./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loop-acceleration/array_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1476526c0a7c864e0f43f0a8231ffd3d7c324e1f397c219fdbe228643d49425 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:10:50,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:10:50,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:10:50,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:10:50,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:10:50,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:10:50,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:10:50,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:10:50,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:10:50,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:10:50,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:10:50,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:10:50,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:10:50,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:10:50,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:10:50,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:10:50,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:10:50,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:10:50,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:10:50,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:10:50,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:10:50,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:10:50,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:10:50,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:10:50,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:10:50,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:10:50,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:10:50,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:10:50,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:10:50,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:10:50,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:10:50,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:10:50,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:10:50,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:10:50,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:10:50,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:10:50,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:10:50,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:10:50,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:10:50,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:10:50,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:10:50,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 03:10:50,639 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:10:50,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:10:50,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:10:50,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:10:50,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:10:50,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:10:50,640 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:10:50,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:10:50,641 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:10:50,642 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:10:50,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:10:50,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:10:50,642 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:10:50,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 03:10:50,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 03:10:50,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:10:50,643 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:10:50,643 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 03:10:50,644 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:10:50,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:10:50,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:10:50,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:10:50,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:10:50,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:10:50,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:10:50,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:10:50,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:10:50,646 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_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1476526c0a7c864e0f43f0a8231ffd3d7c324e1f397c219fdbe228643d49425 [2022-12-14 03:10:50,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:10:50,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:10:50,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:10:50,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:10:50,855 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:10:50,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2022-12-14 03:10:53,481 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:10:53,593 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:10:53,593 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/sv-benchmarks/c/loop-acceleration/array_1-2.c [2022-12-14 03:10:53,597 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/data/67c784b8f/8dfbaf7383c74241a2fb2b8da07c4363/FLAG5aa24da55 [2022-12-14 03:10:53,608 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/data/67c784b8f/8dfbaf7383c74241a2fb2b8da07c4363 [2022-12-14 03:10:53,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:10:53,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:10:53,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:10:53,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:10:53,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:10:53,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee0ea89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53, skipping insertion in model container [2022-12-14 03:10:53,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:10:53,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:10:53,730 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_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2022-12-14 03:10:53,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:10:53,747 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:10:53,756 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_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2022-12-14 03:10:53,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:10:53,769 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:10:53,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53 WrapperNode [2022-12-14 03:10:53,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:10:53,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:10:53,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:10:53,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:10:53,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,793 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-12-14 03:10:53,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:10:53,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:10:53,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:10:53,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:10:53,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:10:53,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:10:53,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:10:53,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:10:53,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (1/1) ... [2022-12-14 03:10:53,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:10:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:53,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:10:53,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:10:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:10:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:10:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 03:10:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 03:10:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:10:53,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:10:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 03:10:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 03:10:53,929 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:10:53,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:10:54,014 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:10:54,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:10:54,039 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 03:10:54,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:10:54 BoogieIcfgContainer [2022-12-14 03:10:54,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:10:54,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:10:54,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:10:54,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:10:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:10:53" (1/3) ... [2022-12-14 03:10:54,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db30e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:10:54, skipping insertion in model container [2022-12-14 03:10:54,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:10:53" (2/3) ... [2022-12-14 03:10:54,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db30e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:10:54, skipping insertion in model container [2022-12-14 03:10:54,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:10:54" (3/3) ... [2022-12-14 03:10:54,048 INFO L112 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2022-12-14 03:10:54,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:10:54,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 03:10:54,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:10:54,116 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;@b8535be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:10:54,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 03:10:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 8 states have (on average 2.0) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:10:54,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:54,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:10:54,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash 67592, now seen corresponding path program 1 times [2022-12-14 03:10:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:54,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087012362] [2022-12-14 03:10:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:54,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087012362] [2022-12-14 03:10:54,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087012362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:54,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:10:54,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:10:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161061779] [2022-12-14 03:10:54,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:54,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:10:54,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:10:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:10:54,331 INFO L87 Difference]: Start difference. First operand has 15 states, 8 states have (on average 2.0) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:54,361 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-12-14 03:10:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:10:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:10:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:54,371 INFO L225 Difference]: With dead ends: 13 [2022-12-14 03:10:54,371 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 03:10:54,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:10:54,377 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:54,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 03:10:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 03:10:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.5) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-12-14 03:10:54,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2022-12-14 03:10:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:54,406 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-12-14 03:10:54,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-12-14 03:10:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:10:54,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:54,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:10:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:10:54,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 67593, now seen corresponding path program 1 times [2022-12-14 03:10:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:54,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998684262] [2022-12-14 03:10:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:54,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998684262] [2022-12-14 03:10:54,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998684262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:54,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:10:54,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:10:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860404178] [2022-12-14 03:10:54,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:10:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:10:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:10:54,512 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:54,531 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-12-14 03:10:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:10:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:10:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:54,532 INFO L225 Difference]: With dead ends: 14 [2022-12-14 03:10:54,533 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 03:10:54,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:10:54,534 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:54,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 03:10:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 03:10:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-12-14 03:10:54,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 3 [2022-12-14 03:10:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:54,537 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-12-14 03:10:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-12-14 03:10:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 03:10:54,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:54,538 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 03:10:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:10:54,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 64981221, now seen corresponding path program 1 times [2022-12-14 03:10:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:54,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535535994] [2022-12-14 03:10:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:54,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535535994] [2022-12-14 03:10:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535535994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309540423] [2022-12-14 03:10:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:54,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:54,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:10:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 03:10:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:54,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 03:10:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:54,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309540423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459799149] [2022-12-14 03:10:54,858 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 03:10:54,858 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:54,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:54,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:54,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:10:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:54,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:54,920 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 22 treesize of output 30 [2022-12-14 03:10:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:10:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:10:55,093 INFO L321 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2022-12-14 03:10:55,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 213 [2022-12-14 03:10:55,175 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 18 treesize of output 14 [2022-12-14 03:10:55,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:10:55,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '110#(and (< |ULTIMATE.start_main_~i~0#1| 1024) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 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|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:10:55,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:10:55,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:10:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 03:10:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506416973] [2022-12-14 03:10:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:10:55,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 03:10:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 03:10:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 03:10:55,251 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:55,319 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-12-14 03:10:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:10:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 03:10:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:55,321 INFO L225 Difference]: With dead ends: 15 [2022-12-14 03:10:55,321 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 03:10:55,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-14 03:10:55,323 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:55,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 03:10:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 03:10:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-12-14 03:10:55,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2022-12-14 03:10:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:55,327 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-12-14 03:10:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-12-14 03:10:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 03:10:55,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:55,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-12-14 03:10:55,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:10:55,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:55,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1069807290, now seen corresponding path program 1 times [2022-12-14 03:10:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22600384] [2022-12-14 03:10:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:55,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22600384] [2022-12-14 03:10:55,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22600384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17737420] [2022-12-14 03:10:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:55,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:55,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:10:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 03:10:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:55,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:55,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17737420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:55,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247452673] [2022-12-14 03:10:55,711 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 03:10:55,712 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:55,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:55,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:55,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:10:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,731 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 22 treesize of output 30 [2022-12-14 03:10:55,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-12-14 03:10:55,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:55,811 INFO L321 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2022-12-14 03:10:55,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 214 [2022-12-14 03:10:55,850 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 18 treesize of output 14 [2022-12-14 03:10:55,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:10:56,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 1024 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= 1023 |ULTIMATE.start_main_#t~mem5#1|) 1 0)) (= (select |#valid| |ULTIMATE.start_main_~#A~0#1.base|) 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ 4092 |ULTIMATE.start_main_~#A~0#1.offset|))) (<= (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096) (select |#length| |ULTIMATE.start_main_~#A~0#1.base|)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:10:56,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:10:56,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:10:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-14 03:10:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952836969] [2022-12-14 03:10:56,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:10:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:10:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:10:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:10:56,008 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:56,037 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-12-14 03:10:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 03:10:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 03:10:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:56,038 INFO L225 Difference]: With dead ends: 25 [2022-12-14 03:10:56,038 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 03:10:56,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:10:56,039 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:56,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 03:10:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 03:10:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-12-14 03:10:56,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 11 [2022-12-14 03:10:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:56,042 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-12-14 03:10:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-12-14 03:10:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 03:10:56,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:56,043 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2022-12-14 03:10:56,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 03:10:56,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:56,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash -52877050, now seen corresponding path program 2 times [2022-12-14 03:10:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:56,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645671703] [2022-12-14 03:10:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:56,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645671703] [2022-12-14 03:10:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645671703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429756014] [2022-12-14 03:10:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:10:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:56,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:10:56,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:10:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:10:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 03:10:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:56,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 03:10:56,648 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 03:10:56,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-12-14 03:10:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 03:10:56,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:10:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429756014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:56,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:10:56,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-12-14 03:10:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304024327] [2022-12-14 03:10:56,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:10:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:10:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:10:56,666 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:58,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:10:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:58,759 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-12-14 03:10:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:10:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 03:10:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:58,760 INFO L225 Difference]: With dead ends: 23 [2022-12-14 03:10:58,760 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 03:10:58,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-12-14 03:10:58,761 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:58,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 03:10:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 03:10:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 03:10:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-12-14 03:10:58,764 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-12-14 03:10:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:58,765 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-12-14 03:10:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-12-14 03:10:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 03:10:58,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:58,766 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:58,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:10:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:58,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1639183524, now seen corresponding path program 1 times [2022-12-14 03:10:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169064721] [2022-12-14 03:10:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:59,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169064721] [2022-12-14 03:10:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169064721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670726641] [2022-12-14 03:10:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:59,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:59,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:10:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 03:10:59,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:59,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:10:59,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670726641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393367326] [2022-12-14 03:10:59,346 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:10:59,346 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:59,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:59,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:59,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:10:59,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:59,364 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 22 treesize of output 30 [2022-12-14 03:10:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:59,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:10:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:10:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:10:59,467 INFO L321 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2022-12-14 03:10:59,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 213 [2022-12-14 03:10:59,542 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 18 treesize of output 14 [2022-12-14 03:10:59,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 03:10:59,563 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:10:59,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '547#(and (exists ((|v_ULTIMATE.start_main_~#A~0#1.base_17| Int)) (and (<= 4096 (select |#length| |v_ULTIMATE.start_main_~#A~0#1.base_17|)) (= (ite (= 1023 (select (select |#memory_int| |v_ULTIMATE.start_main_~#A~0#1.base_17|) 4092)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select |#valid| |v_ULTIMATE.start_main_~#A~0#1.base_17|) 0) (<= 0 |v_ULTIMATE.start_main_~#A~0#1.base_17|))) (<= 1024 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:10:59,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:10:59,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:10:59,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-12-14 03:10:59,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294824418] [2022-12-14 03:10:59,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:10:59,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 03:10:59,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 03:10:59,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2022-12-14 03:10:59,726 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:59,778 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-12-14 03:10:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:10:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 03:10:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:59,779 INFO L225 Difference]: With dead ends: 43 [2022-12-14 03:10:59,779 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 03:10:59,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2022-12-14 03:10:59,780 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:59,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 03:10:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 03:10:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-12-14 03:10:59,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 22 [2022-12-14 03:10:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:59,784 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-12-14 03:10:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-12-14 03:10:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 03:10:59,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:59,784 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:59,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:10:59,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:59,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 03:10:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 223487684, now seen corresponding path program 2 times [2022-12-14 03:10:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487255096] [2022-12-14 03:10:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:11:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:11:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:11:00,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:11:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487255096] [2022-12-14 03:11:00,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487255096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:11:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814027566] [2022-12-14 03:11:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:11:00,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:11:00,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:11:00,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:11:00,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:11:00,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 03:11:00,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:11:00,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:11:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:11:00,650 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#A~0#1.base_18| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#A~0#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#A~0#1.base_18|) 0))) is different from true [2022-12-14 03:11:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-14 03:11:00,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:11:00,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814027566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:11:00,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:11:00,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [20] total 22 [2022-12-14 03:11:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925766981] [2022-12-14 03:11:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:11:00,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:11:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:11:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:11:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=251, Unknown=1, NotChecked=40, Total=506 [2022-12-14 03:11:00,652 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:11:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:11:00,660 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-12-14 03:11:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:11:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 03:11:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:11:00,661 INFO L225 Difference]: With dead ends: 42 [2022-12-14 03:11:00,661 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 03:11:00,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=251, Unknown=1, NotChecked=40, Total=506 [2022-12-14 03:11:00,661 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:11:00,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-12-14 03:11:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 03:11:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 03:11:00,662 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) [2022-12-14 03:11:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 03:11:00,662 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2022-12-14 03:11:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:11:00,662 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 03:11:00,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:11:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 03:11:00,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 03:11:00,664 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2022-12-14 03:11:00,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2022-12-14 03:11:00,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-12-14 03:11:00,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-12-14 03:11:00,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-12-14 03:11:00,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-14 03:11:00,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:11:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:11:00,870 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-12-14 03:11:00,872 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 03:11:00,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:11:00 BoogieIcfgContainer [2022-12-14 03:11:00,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 03:11:00,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 03:11:00,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 03:11:00,876 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 03:11:00,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:10:54" (3/4) ... [2022-12-14 03:11:00,880 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 03:11:00,893 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-12-14 03:11:00,893 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 03:11:00,893 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 03:11:00,894 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 03:11:00,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 03:11:00,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 03:11:00,957 INFO L158 Benchmark]: Toolchain (without parser) took 7344.82ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 100.1MB in the beginning and 90.5MB in the end (delta: 9.6MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,958 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:11:00,958 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.89ms. Allocated memory is still 138.4MB. Free memory was 100.1MB in the beginning and 90.1MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.20ms. Allocated memory is still 138.4MB. Free memory was 90.1MB in the beginning and 88.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:11:00,959 INFO L158 Benchmark]: Boogie Preprocessor took 15.83ms. Allocated memory is still 138.4MB. Free memory was 88.7MB in the beginning and 87.5MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,960 INFO L158 Benchmark]: RCFGBuilder took 231.56ms. Allocated memory is still 138.4MB. Free memory was 87.5MB in the beginning and 76.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,961 INFO L158 Benchmark]: TraceAbstraction took 6831.48ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 75.8MB in the beginning and 93.6MB in the end (delta: -17.8MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,961 INFO L158 Benchmark]: Witness Printer took 80.52ms. Allocated memory is still 167.8MB. Free memory was 93.6MB in the beginning and 90.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 03:11:00,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 156.89ms. Allocated memory is still 138.4MB. Free memory was 100.1MB in the beginning and 90.1MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.20ms. Allocated memory is still 138.4MB. Free memory was 90.1MB in the beginning and 88.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.83ms. Allocated memory is still 138.4MB. Free memory was 88.7MB in the beginning and 87.5MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 231.56ms. Allocated memory is still 138.4MB. Free memory was 87.5MB in the beginning and 76.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6831.48ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 75.8MB in the beginning and 93.6MB in the end (delta: -17.8MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. * Witness Printer took 80.52ms. Allocated memory is still 167.8MB. Free memory was 93.6MB in the beginning and 90.5MB in the end (delta: 3.1MB). 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: 7]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 12]: 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 1 procedures, 15 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 7, TraceHistogramMax: 18, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 6 IncrementalHoareTripleChecker+Unchecked, 46 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 159 IncrementalHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 27 mSDtfsCounter, 159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 208 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 231 ConstructedInterpolants, 43 QuantifiedInterpolants, 1208 SizeOfPredicates, 6 NumberOfNonLiveVariables, 416 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 388/1001 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 03:11:01,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfb1fd7-b85d-4f1a-80c4-af91c70b9cea/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE