./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:39:14,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:39:14,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:39:14,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:39:14,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:39:14,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:39:14,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:39:14,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:39:14,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:39:14,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:39:14,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:39:14,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:39:14,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:39:14,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:39:14,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:39:14,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:39:14,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:39:14,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:39:14,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:39:14,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:39:14,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:39:14,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:39:14,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:39:14,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:39:14,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:39:14,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:39:14,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:39:14,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:39:14,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:39:14,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:39:14,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:39:14,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:39:14,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:39:14,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:39:14,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:39:14,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:39:14,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:39:14,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:39:14,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:39:14,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:39:14,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:39:14,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:39:14,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:39:14,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:39:14,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:39:14,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:39:14,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:39:14,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:39:14,609 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:39:14,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:39:14,610 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:39:14,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:39:14,611 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:39:14,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:39:14,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:39:14,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:39:14,613 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:39:14,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:39:14,613 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:39:14,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:39:14,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:39:14,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:39:14,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:39:14,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:39:14,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:39:14,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:39:14,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:39:14,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:39:14,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:39:14,619 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:39:14,619 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:39:14,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:39:14,620 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:39:14,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:39:14,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:39:14,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:39:14,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:39:14,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:14,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:39:14,622 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:39:14,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:39:14,622 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:39:14,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:39:14,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:39:14,623 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_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2022-11-26 00:39:14,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:39:14,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:39:14,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:39:14,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:39:14,971 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:39:14,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/verifythis/elimination_max.c [2022-11-26 00:39:18,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:39:19,056 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:39:19,059 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/sv-benchmarks/c/verifythis/elimination_max.c [2022-11-26 00:39:19,067 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/data/de5f8a9d0/7d6eb742974445a2992f70d23296ef7f/FLAG13f1f5d7d [2022-11-26 00:39:19,091 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/data/de5f8a9d0/7d6eb742974445a2992f70d23296ef7f [2022-11-26 00:39:19,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:39:19,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:39:19,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:19,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:39:19,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:39:19,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cd755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19, skipping insertion in model container [2022-11-26 00:39:19,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:39:19,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:39:19,353 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2022-11-26 00:39:19,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:19,390 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:39:19,405 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2022-11-26 00:39:19,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:19,431 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:39:19,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19 WrapperNode [2022-11-26 00:39:19,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:19,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:19,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:39:19,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:39:19,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,481 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-11-26 00:39:19,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:19,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:39:19,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:39:19,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:39:19,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:39:19,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:39:19,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:39:19,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:39:19,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (1/1) ... [2022-11-26 00:39:19,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:19,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:39:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:39:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:39:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:39:19,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:39:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:39:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:39:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:39:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:39:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:39:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:39:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:39:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:39:19,795 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:39:19,797 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:39:20,083 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:39:20,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:39:20,153 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:39:20,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:20 BoogieIcfgContainer [2022-11-26 00:39:20,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:39:20,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:39:20,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:39:20,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:39:20,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:39:19" (1/3) ... [2022-11-26 00:39:20,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caae3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:20, skipping insertion in model container [2022-11-26 00:39:20,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:19" (2/3) ... [2022-11-26 00:39:20,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caae3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:20, skipping insertion in model container [2022-11-26 00:39:20,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:20" (3/3) ... [2022-11-26 00:39:20,181 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2022-11-26 00:39:20,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:39:20,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-26 00:39:20,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:39:20,274 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;@68e9e7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:39:20,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-26 00:39:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:39:20,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:20,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:20,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2086838875, now seen corresponding path program 1 times [2022-11-26 00:39:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402764786] [2022-11-26 00:39:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:20,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402764786] [2022-11-26 00:39:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402764786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:20,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:20,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:39:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250347262] [2022-11-26 00:39:20,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:39:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:39:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:20,881 INFO L87 Difference]: Start difference. First operand has 45 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:20,992 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-11-26 00:39:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:39:20,995 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2022-11-26 00:39:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:21,004 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:39:21,005 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:39:21,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:21,013 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:21,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:39:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-26 00:39:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-11-26 00:39:21,075 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 7 [2022-11-26 00:39:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:21,078 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-11-26 00:39:21,078 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-11-26 00:39:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:39:21,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:21,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:21,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:39:21,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:21,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2086838876, now seen corresponding path program 1 times [2022-11-26 00:39:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905497243] [2022-11-26 00:39:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:21,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:21,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905497243] [2022-11-26 00:39:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905497243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:39:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857006292] [2022-11-26 00:39:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:39:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:39:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:39:21,701 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:21,922 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-11-26 00:39:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:21,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2022-11-26 00:39:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:21,924 INFO L225 Difference]: With dead ends: 59 [2022-11-26 00:39:21,924 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 00:39:21,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:39:21,926 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:21,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 00:39:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-11-26 00:39:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 40 states have internal predecessors, (46), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:39:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-26 00:39:21,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 7 [2022-11-26 00:39:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:21,937 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-26 00:39:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-26 00:39:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:39:21,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:21,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:39:21,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 267495675, now seen corresponding path program 1 times [2022-11-26 00:39:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:21,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433408573] [2022-11-26 00:39:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:22,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433408573] [2022-11-26 00:39:22,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433408573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:22,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:22,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:39:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954805269] [2022-11-26 00:39:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:22,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:39:22,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:39:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:22,318 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:22,526 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-11-26 00:39:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:22,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2022-11-26 00:39:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:22,528 INFO L225 Difference]: With dead ends: 58 [2022-11-26 00:39:22,528 INFO L226 Difference]: Without dead ends: 58 [2022-11-26 00:39:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:39:22,530 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:22,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 65 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-26 00:39:22,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-26 00:39:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.46875) internal successors, (47), 41 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:39:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-11-26 00:39:22,539 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 8 [2022-11-26 00:39:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:22,540 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-11-26 00:39:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-11-26 00:39:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:39:22,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:22,541 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:39:22,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -546459835, now seen corresponding path program 1 times [2022-11-26 00:39:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952307320] [2022-11-26 00:39:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:22,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:22,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952307320] [2022-11-26 00:39:22,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952307320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:22,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:22,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:39:22,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552315528] [2022-11-26 00:39:22,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:22,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:39:22,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:39:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:39:22,854 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:23,132 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-11-26 00:39:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 10 [2022-11-26 00:39:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:23,137 INFO L225 Difference]: With dead ends: 65 [2022-11-26 00:39:23,138 INFO L226 Difference]: Without dead ends: 65 [2022-11-26 00:39:23,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:23,148 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:23,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 70 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-26 00:39:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2022-11-26 00:39:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:39:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-11-26 00:39:23,172 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 10 [2022-11-26 00:39:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:23,173 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-11-26 00:39:23,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-11-26 00:39:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:39:23,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:23,175 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:23,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:39:23,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash -634611917, now seen corresponding path program 1 times [2022-11-26 00:39:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424852257] [2022-11-26 00:39:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:23,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:23,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424852257] [2022-11-26 00:39:23,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424852257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:23,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653901755] [2022-11-26 00:39:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:23,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:23,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:39:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:39:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:23,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:39:23,884 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 58 [2022-11-26 00:39:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:23,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:24,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-26 00:39:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653901755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462198484] [2022-11-26 00:39:24,555 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:39:24,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:24,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:24,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:24,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:24,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:39:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:24,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:39:25,295 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2022-11-26 00:39:25,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:26,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '559#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (<= 0 |ULTIMATE.start_main_#t~malloc6#1.offset|) (<= |ULTIMATE.start_main_~y~0#1| 2147483646) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0))' at error location [2022-11-26 00:39:26,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:26,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:26,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-26 00:39:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574992758] [2022-11-26 00:39:26,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:26,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:39:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:39:26,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:39:26,472 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:27,178 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-26 00:39:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:39:27,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-26 00:39:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:27,180 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:39:27,180 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 00:39:27,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:39:27,181 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:27,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 86 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:39:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 00:39:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2022-11-26 00:39:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.375) internal successors, (44), 38 states have internal predecessors, (44), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:39:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-26 00:39:27,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 10 [2022-11-26 00:39:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:27,190 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-26 00:39:27,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-26 00:39:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:39:27,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:27,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:27,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:27,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:27,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:27,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1801867012, now seen corresponding path program 1 times [2022-11-26 00:39:27,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:27,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242505965] [2022-11-26 00:39:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:27,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242505965] [2022-11-26 00:39:27,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242505965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117376388] [2022-11-26 00:39:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:27,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:27,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:27,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:39:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:39:27,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:27,711 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 48 treesize of output 32 [2022-11-26 00:39:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:27,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:39:27,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117376388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:27,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:39:27,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-26 00:39:27,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599955881] [2022-11-26 00:39:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:27,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:27,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:39:27,791 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:27,926 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-11-26 00:39:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-26 00:39:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:27,928 INFO L225 Difference]: With dead ends: 59 [2022-11-26 00:39:27,928 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 00:39:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:39:27,929 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:27,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 00:39:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-11-26 00:39:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.34375) internal successors, (43), 37 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:39:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-26 00:39:27,936 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 11 [2022-11-26 00:39:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:27,937 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-26 00:39:27,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-26 00:39:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:39:27,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:27,938 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:27,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:28,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:28,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash 810612494, now seen corresponding path program 1 times [2022-11-26 00:39:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177745405] [2022-11-26 00:39:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:28,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177745405] [2022-11-26 00:39:28,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177745405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655397291] [2022-11-26 00:39:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:28,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:28,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:39:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:39:28,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:28,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:28,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-26 00:39:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:28,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655397291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012503413] [2022-11-26 00:39:28,889 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:39:28,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:28,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:28,890 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:28,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:28,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:39:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:29,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:39:29,486 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 74 for LOIs [2022-11-26 00:39:29,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:30,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483648)) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (not (= (ite (and (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|)) 1 0) 0)) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934592)) (<= |ULTIMATE.start_main_~y~0#1| 2147483646) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 2147483649 |ULTIMATE.start_main_~y~0#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:30,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:30,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:30,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-26 00:39:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528731922] [2022-11-26 00:39:30,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:39:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:39:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:39:30,902 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:31,248 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-26 00:39:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:39:31,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 13 [2022-11-26 00:39:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:31,250 INFO L225 Difference]: With dead ends: 72 [2022-11-26 00:39:31,250 INFO L226 Difference]: Without dead ends: 72 [2022-11-26 00:39:31,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:39:31,251 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:31,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 75 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-26 00:39:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2022-11-26 00:39:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:39:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-26 00:39:31,257 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 13 [2022-11-26 00:39:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:31,257 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-26 00:39:31,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-26 00:39:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:39:31,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:31,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:31,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:31,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:39:31,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -784096684, now seen corresponding path program 1 times [2022-11-26 00:39:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:31,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493534244] [2022-11-26 00:39:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:31,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:31,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493534244] [2022-11-26 00:39:31,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493534244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:31,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:31,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:39:31,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987233384] [2022-11-26 00:39:31,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:31,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:39:31,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:39:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:39:31,684 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:31,844 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-11-26 00:39:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:39:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-26 00:39:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:31,845 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:39:31,845 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:39:31,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:39:31,847 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:31,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 66 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:39:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-26 00:39:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:39:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-26 00:39:31,851 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 15 [2022-11-26 00:39:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:31,852 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-26 00:39:31,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-26 00:39:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:39:31,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:31,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:39:31,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash -640816486, now seen corresponding path program 1 times [2022-11-26 00:39:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035669824] [2022-11-26 00:39:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:32,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035669824] [2022-11-26 00:39:32,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035669824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554802002] [2022-11-26 00:39:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:32,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:32,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:32,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:39:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:39:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:32,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:39:32,365 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 58 [2022-11-26 00:39:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:32,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-26 00:39:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554802002] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:32,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:39:32,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 14 [2022-11-26 00:39:32,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022229918] [2022-11-26 00:39:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:39:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:39:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:39:32,829 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,063 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-26 00:39:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-26 00:39:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,064 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:39:33,064 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:39:33,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:39:33,066 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:39:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-26 00:39:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-11-26 00:39:33,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 14 [2022-11-26 00:39:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:33,071 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-11-26 00:39:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:39:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-11-26 00:39:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:39:33,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:33,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:33,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:39:33,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1652056848, now seen corresponding path program 1 times [2022-11-26 00:39:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904653293] [2022-11-26 00:39:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:33,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904653293] [2022-11-26 00:39:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904653293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:39:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697759102] [2022-11-26 00:39:33,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:33,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:39:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:39:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:33,332 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,363 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-26 00:39:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:39:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-11-26 00:39:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,365 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:39:33,365 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:39:33,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:33,366 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:39:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-26 00:39:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-26 00:39:33,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 20 [2022-11-26 00:39:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:33,371 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-26 00:39:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-26 00:39:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:39:33,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:33,372 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:39:33,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1511265485, now seen corresponding path program 1 times [2022-11-26 00:39:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:33,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066702987] [2022-11-26 00:39:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:33,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:33,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066702987] [2022-11-26 00:39:33,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066702987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:33,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:33,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:39:33,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082540447] [2022-11-26 00:39:33,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:33,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:39:33,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:39:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:39:33,480 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,539 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-26 00:39:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:33,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-26 00:39:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,541 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:39:33,541 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:39:33,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:33,543 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:39:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-26 00:39:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-26 00:39:33,546 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2022-11-26 00:39:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:33,549 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-26 00:39:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-26 00:39:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:39:33,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:33,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:39:33,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 657728550, now seen corresponding path program 1 times [2022-11-26 00:39:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308209907] [2022-11-26 00:39:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:33,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:33,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:33,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308209907] [2022-11-26 00:39:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308209907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:33,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:33,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:39:33,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434124776] [2022-11-26 00:39:33,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:33,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:39:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:39:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:39:33,784 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,912 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-26 00:39:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:39:33,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-26 00:39:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,913 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:39:33,913 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:39:33,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:39:33,914 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:39:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-26 00:39:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-26 00:39:33,917 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-11-26 00:39:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:33,918 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-26 00:39:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:39:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-26 00:39:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:39:33,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:33,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:39:33,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1910572811, now seen corresponding path program 1 times [2022-11-26 00:39:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666728471] [2022-11-26 00:39:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:33,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:34,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:34,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666728471] [2022-11-26 00:39:34,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666728471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:34,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409276756] [2022-11-26 00:39:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:34,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:34,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:34,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:39:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:39:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:34,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:39:34,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409276756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:34,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:39:34,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-26 00:39:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188573346] [2022-11-26 00:39:34,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:34,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:39:34,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:39:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:39:34,235 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:39:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:34,359 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-26 00:39:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:34,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-26 00:39:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:34,361 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:39:34,361 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:39:34,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:39:34,362 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:34,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:39:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-11-26 00:39:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:39:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-26 00:39:34,366 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2022-11-26 00:39:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:34,366 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-26 00:39:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:39:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-26 00:39:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:39:34,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:34,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:34,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:34,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 736579220, now seen corresponding path program 1 times [2022-11-26 00:39:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:34,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840998588] [2022-11-26 00:39:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:34,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840998588] [2022-11-26 00:39:34,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840998588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329670710] [2022-11-26 00:39:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:34,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:34,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:39:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:39:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:39:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:35,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-26 00:39:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329670710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889729202] [2022-11-26 00:39:35,557 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:39:35,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:35,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:35,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:35,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:35,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:39:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:35,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:39:38,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:39:38,061 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 74 for LOIs [2022-11-26 00:39:38,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:41,772 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1926#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483648)) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934592)) (<= |ULTIMATE.start_main_~y~0#1| 2147483646) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 (+ 2147483649 |ULTIMATE.start_main_~y~0#1|)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:41,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:41,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:41,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2022-11-26 00:39:41,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996385528] [2022-11-26 00:39:41,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:41,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:39:41,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:39:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:39:41,776 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:39:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:42,531 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-26 00:39:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:39:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 31 [2022-11-26 00:39:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:42,533 INFO L225 Difference]: With dead ends: 62 [2022-11-26 00:39:42,533 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 00:39:42,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=345, Invalid=2105, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:39:42,535 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:42,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 80 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:39:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 00:39:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2022-11-26 00:39:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:39:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-26 00:39:42,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2022-11-26 00:39:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:42,541 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-26 00:39:42,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:39:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-26 00:39:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:39:42,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:42,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:42,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:42,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:39:42,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-26 00:39:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash 774255000, now seen corresponding path program 2 times [2022-11-26 00:39:42,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:42,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597943693] [2022-11-26 00:39:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:39:43,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597943693] [2022-11-26 00:39:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597943693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710009022] [2022-11-26 00:39:43,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:39:43,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:43,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:43,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:39:43,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:39:43,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:39:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:43,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:39:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:39:45,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:39:45,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710009022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:45,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307978557] [2022-11-26 00:39:45,810 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:39:45,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:45,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:45,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:45,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:45,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:39:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:45,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:39:47,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2022-11-26 00:39:47,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 74 for LOIs [2022-11-26 00:39:47,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:57,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2322#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483648)) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934592)) (<= |ULTIMATE.start_main_~y~0#1| 2147483646) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 2147483649 |ULTIMATE.start_main_~y~0#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:57,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:57,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:57,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 24 [2022-11-26 00:39:57,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372135059] [2022-11-26 00:39:57,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:39:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:39:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1774, Unknown=1, NotChecked=0, Total=1980 [2022-11-26 00:39:57,849 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-26 00:39:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:59,250 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-11-26 00:39:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:39:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) Word has length 40 [2022-11-26 00:39:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:59,252 INFO L225 Difference]: With dead ends: 55 [2022-11-26 00:39:59,252 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:39:59,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=415, Invalid=2890, Unknown=1, NotChecked=0, Total=3306 [2022-11-26 00:39:59,254 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:59,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:39:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:39:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:39:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-26 00:39:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:39:59,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2022-11-26 00:39:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:59,257 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:39:59,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-26 00:39:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:39:59,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:39:59,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-11-26 00:39:59,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-11-26 00:39:59,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-11-26 00:39:59,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-11-26 00:39:59,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2022-11-26 00:39:59,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2022-11-26 00:39:59,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2022-11-26 00:39:59,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2022-11-26 00:39:59,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-11-26 00:39:59,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-11-26 00:39:59,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-11-26 00:39:59,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-11-26 00:39:59,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (4 of 17 remaining) [2022-11-26 00:39:59,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (3 of 17 remaining) [2022-11-26 00:39:59,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (2 of 17 remaining) [2022-11-26 00:39:59,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (1 of 17 remaining) [2022-11-26 00:39:59,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-11-26 00:39:59,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:39:59,474 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:59,477 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:39:59,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:39:59 BoogieIcfgContainer [2022-11-26 00:39:59,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:39:59,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:39:59,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:39:59,487 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:39:59,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:20" (3/4) ... [2022-11-26 00:39:59,492 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:39:59,499 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-26 00:39:59,499 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-26 00:39:59,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2022-11-26 00:39:59,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-11-26 00:39:59,508 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:39:59,508 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:39:59,561 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:39:59,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:39:59,562 INFO L158 Benchmark]: Toolchain (without parser) took 40462.20ms. Allocated memory was 132.1MB in the beginning and 293.6MB in the end (delta: 161.5MB). Free memory was 94.6MB in the beginning and 126.3MB in the end (delta: -31.7MB). Peak memory consumption was 130.0MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,562 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 132.1MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:39:59,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 324.30ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 84.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,568 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.38ms. Allocated memory is still 132.1MB. Free memory was 84.1MB in the beginning and 82.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:39:59,569 INFO L158 Benchmark]: Boogie Preprocessor took 65.19ms. Allocated memory is still 132.1MB. Free memory was 82.3MB in the beginning and 81.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,569 INFO L158 Benchmark]: RCFGBuilder took 619.89ms. Allocated memory is still 132.1MB. Free memory was 80.8MB in the beginning and 64.6MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,570 INFO L158 Benchmark]: TraceAbstraction took 39314.43ms. Allocated memory was 132.1MB in the beginning and 293.6MB in the end (delta: 161.5MB). Free memory was 64.1MB in the beginning and 130.1MB in the end (delta: -66.1MB). Peak memory consumption was 98.6MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,570 INFO L158 Benchmark]: Witness Printer took 75.00ms. Allocated memory is still 293.6MB. Free memory was 130.1MB in the beginning and 126.3MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:39:59,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 132.1MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 324.30ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 84.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.38ms. Allocated memory is still 132.1MB. Free memory was 84.1MB in the beginning and 82.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 65.19ms. Allocated memory is still 132.1MB. Free memory was 82.3MB in the beginning and 81.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 619.89ms. Allocated memory is still 132.1MB. Free memory was 80.8MB in the beginning and 64.6MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 39314.43ms. Allocated memory was 132.1MB in the beginning and 293.6MB in the end (delta: 161.5MB). Free memory was 64.1MB in the beginning and 130.1MB in the end (delta: -66.1MB). Peak memory consumption was 98.6MB. Max. memory is 16.1GB. * Witness Printer took 75.00ms. Allocated memory is still 293.6MB. Free memory was 130.1MB in the beginning and 126.3MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 39.2s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 811 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 787 mSDsluCounter, 893 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 608 mSDsCounter, 241 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1975 IncrementalHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 241 mSolverCounterUnsat, 285 mSDtfsCounter, 1975 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 473 GetRequests, 230 SyntacticMatches, 12 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 21.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=4, InterpolantAutomatonStates: 112, 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, 15 MinimizatonAttempts, 123 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 407 NumberOfCodeBlocks, 395 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 488 ConstructedInterpolants, 30 QuantifiedInterpolants, 4764 SizeOfPredicates, 50 NumberOfNonLiveVariables, 766 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 116/157 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 - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-26 00:39:59,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03deaa94-d737-4437-b306-756ceb08df61/bin/utaipan-ByfvJB40ur/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: TRUE