./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1c73403384a361e15608c077b8e86297621fa69c42f15894e841079f64af74a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:57:18,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:57:18,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:57:18,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:57:18,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:57:18,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:57:18,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:57:18,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:57:18,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:57:18,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:57:18,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:57:18,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:57:18,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:57:18,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:57:18,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:57:18,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:57:18,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:57:18,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:57:18,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:57:18,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:57:18,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:57:18,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:57:18,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:57:18,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:57:18,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:57:18,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:57:18,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:57:18,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:57:18,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:57:18,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:57:18,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:57:18,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:57:18,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:57:18,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:57:18,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:57:18,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:57:18,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:57:18,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:57:18,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:57:18,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:57:18,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:57:18,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:57:18,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:57:18,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:57:18,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:57:18,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:57:18,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:57:18,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:57:18,616 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:57:18,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:57:18,617 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:57:18,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:57:18,618 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:57:18,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:57:18,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:57:18,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:57:18,619 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:57:18,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:57:18,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:57:18,619 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:57:18,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:57:18,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:57:18,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:57:18,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:57:18,622 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:57:18,622 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:57:18,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:57:18,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:57:18,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:57:18,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:57:18,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:57:18,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:57:18,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:57:18,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:57:18,624 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:57:18,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:57:18,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:57:18,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:57:18,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:57:18,625 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_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c73403384a361e15608c077b8e86297621fa69c42f15894e841079f64af74a [2022-11-25 23:57:18,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:57:18,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:57:18,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:57:18,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:57:18,924 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:57:18,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2022-11-25 23:57:21,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:57:22,276 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:57:22,277 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2022-11-25 23:57:22,283 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/data/f2811e5ea/0f7075c047584b3594dc9f15207e9a92/FLAGcacbd843d [2022-11-25 23:57:22,306 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/data/f2811e5ea/0f7075c047584b3594dc9f15207e9a92 [2022-11-25 23:57:22,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:57:22,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:57:22,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:57:22,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:57:22,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:57:22,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e337b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22, skipping insertion in model container [2022-11-25 23:57:22,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:57:22,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:57:22,559 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_99777a01-57f4-446b-a386-f9740c4a2646/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2022-11-25 23:57:22,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:57:22,601 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:57:22,617 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_99777a01-57f4-446b-a386-f9740c4a2646/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2022-11-25 23:57:22,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:57:22,648 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:57:22,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22 WrapperNode [2022-11-25 23:57:22,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:57:22,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:57:22,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:57:22,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:57:22,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,694 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2022-11-25 23:57:22,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:57:22,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:57:22,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:57:22,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:57:22,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:57:22,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:57:22,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:57:22,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:57:22,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (1/1) ... [2022-11-25 23:57:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:57:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:22,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:57:22,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:57:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:57:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:57:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:57:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:57:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:57:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:57:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:57:22,920 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:57:22,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:57:23,062 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:57:23,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:57:23,098 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:57:23,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:57:23 BoogieIcfgContainer [2022-11-25 23:57:23,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:57:23,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:57:23,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:57:23,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:57:23,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:57:22" (1/3) ... [2022-11-25 23:57:23,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521e2a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:57:23, skipping insertion in model container [2022-11-25 23:57:23,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:22" (2/3) ... [2022-11-25 23:57:23,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521e2a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:57:23, skipping insertion in model container [2022-11-25 23:57:23,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:57:23" (3/3) ... [2022-11-25 23:57:23,112 INFO L112 eAbstractionObserver]: Analyzing ICFG veris.c_NetBSD-libc_loop.i [2022-11-25 23:57:23,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:57:23,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 23:57:23,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:57:23,254 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;@319eb16c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:57:23,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 23:57:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:57:23,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:23,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:57:23,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash 67645, now seen corresponding path program 1 times [2022-11-25 23:57:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:23,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306485248] [2022-11-25 23:57:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:23,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:23,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306485248] [2022-11-25 23:57:23,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306485248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:23,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:23,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:57:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745828343] [2022-11-25 23:57:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:23,869 INFO L87 Difference]: Start difference. First operand has 12 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) 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) [2022-11-25 23:57:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:23,910 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-11-25 23:57:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 [2022-11-25 23:57:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:23,921 INFO L225 Difference]: With dead ends: 20 [2022-11-25 23:57:23,921 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 23:57:23,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:23,927 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:23,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 23:57:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2022-11-25 23:57:23,961 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) [2022-11-25 23:57:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-25 23:57:23,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2022-11-25 23:57:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:23,964 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-25 23:57:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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) [2022-11-25 23:57:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-25 23:57:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:57:23,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:23,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:57:23,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:57:23,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2065607, now seen corresponding path program 1 times [2022-11-25 23:57:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757652011] [2022-11-25 23:57:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:24,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757652011] [2022-11-25 23:57:24,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757652011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:24,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:24,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182958329] [2022-11-25 23:57:24,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:57:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:57:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:57:24,200 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:24,261 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-25 23:57:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:57:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:57:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:24,264 INFO L225 Difference]: With dead ends: 17 [2022-11-25 23:57:24,264 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:57:24,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:57:24,266 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:24,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:57:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2022-11-25 23:57:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-25 23:57:24,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2022-11-25 23:57:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-25 23:57:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-25 23:57:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:57:24,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:24,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:57:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:57:24,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash 64038831, now seen corresponding path program 1 times [2022-11-25 23:57:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:24,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649399644] [2022-11-25 23:57:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:24,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:24,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:24,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649399644] [2022-11-25 23:57:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649399644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:24,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:24,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:57:24,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736139743] [2022-11-25 23:57:24,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:24,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:24,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:24,421 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:24,444 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-11-25 23:57:24,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:24,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:57:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:24,447 INFO L225 Difference]: With dead ends: 12 [2022-11-25 23:57:24,447 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 23:57:24,448 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 [2022-11-25 23:57:24,449 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:24,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 23:57:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 23:57:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) 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) [2022-11-25 23:57:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-25 23:57:24,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2022-11-25 23:57:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:24,452 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-25 23:57:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-25 23:57:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:57:24,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:24,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:57:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:57:24,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:24,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 64038832, now seen corresponding path program 1 times [2022-11-25 23:57:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:24,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044956283] [2022-11-25 23:57:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:24,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:24,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044956283] [2022-11-25 23:57:24,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044956283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:24,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:24,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:57:24,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758976078] [2022-11-25 23:57:24,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:24,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:24,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:24,640 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:24,669 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-25 23:57:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:57:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:24,671 INFO L225 Difference]: With dead ends: 14 [2022-11-25 23:57:24,671 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 23:57:24,672 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 [2022-11-25 23:57:24,677 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:24,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 23:57:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 23:57:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) 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) [2022-11-25 23:57:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-25 23:57:24,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2022-11-25 23:57:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:24,692 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-25 23:57:24,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-25 23:57:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:57:24,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:24,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:24,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:57:24,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1411789237, now seen corresponding path program 1 times [2022-11-25 23:57:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494882264] [2022-11-25 23:57:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:24,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494882264] [2022-11-25 23:57:24,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494882264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125527705] [2022-11-25 23:57:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:24,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:24,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:57:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:57:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125527705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809295197] [2022-11-25 23:57:25,120 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 23:57:25,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:25,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:25,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:25,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:25,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:57:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:25,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:57:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:25,881 INFO L321 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-25 23:57:25,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 300 treesize of output 297 [2022-11-25 23:57:26,083 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 13 treesize of output 9 [2022-11-25 23:57:26,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:57:26,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:26,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184#(and (exists ((|v_ULTIMATE.start_main_~#pathbuf~0#1.base_15| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#pathbuf~0#1.base_15|) 0) (<= 0 |v_ULTIMATE.start_main_~#pathbuf~0#1.base_15|))) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.base|) (= |ULTIMATE.start_glob2_#res#1| 0) (<= 0 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.offset|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.offset|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 4 ~tmp~0.offset) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (<= 4 |ULTIMATE.start_glob2_#in~pathlim#1.offset|) (<= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= |ULTIMATE.start_main_~bound~0#1.offset| 4) (<= 4 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 4 |ULTIMATE.start_main_~bound~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 4) (<= 0 |ULTIMATE.start_glob2_~pathlim#1.base|) (<= ~tmp~0.offset 4) (= |#NULL.offset| 0) (or (not (<= |ULTIMATE.start_glob2_~p~0#1.offset| |ULTIMATE.start_glob2_~pathlim#1.offset|)) (not (= |ULTIMATE.start_glob2_~p~0#1.base| |ULTIMATE.start_glob2_~pathlim#1.base|))) (<= 0 ~tmp~0.base) (<= 0 |ULTIMATE.start_main_~bound~0#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~pathlim#1.offset| 4) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:26,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:26,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-25 23:57:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971674072] [2022-11-25 23:57:26,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:57:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:57:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:57:26,931 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:26,962 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-25 23:57:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:57:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-25 23:57:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:26,964 INFO L225 Difference]: With dead ends: 15 [2022-11-25 23:57:26,965 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:57:26,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:57:26,968 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 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 [2022-11-25 23:57:26,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:57:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:57:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) 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) [2022-11-25 23:57:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-25 23:57:26,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2022-11-25 23:57:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:26,976 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-25 23:57:26,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-25 23:57:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:57:26,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:26,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:26,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:57:27,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:27,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 815761999, now seen corresponding path program 1 times [2022-11-25 23:57:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752776722] [2022-11-25 23:57:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:27,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752776722] [2022-11-25 23:57:27,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752776722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004258582] [2022-11-25 23:57:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:27,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:27,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:27,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:57:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:57:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:27,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004258582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936092757] [2022-11-25 23:57:27,473 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 23:57:27,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:27,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:27,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:27,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:27,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:57:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:27,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:57:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:57:27,882 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:57:27,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 291 treesize of output 294 [2022-11-25 23:57:28,071 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 13 treesize of output 9 [2022-11-25 23:57:28,107 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:28,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '267#(and (<= |ULTIMATE.start_glob2_~p~0#1.offset| |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.base|) (= (ite (and (= ~tmp~0.base |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~p~0#1.offset| ~tmp~0.offset)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.offset|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.offset|) (<= 4 ~tmp~0.offset) (= |ULTIMATE.start_main_~#pathbuf~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (<= 4 |ULTIMATE.start_glob2_#in~pathlim#1.offset|) (<= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= |ULTIMATE.start_main_~bound~0#1.offset| 4) (= |ULTIMATE.start_glob2_~p~0#1.base| |ULTIMATE.start_glob2_~pathlim#1.base|) (<= 4 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 4 |ULTIMATE.start_main_~bound~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 4) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~tmp~0.offset 4) (<= 0 |ULTIMATE.start_main_~#pathbuf~0#1.base|) (= |#NULL.offset| 0) (<= 0 ~tmp~0.base) (<= 0 |ULTIMATE.start_main_~bound~0#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~pathlim#1.offset| 4) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:28,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:28,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:28,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-25 23:57:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825930055] [2022-11-25 23:57:28,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:28,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:57:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:57:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:57:28,706 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:28,771 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-11-25 23:57:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:57:28,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:57:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:28,772 INFO L225 Difference]: With dead ends: 22 [2022-11-25 23:57:28,772 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 23:57:28,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:57:28,773 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:28,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 23:57:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-11-25 23:57:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 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) [2022-11-25 23:57:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-25 23:57:28,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2022-11-25 23:57:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:28,777 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-25 23:57:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-25 23:57:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:57:28,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:28,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1] [2022-11-25 23:57:28,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:28,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:57:28,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash -481176792, now seen corresponding path program 1 times [2022-11-25 23:57:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:28,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795013941] [2022-11-25 23:57:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:28,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:29,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795013941] [2022-11-25 23:57:29,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795013941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336964094] [2022-11-25 23:57:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:29,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:29,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:57:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:29,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:57:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:29,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:57:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:29,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:29,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336964094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769036472] [2022-11-25 23:57:29,302 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 23:57:29,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:29,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:29,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:29,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:29,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:29,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:57:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:29,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:57:29,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:57:29,651 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:57:29,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 291 treesize of output 294 [2022-11-25 23:57:29,796 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 13 treesize of output 9 [2022-11-25 23:57:29,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:30,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.base|) (= (ite (and (= ~tmp~0.base |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~p~0#1.offset| ~tmp~0.offset)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.offset|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.offset|) (<= 4 ~tmp~0.offset) (= |ULTIMATE.start_main_~#pathbuf~0#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (<= 4 |ULTIMATE.start_glob2_#in~pathlim#1.offset|) (<= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= |ULTIMATE.start_main_~bound~0#1.offset| 4) (= |ULTIMATE.start_glob2_~p~0#1.base| |ULTIMATE.start_glob2_~pathlim#1.base|) (<= 4 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 4 |ULTIMATE.start_main_~bound~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 4) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~tmp~0.offset 4) (<= 0 |ULTIMATE.start_main_~#pathbuf~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~bound~0#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~pathlim#1.offset| 4) (<= 0 |#StackHeapBarrier|) (< (select |#length| |ULTIMATE.start_glob2_~p~0#1.base|) (+ |ULTIMATE.start_glob2_~p~0#1.offset| 4)) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:30,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:30,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:30,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 23:57:30,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984621902] [2022-11-25 23:57:30,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:57:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:57:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:57:30,413 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:30,453 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-25 23:57:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:57:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:57:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:30,455 INFO L225 Difference]: With dead ends: 18 [2022-11-25 23:57:30,455 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 23:57:30,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:57:30,456 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:30,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 23:57:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 23:57:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-25 23:57:30,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2022-11-25 23:57:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:30,462 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-25 23:57:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-25 23:57:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:57:30,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:30,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2022-11-25 23:57:30,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:57:30,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1445584685, now seen corresponding path program 2 times [2022-11-25 23:57:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:30,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499069548] [2022-11-25 23:57:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:30,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:57:30,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499069548] [2022-11-25 23:57:30,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499069548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:30,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:30,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:57:30,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468022764] [2022-11-25 23:57:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:30,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:57:30,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:57:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:57:30,798 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:30,806 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-25 23:57:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:57:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 [2022-11-25 23:57:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:30,807 INFO L225 Difference]: With dead ends: 17 [2022-11-25 23:57:30,807 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 23:57:30,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:57:30,808 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:30,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 23:57:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 23:57:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 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) [2022-11-25 23:57:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-25 23:57:30,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2022-11-25 23:57:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:30,811 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-25 23:57:30,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-25 23:57:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:57:30,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:30,812 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2022-11-25 23:57:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:57:30,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1863420887, now seen corresponding path program 2 times [2022-11-25 23:57:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:30,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445563549] [2022-11-25 23:57:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:57:30,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445563549] [2022-11-25 23:57:30,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445563549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307000320] [2022-11-25 23:57:30,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:57:30,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:30,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:30,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:30,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:57:31,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:57:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:57:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:57:31,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:57:31,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307000320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466830378] [2022-11-25 23:57:31,119 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 23:57:31,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:31,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:31,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:31,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:31,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:31,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:57:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:31,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:57:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:57:31,444 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:57:31,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 296 treesize of output 299 [2022-11-25 23:57:31,584 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 13 treesize of output 9 [2022-11-25 23:57:31,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:32,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '520#(and (<= |ULTIMATE.start_glob2_~p~0#1.offset| |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.base|) (= (ite (and (= ~tmp~0.base |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~p~0#1.offset| ~tmp~0.offset)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.offset|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.offset|) (<= 4 ~tmp~0.offset) (= |ULTIMATE.start_main_~#pathbuf~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (<= 4 |ULTIMATE.start_glob2_#in~pathlim#1.offset|) (<= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= |ULTIMATE.start_main_~bound~0#1.offset| 4) (= |ULTIMATE.start_glob2_~p~0#1.base| |ULTIMATE.start_glob2_~pathlim#1.base|) (<= 4 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 4 |ULTIMATE.start_main_~bound~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 4) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~tmp~0.offset 4) (<= 0 |ULTIMATE.start_main_~#pathbuf~0#1.base|) (= |#NULL.offset| 0) (<= 0 ~tmp~0.base) (<= 0 |ULTIMATE.start_main_~bound~0#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~pathlim#1.offset| 4) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:32,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:32,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:32,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-25 23:57:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827193422] [2022-11-25 23:57:32,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:32,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:57:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:57:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:57:32,160 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:32,197 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-25 23:57:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:57:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:57:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:32,198 INFO L225 Difference]: With dead ends: 14 [2022-11-25 23:57:32,198 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 23:57:32,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:57:32,199 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:32,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:32,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 23:57:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 23:57:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) 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) [2022-11-25 23:57:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-25 23:57:32,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-11-25 23:57:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-25 23:57:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-25 23:57:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:57:32,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:32,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1] [2022-11-25 23:57:32,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:32,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:32,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1 more)] === [2022-11-25 23:57:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1931477664, now seen corresponding path program 2 times [2022-11-25 23:57:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752700500] [2022-11-25 23:57:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:32,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:32,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752700500] [2022-11-25 23:57:32,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752700500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032222240] [2022-11-25 23:57:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:57:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:32,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:32,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:57:32,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:57:32,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:57:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:32,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:57:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:57:32,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:57:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032222240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833275517] [2022-11-25 23:57:32,749 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 23:57:32,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:32,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:32,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:32,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:32,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:57:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:57:32,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:57:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:57:33,063 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-25 23:57:33,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 299 treesize of output 302 [2022-11-25 23:57:33,226 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 13 treesize of output 9 [2022-11-25 23:57:33,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:33,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '639#(and (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.base|) (= (ite (and (= ~tmp~0.base |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~p~0#1.offset| ~tmp~0.offset)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.offset|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_~pathbuf#1.offset|) (<= 4 ~tmp~0.offset) (= |ULTIMATE.start_main_~#pathbuf~0#1.offset| 0) (<= 0 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (<= 4 |ULTIMATE.start_glob2_#in~pathlim#1.offset|) (<= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= |ULTIMATE.start_main_~bound~0#1.offset| 4) (= |ULTIMATE.start_glob2_~p~0#1.base| |ULTIMATE.start_glob2_~pathlim#1.base|) (<= 4 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 4 |ULTIMATE.start_main_~bound~0#1.offset|) (<= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 4) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~tmp~0.offset 4) (<= 0 |ULTIMATE.start_main_~#pathbuf~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~bound~0#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.base|) (<= |ULTIMATE.start_glob2_~pathlim#1.offset| 4) (<= 0 |#StackHeapBarrier|) (< (select |#length| |ULTIMATE.start_glob2_~p~0#1.base|) (+ |ULTIMATE.start_glob2_~p~0#1.offset| 4)) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:33,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-25 23:57:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340112455] [2022-11-25 23:57:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:57:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:57:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:57:33,829 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:33,883 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2022-11-25 23:57:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:57:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:57:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:33,884 INFO L225 Difference]: With dead ends: 10 [2022-11-25 23:57:33,884 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:57:33,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:57:33,885 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:33,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:57:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:57:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:57:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:57:33,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-11-25 23:57:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:33,887 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:57:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:57:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:57:33,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:57:33,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 4 remaining) [2022-11-25 23:57:33,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 4 remaining) [2022-11-25 23:57:33,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 4 remaining) [2022-11-25 23:57:33,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (0 of 4 remaining) [2022-11-25 23:57:33,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:57:34,099 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:57:34,101 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:57:34,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:57:34 BoogieIcfgContainer [2022-11-25 23:57:34,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:57:34,105 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:57:34,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:57:34,105 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:57:34,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:57:23" (3/4) ... [2022-11-25 23:57:34,109 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 23:57:34,121 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-25 23:57:34,121 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-25 23:57:34,121 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 23:57:34,121 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 23:57:34,154 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:57:34,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:57:34,159 INFO L158 Benchmark]: Toolchain (without parser) took 11847.14ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 120.8MB in the beginning and 120.2MB in the end (delta: 602.2kB). Peak memory consumption was 115.4MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,159 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 70.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:57:34,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.08ms. Allocated memory is still 151.0MB. Free memory was 120.8MB in the beginning and 110.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,165 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.98ms. Allocated memory is still 151.0MB. Free memory was 110.3MB in the beginning and 108.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:57:34,165 INFO L158 Benchmark]: Boogie Preprocessor took 42.24ms. Allocated memory is still 151.0MB. Free memory was 108.9MB in the beginning and 107.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,166 INFO L158 Benchmark]: RCFGBuilder took 363.58ms. Allocated memory is still 151.0MB. Free memory was 107.7MB in the beginning and 95.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,166 INFO L158 Benchmark]: TraceAbstraction took 10999.53ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 94.2MB in the beginning and 121.9MB in the end (delta: -27.7MB). Peak memory consumption was 88.1MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,167 INFO L158 Benchmark]: Witness Printer took 49.61ms. Allocated memory is still 264.2MB. Free memory was 121.9MB in the beginning and 120.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:57:34,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 70.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.08ms. Allocated memory is still 151.0MB. Free memory was 120.8MB in the beginning and 110.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.98ms. Allocated memory is still 151.0MB. Free memory was 110.3MB in the beginning and 108.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.24ms. Allocated memory is still 151.0MB. Free memory was 108.9MB in the beginning and 107.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 363.58ms. Allocated memory is still 151.0MB. Free memory was 107.7MB in the beginning and 95.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10999.53ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 94.2MB in the beginning and 121.9MB in the end (delta: -27.7MB). Peak memory consumption was 88.1MB. Max. memory is 16.1GB. * Witness Printer took 49.61ms. Allocated memory is still 264.2MB. Free memory was 121.9MB in the beginning and 120.2MB in the end (delta: 1.7MB). 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: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: 38]: 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, 12 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 66 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 66 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 126 IncrementalHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 49 mSDtfsCounter, 126 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=7, InterpolantAutomatonStates: 43, 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, 10 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 126 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 1180 SizeOfPredicates, 53 NumberOfNonLiveVariables, 445 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 41/87 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 23:57:34,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99777a01-57f4-446b-a386-f9740c4a2646/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE