./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/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_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 15:02:24,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:02:24,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:02:24,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:02:24,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:02:24,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:02:24,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:02:24,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:02:24,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:02:24,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:02:24,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:02:24,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:02:24,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:02:24,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:02:24,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:02:24,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:02:24,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:02:24,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:02:24,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:02:24,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:02:24,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:02:24,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:02:24,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:02:24,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:02:24,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:02:24,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:02:24,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:02:24,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:02:24,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:02:24,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:02:24,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:02:24,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:02:24,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:02:24,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:02:24,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:02:24,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:02:24,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:02:24,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:02:24,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:02:24,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:02:24,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:02:24,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:02:24,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:02:24,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:02:24,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:02:24,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:02:24,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:02:24,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:02:24,243 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:02:24,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:02:24,244 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:02:24,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:02:24,245 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:02:24,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:02:24,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:02:24,245 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:02:24,246 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:02:24,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:02:24,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:02:24,246 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:02:24,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:02:24,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:02:24,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:02:24,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:02:24,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:02:24,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:02:24,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:02:24,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:02:24,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:02:24,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:02:24,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:02:24,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:02:24,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:02:24,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:02:24,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:02:24,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:02:24,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:02:24,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:24,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:02:24,253 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:02:24,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:02:24,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:02:24,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:02:24,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:02:24,254 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_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c73403384a361e15608c077b8e86297621fa69c42f15894e841079f64af74a [2022-11-23 15:02:24,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:02:24,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:02:24,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:02:24,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:02:24,678 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:02:24,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2022-11-23 15:02:28,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:02:28,420 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:02:28,421 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2022-11-23 15:02:28,429 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/data/5319a56a7/649a3b90fe0644a8b5c12f3234329138/FLAGb9f561061 [2022-11-23 15:02:28,458 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/data/5319a56a7/649a3b90fe0644a8b5c12f3234329138 [2022-11-23 15:02:28,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:02:28,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:02:28,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:28,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:02:28,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:02:28,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32da986e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28, skipping insertion in model container [2022-11-23 15:02:28,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:02:28,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:02:28,715 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_14fd5069-ba77-4303-a773-d57ddbee9dd5/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2022-11-23 15:02:28,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:28,762 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:02:28,781 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_14fd5069-ba77-4303-a773-d57ddbee9dd5/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2022-11-23 15:02:28,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:28,816 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:02:28,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28 WrapperNode [2022-11-23 15:02:28,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:28,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:28,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:02:28,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:02:28,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,870 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2022-11-23 15:02:28,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:28,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:02:28,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:02:28,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:02:28,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:02:28,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:02:28,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:02:28,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:02:28,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (1/1) ... [2022-11-23 15:02:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:28,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:02:28,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:02:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:02:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:02:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:02:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:02:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:02:29,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:02:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:02:29,139 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:02:29,141 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:02:29,309 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:02:29,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:02:29,350 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:02:29,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:29 BoogieIcfgContainer [2022-11-23 15:02:29,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:02:29,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:02:29,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:02:29,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:02:29,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:02:28" (1/3) ... [2022-11-23 15:02:29,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a51e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:29, skipping insertion in model container [2022-11-23 15:02:29,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:28" (2/3) ... [2022-11-23 15:02:29,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a51e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:29, skipping insertion in model container [2022-11-23 15:02:29,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:29" (3/3) ... [2022-11-23 15:02:29,364 INFO L112 eAbstractionObserver]: Analyzing ICFG veris.c_NetBSD-libc_loop.i [2022-11-23 15:02:29,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:02:29,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-23 15:02:29,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:02:29,520 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;@34a206c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:02:29,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 15:02:29,528 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) [2022-11-23 15:02:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:02:29,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:29,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:02:29,538 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)] === [2022-11-23 15:02:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash 67645, now seen corresponding path program 1 times [2022-11-23 15:02:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838067780] [2022-11-23 15:02:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:30,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838067780] [2022-11-23 15:02:30,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838067780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:30,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:30,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:02:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008575752] [2022-11-23 15:02:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:02:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:02:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:02:30,168 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) [2022-11-23 15:02:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:30,218 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-11-23 15:02:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:02:30,222 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 [2022-11-23 15:02:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:30,231 INFO L225 Difference]: With dead ends: 20 [2022-11-23 15:02:30,232 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 15:02:30,233 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 [2022-11-23 15:02:30,238 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 [2022-11-23 15:02:30,239 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] [2022-11-23 15:02:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 15:02:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2022-11-23 15:02:30,276 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) [2022-11-23 15:02:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-23 15:02:30,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2022-11-23 15:02:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:30,279 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-23 15:02:30,279 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) [2022-11-23 15:02:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-23 15:02:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:02:30,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:30,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:02:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:02:30,281 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)] === [2022-11-23 15:02:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2065607, now seen corresponding path program 1 times [2022-11-23 15:02:30,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:30,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789508437] [2022-11-23 15:02:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:30,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:30,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:30,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789508437] [2022-11-23 15:02:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789508437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:30,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:30,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:02:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137017378] [2022-11-23 15:02:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:02:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:02:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:02:30,501 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) [2022-11-23 15:02:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:30,555 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-23 15:02:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:02:30,556 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 [2022-11-23 15:02:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:30,557 INFO L225 Difference]: With dead ends: 17 [2022-11-23 15:02:30,557 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 15:02:30,558 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 [2022-11-23 15:02:30,560 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 [2022-11-23 15:02:30,561 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] [2022-11-23 15:02:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 15:02:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2022-11-23 15:02:30,565 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) [2022-11-23 15:02:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-23 15:02:30,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2022-11-23 15:02:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:30,567 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-23 15:02:30,567 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) [2022-11-23 15:02:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-23 15:02:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:02:30,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:30,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:02:30,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:02:30,569 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)] === [2022-11-23 15:02:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash 64038831, now seen corresponding path program 1 times [2022-11-23 15:02:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:30,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332724708] [2022-11-23 15:02:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:30,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:30,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:30,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332724708] [2022-11-23 15:02:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332724708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:30,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:30,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:02:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350093125] [2022-11-23 15:02:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:30,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:02:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:02:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:02:30,694 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) [2022-11-23 15:02:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:30,713 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-11-23 15:02:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:02:30,714 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 [2022-11-23 15:02:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:30,715 INFO L225 Difference]: With dead ends: 12 [2022-11-23 15:02:30,715 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 15:02:30,720 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 [2022-11-23 15:02:30,724 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 [2022-11-23 15:02:30,727 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] [2022-11-23 15:02:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 15:02:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 15:02:30,735 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) [2022-11-23 15:02:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-23 15:02:30,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2022-11-23 15:02:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:30,739 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-23 15:02:30,740 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) [2022-11-23 15:02:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-23 15:02:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:02:30,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:30,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:02:30,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:02:30,743 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)] === [2022-11-23 15:02:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash 64038832, now seen corresponding path program 1 times [2022-11-23 15:02:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672545177] [2022-11-23 15:02:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:30,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672545177] [2022-11-23 15:02:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672545177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:30,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:30,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:02:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316915785] [2022-11-23 15:02:30,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:30,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:02:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:02:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:02:30,875 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) [2022-11-23 15:02:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:30,896 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-23 15:02:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:02:30,897 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 [2022-11-23 15:02:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:30,898 INFO L225 Difference]: With dead ends: 14 [2022-11-23 15:02:30,899 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:02:30,899 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 [2022-11-23 15:02:30,901 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 [2022-11-23 15:02:30,902 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] [2022-11-23 15:02:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:02:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:02:30,905 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) [2022-11-23 15:02:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-23 15:02:30,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2022-11-23 15:02:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:30,907 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-23 15:02:30,907 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) [2022-11-23 15:02:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-23 15:02:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:02:30,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:30,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:30,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:02:30,909 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)] === [2022-11-23 15:02:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1411789237, now seen corresponding path program 1 times [2022-11-23 15:02:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125547956] [2022-11-23 15:02:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:31,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:31,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125547956] [2022-11-23 15:02:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125547956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305600397] [2022-11-23 15:02:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:31,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:31,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:02:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:02:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:31,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:31,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305600397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:31,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976689587] [2022-11-23 15:02:31,526 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:02:31,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:31,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:31,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:31,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:31,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:31,646 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 [2022-11-23 15:02:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:31,789 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 [2022-11-23 15:02:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:32,143 INFO L321 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-23 15:02:32,143 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 [2022-11-23 15:02:32,321 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 [2022-11-23 15:02:32,370 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 [2022-11-23 15:02:32,414 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:33,130 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 [2022-11-23 15:02:33,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:33,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:33,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-23 15:02:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628694039] [2022-11-23 15:02:33,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:33,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:02:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:02:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:02:33,133 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) [2022-11-23 15:02:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:33,168 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-23 15:02:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:02:33,168 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 [2022-11-23 15:02:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:33,170 INFO L225 Difference]: With dead ends: 15 [2022-11-23 15:02:33,170 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 15:02:33,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:02:33,174 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:33,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:02:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 15:02:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 15:02:33,181 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) [2022-11-23 15:02:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-23 15:02:33,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2022-11-23 15:02:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:33,183 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-23 15:02:33,183 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) [2022-11-23 15:02:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-23 15:02:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:02:33,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:33,185 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:33,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:33,393 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)] === [2022-11-23 15:02:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 815761999, now seen corresponding path program 1 times [2022-11-23 15:02:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436541162] [2022-11-23 15:02:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:33,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:33,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436541162] [2022-11-23 15:02:33,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436541162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:33,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948633781] [2022-11-23 15:02:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:33,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:33,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:33,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:33,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:02:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:02:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:33,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:33,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948633781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:33,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709617199] [2022-11-23 15:02:33,653 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:02:33,653 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:33,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:33,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:33,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:33,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:33,690 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 [2022-11-23 15:02:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:33,763 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 [2022-11-23 15:02:34,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:34,052 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-23 15:02:34,052 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 [2022-11-23 15:02:34,213 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 [2022-11-23 15:02:34,246 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:34,796 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 [2022-11-23 15:02:34,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:34,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:34,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-23 15:02:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352139985] [2022-11-23 15:02:34,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:02:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:02:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:02:34,798 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) [2022-11-23 15:02:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:34,851 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-11-23 15:02:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:02:34,852 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 [2022-11-23 15:02:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:34,852 INFO L225 Difference]: With dead ends: 22 [2022-11-23 15:02:34,852 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:02:34,853 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 [2022-11-23 15:02:34,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:34,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:02:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:02:34,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-11-23 15:02:34,856 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) [2022-11-23 15:02:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-23 15:02:34,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2022-11-23 15:02:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-23 15:02:34,857 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) [2022-11-23 15:02:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-23 15:02:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:02:34,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:34,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1] [2022-11-23 15:02:34,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:35,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:35,059 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)] === [2022-11-23 15:02:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -481176792, now seen corresponding path program 1 times [2022-11-23 15:02:35,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:35,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595097884] [2022-11-23 15:02:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:35,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:35,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595097884] [2022-11-23 15:02:35,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595097884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:35,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985878542] [2022-11-23 15:02:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:35,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:02:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 15:02:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:35,266 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 [2022-11-23 15:02:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:35,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:35,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985878542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596327757] [2022-11-23 15:02:35,378 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 15:02:35,379 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:35,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:35,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:35,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:35,406 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 [2022-11-23 15:02:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:35,457 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 [2022-11-23 15:02:35,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:35,716 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-23 15:02:35,717 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 [2022-11-23 15:02:35,854 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 [2022-11-23 15:02:35,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:36,595 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 [2022-11-23 15:02:36,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:36,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:36,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 15:02:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183783577] [2022-11-23 15:02:36,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:02:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:02:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:02:36,600 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) [2022-11-23 15:02:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:36,656 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-23 15:02:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:02:36,656 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 [2022-11-23 15:02:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:36,657 INFO L225 Difference]: With dead ends: 18 [2022-11-23 15:02:36,657 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 15:02:36,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:02:36,658 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 [2022-11-23 15:02:36,659 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] [2022-11-23 15:02:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 15:02:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 15:02:36,661 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) [2022-11-23 15:02:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-23 15:02:36,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2022-11-23 15:02:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:36,674 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-23 15:02:36,674 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) [2022-11-23 15:02:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-23 15:02:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:02:36,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:36,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2022-11-23 15:02:36,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:36,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:36,883 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)] === [2022-11-23 15:02:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1445584685, now seen corresponding path program 2 times [2022-11-23 15:02:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042736806] [2022-11-23 15:02:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:37,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042736806] [2022-11-23 15:02:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042736806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:37,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:37,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:02:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037558337] [2022-11-23 15:02:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:37,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:02:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:02:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:02:37,011 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) [2022-11-23 15:02:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:37,022 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-23 15:02:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:02:37,022 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 [2022-11-23 15:02:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:37,023 INFO L225 Difference]: With dead ends: 17 [2022-11-23 15:02:37,023 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:02:37,023 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 [2022-11-23 15:02:37,024 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 [2022-11-23 15:02:37,025 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] [2022-11-23 15:02:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:02:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:02:37,027 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) [2022-11-23 15:02:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-23 15:02:37,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2022-11-23 15:02:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:37,028 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-23 15:02:37,028 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) [2022-11-23 15:02:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-23 15:02:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:02:37,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:37,029 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2022-11-23 15:02:37,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:02:37,031 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)] === [2022-11-23 15:02:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1863420887, now seen corresponding path program 2 times [2022-11-23 15:02:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637603684] [2022-11-23 15:02:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:37,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637603684] [2022-11-23 15:02:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637603684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412156546] [2022-11-23 15:02:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:02:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:37,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:37,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:02:37,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 15:02:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:02:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:02:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:37,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412156546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143176649] [2022-11-23 15:02:37,440 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:02:37,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:37,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:37,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:37,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:37,471 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 [2022-11-23 15:02:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:37,531 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 [2022-11-23 15:02:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:37,801 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-23 15:02:37,802 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 [2022-11-23 15:02:37,974 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 [2022-11-23 15:02:38,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:38,689 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 [2022-11-23 15:02:38,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:38,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:38,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-23 15:02:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390691989] [2022-11-23 15:02:38,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:02:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:02:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:02:38,692 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) [2022-11-23 15:02:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:38,742 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-23 15:02:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:02:38,742 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 [2022-11-23 15:02:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:38,743 INFO L225 Difference]: With dead ends: 14 [2022-11-23 15:02:38,743 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:02:38,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:02:38,744 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 [2022-11-23 15:02:38,745 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] [2022-11-23 15:02:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:02:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:02:38,747 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) [2022-11-23 15:02:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-23 15:02:38,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-11-23 15:02:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:38,748 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-23 15:02:38,748 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) [2022-11-23 15:02:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-23 15:02:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:02:38,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:38,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1] [2022-11-23 15:02:38,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:38,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 15:02:38,957 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)] === [2022-11-23 15:02:38,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:38,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1931477664, now seen corresponding path program 2 times [2022-11-23 15:02:38,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501808971] [2022-11-23 15:02:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:02:39,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501808971] [2022-11-23 15:02:39,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501808971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852298919] [2022-11-23 15:02:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:02:39,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:39,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:39,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:39,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:02:39,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:02:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:02:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 15:02:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:39,136 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 [2022-11-23 15:02:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:39,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852298919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [460866267] [2022-11-23 15:02:39,377 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 15:02:39,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:39,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:39,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:39,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:39,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:39,404 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 [2022-11-23 15:02:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:39,455 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 [2022-11-23 15:02:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:39,719 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-23 15:02:39,720 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 [2022-11-23 15:02:39,883 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 [2022-11-23 15:02:39,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:40,598 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 [2022-11-23 15:02:40,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:40,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:40,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-23 15:02:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711848771] [2022-11-23 15:02:40,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:02:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:02:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:02:40,601 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) [2022-11-23 15:02:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:40,683 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2022-11-23 15:02:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:02:40,684 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 [2022-11-23 15:02:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:40,684 INFO L225 Difference]: With dead ends: 10 [2022-11-23 15:02:40,684 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:02:40,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:02:40,685 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 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 [2022-11-23 15:02:40,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:02:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:02:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:02:40,687 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) [2022-11-23 15:02:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:02:40,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-11-23 15:02:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:40,687 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:02:40,687 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) [2022-11-23 15:02:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:02:40,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:02:40,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 4 remaining) [2022-11-23 15:02:40,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 4 remaining) [2022-11-23 15:02:40,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 4 remaining) [2022-11-23 15:02:40,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (0 of 4 remaining) [2022-11-23 15:02:40,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:02:40,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:02:40,908 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2022-11-23 15:02:40,910 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:02:40,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:02:40 BoogieIcfgContainer [2022-11-23 15:02:40,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:02:40,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:02:40,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:02:40,914 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:02:40,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:29" (3/4) ... [2022-11-23 15:02:40,919 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 15:02:40,930 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-23 15:02:40,930 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-23 15:02:40,930 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 15:02:40,931 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-23 15:02:40,965 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:02:40,965 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:02:40,966 INFO L158 Benchmark]: Toolchain (without parser) took 12497.41ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 113.0MB in the beginning and 91.3MB in the end (delta: 21.7MB). Peak memory consumption was 69.9MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,967 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:02:40,969 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.70ms. Allocated memory is still 144.7MB. Free memory was 113.0MB in the beginning and 103.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,970 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.79ms. Allocated memory is still 144.7MB. Free memory was 102.6MB in the beginning and 101.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,971 INFO L158 Benchmark]: Boogie Preprocessor took 58.68ms. Allocated memory is still 144.7MB. Free memory was 101.3MB in the beginning and 100.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,972 INFO L158 Benchmark]: RCFGBuilder took 422.00ms. Allocated memory is still 144.7MB. Free memory was 100.0MB in the beginning and 87.9MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,972 INFO L158 Benchmark]: TraceAbstraction took 11557.01ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 87.0MB in the beginning and 94.1MB in the end (delta: -7.1MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,973 INFO L158 Benchmark]: Witness Printer took 51.39ms. Allocated memory is still 190.8MB. Free memory was 94.1MB in the beginning and 91.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:40,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.70ms. Allocated memory is still 144.7MB. Free memory was 113.0MB in the beginning and 103.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.79ms. Allocated memory is still 144.7MB. Free memory was 102.6MB in the beginning and 101.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.68ms. Allocated memory is still 144.7MB. Free memory was 101.3MB in the beginning and 100.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.00ms. Allocated memory is still 144.7MB. Free memory was 100.0MB in the beginning and 87.9MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 11557.01ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 87.0MB in the beginning and 94.1MB in the end (delta: -7.1MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. * Witness Printer took 51.39ms. Allocated memory is still 190.8MB. Free memory was 94.1MB in the beginning and 91.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 11.4s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 77 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 126 IncrementalHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 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, 3.7s 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s 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! [2022-11-23 15:02:40,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14fd5069-ba77-4303-a773-d57ddbee9dd5/bin/utaipan-Q6hlc19bkW/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