1, length=1, list={10:0}] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [c=1, length=1, list={10:0}] [L548] COND FALSE !(length < 0) VAL [c=1, length=1, list={10:0}] [L551] EXPR \read(*list) VAL [\read(*list)={3:0}, c=1, length=1, list={10:0}] [L551] EXPR list->next VAL [\read(*list)={3:0}, c=1, length=1, list={10:0}, list->next={0:0}] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\read(*list)={3:0}, c=1, length=1, list={10:0}, next={0:0}] [L552] free(list) VAL [\read(*list)={3:0}, c=1, length=1, list={10:0}, next={0:0}] [L552] free(list) VAL [\read(*list)={3:0}, c=1, length=1, list={10:0}, next={0:0}] [L552] free(list) [L553] list = next VAL [c=1, length=1, list={10:0}, next={0:0}] [L554] length-- VAL [c=1, length=0, list={10:0}, next={0:0}] [L556] COND FALSE !(length > 0) VAL [c=1, length=0, list={10:0}, next={0:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 90 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 74.0s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 2744 SdHoareTripleChecker+Valid, 8.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2744 mSDsluCounter, 2349 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1592 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2475 IncrementalHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 757 mSDtfsCounter, 2475 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 470 GetRequests, 327 SyntacticMatches, 10 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 51.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=9, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 314 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 55.6s InterpolantComputationTime, 352 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 425 ConstructedInterpolants, 57 QuantifiedInterpolants, 6375 SizeOfPredicates, 200 NumberOfNonLiveVariables, 2265 ConjunctsInSsa, 288 ConjunctsInUnsatCore, 26 InterpolantComputations, 14 PerfectInterpolantSequences, 12/72 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 08:57:46,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fefc9-bb66-48f8-9692-2c0467c46a77/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample