./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0 --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 c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 --- 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-e04fb08 [2022-11-16 16:29:13,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:29:13,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:29:13,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:29:13,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:29:13,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:29:13,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:29:13,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:29:13,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:29:13,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:29:13,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:29:13,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:29:13,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:29:13,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:29:13,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:29:13,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:29:13,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:29:13,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:29:13,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:29:13,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:29:13,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:29:13,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:29:13,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:29:13,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:29:13,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:29:13,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:29:13,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:29:13,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:29:13,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:29:13,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:29:13,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:29:13,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:29:13,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:29:13,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:29:13,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:29:13,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:29:13,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:29:13,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:29:13,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:29:13,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:29:13,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:29:13,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:29:13,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:29:13,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:29:13,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:29:13,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:29:13,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:29:13,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:29:13,608 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:29:13,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:29:13,608 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:29:13,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:29:13,609 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:29:13,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:29:13,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:29:13,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:29:13,610 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:29:13,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:29:13,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:29:13,611 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:29:13,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:29:13,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:29:13,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:29:13,613 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:29:13,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:29:13,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:29:13,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:29:13,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:29:13,614 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:29:13,614 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:29:13,615 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:29:13,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:29:13,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:29:13,615 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:29:13,615 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:29:13,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:29:13,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:29:13,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:29:13,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:29:13,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:29:13,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:29:13,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:29:13,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:29:13,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:29:13,617 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_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 [2022-11-16 16:29:13,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:29:13,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:29:13,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:29:13,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:29:13,960 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:29:13,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2022-11-16 16:29:14,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/data/5ba7263ed/81c8e34428ca4a8fb9379271dd81a7af/FLAGa27a92a4a [2022-11-16 16:29:14,579 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:29:14,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2022-11-16 16:29:14,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/data/5ba7263ed/81c8e34428ca4a8fb9379271dd81a7af/FLAGa27a92a4a [2022-11-16 16:29:14,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/data/5ba7263ed/81c8e34428ca4a8fb9379271dd81a7af [2022-11-16 16:29:14,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:29:14,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:29:14,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:29:14,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:29:14,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:29:14,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:29:14" (1/1) ... [2022-11-16 16:29:14,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da36002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:14, skipping insertion in model container [2022-11-16 16:29:14,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:29:14" (1/1) ... [2022-11-16 16:29:14,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:29:14,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:29:15,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:29:15,205 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:29:15,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:29:15,235 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:29:15,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15 WrapperNode [2022-11-16 16:29:15,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:29:15,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:29:15,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:29:15,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:29:15,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,279 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-16 16:29:15,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:29:15,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:29:15,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:29:15,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:29:15,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:29:15,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:29:15,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:29:15,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:29:15,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (1/1) ... [2022-11-16 16:29:15,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:29:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:15,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:29:15,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:29:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:29:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:29:15,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:29:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 16:29:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:29:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:29:15,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:29:15,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:29:15,707 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:29:15,788 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:29:15,788 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 16:29:15,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:29:15 BoogieIcfgContainer [2022-11-16 16:29:15,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:29:15,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:29:15,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:29:15,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:29:15,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:29:14" (1/3) ... [2022-11-16 16:29:15,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf8806d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:29:15, skipping insertion in model container [2022-11-16 16:29:15,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:29:15" (2/3) ... [2022-11-16 16:29:15,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf8806d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:29:15, skipping insertion in model container [2022-11-16 16:29:15,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:29:15" (3/3) ... [2022-11-16 16:29:15,799 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2022-11-16 16:29:15,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:29:15,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 16:29:15,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:29:15,884 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;@62801d76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:29:15,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 16:29:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:29:15,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:15,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:29:15,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash 3271901, now seen corresponding path program 1 times [2022-11-16 16:29:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759876128] [2022-11-16 16:29:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:16,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759876128] [2022-11-16 16:29:16,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759876128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:16,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:29:16,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:29:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949192215] [2022-11-16 16:29:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:16,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:29:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:29:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:29:16,267 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2022-11-16 16:29:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:16,403 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-16 16:29:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:29:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 [2022-11-16 16:29:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:16,415 INFO L225 Difference]: With dead ends: 37 [2022-11-16 16:29:16,415 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 16:29:16,417 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 [2022-11-16 16:29:16,422 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:16,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 16:29:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-16 16:29:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-16 16:29:16,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-16 16:29:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:16,457 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-16 16:29:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2022-11-16 16:29:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-16 16:29:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:29:16,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:16,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:29:16,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:29:16,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 3197824, now seen corresponding path program 1 times [2022-11-16 16:29:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919395878] [2022-11-16 16:29:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:16,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919395878] [2022-11-16 16:29:16,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919395878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:16,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:29:16,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:29:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586241617] [2022-11-16 16:29:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:16,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:29:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:29:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:29:16,643 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2022-11-16 16:29:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:16,721 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-16 16:29:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:29:16,722 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 [2022-11-16 16:29:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:16,723 INFO L225 Difference]: With dead ends: 45 [2022-11-16 16:29:16,723 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 16:29:16,724 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 [2022-11-16 16:29:16,725 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:16,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 16:29:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2022-11-16 16:29:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-11-16 16:29:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-16 16:29:16,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2022-11-16 16:29:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:16,730 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-16 16:29:16,731 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) [2022-11-16 16:29:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-16 16:29:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:29:16,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:16,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:29:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:29:16,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash 3199854, now seen corresponding path program 1 times [2022-11-16 16:29:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:16,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70580351] [2022-11-16 16:29:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:16,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:16,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70580351] [2022-11-16 16:29:16,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70580351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:16,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:29:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:29:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50870107] [2022-11-16 16:29:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:16,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:29:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:29:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:29:16,812 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-16 16:29:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:16,834 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-16 16:29:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:29:16,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-11-16 16:29:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:16,836 INFO L225 Difference]: With dead ends: 19 [2022-11-16 16:29:16,836 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 16:29:16,836 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 [2022-11-16 16:29:16,838 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 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 [2022-11-16 16:29:16,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 16:29:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 16:29:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-16 16:29:16,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2022-11-16 16:29:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:16,842 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-16 16:29:16,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-16 16:29:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-16 16:29:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:29:16,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:16,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:29:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:29:16,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash 3199855, now seen corresponding path program 1 times [2022-11-16 16:29:16,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:16,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075760105] [2022-11-16 16:29:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:16,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:17,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075760105] [2022-11-16 16:29:17,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075760105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:17,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:29:17,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:29:17,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712858203] [2022-11-16 16:29:17,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:29:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:29:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:29:17,061 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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) [2022-11-16 16:29:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:17,094 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-16 16:29:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:29:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 [2022-11-16 16:29:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:17,097 INFO L225 Difference]: With dead ends: 20 [2022-11-16 16:29:17,097 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 16:29:17,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:29:17,102 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 16:29:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-16 16:29:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-16 16:29:17,111 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-16 16:29:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:17,112 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-16 16:29:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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) [2022-11-16 16:29:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-16 16:29:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:29:17,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:17,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:17,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:29:17,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 838874721, now seen corresponding path program 1 times [2022-11-16 16:29:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:17,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494644954] [2022-11-16 16:29:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:17,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494644954] [2022-11-16 16:29:17,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494644954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69803102] [2022-11-16 16:29:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:17,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:17,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:17,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:29:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:29:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:17,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:17,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 16:29:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:17,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69803102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:17,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045071847] [2022-11-16 16:29:17,675 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:17,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:17,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:17,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:17,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:17,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:17,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:29:18,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 163 [2022-11-16 16:29:18,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:19,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1045071847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:19,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:19,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-11-16 16:29:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092290293] [2022-11-16 16:29:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:19,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:29:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:29:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:29:19,366 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-16 16:29:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:19,477 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-16 16:29:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:29:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2022-11-16 16:29:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:19,479 INFO L225 Difference]: With dead ends: 25 [2022-11-16 16:29:19,479 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 16:29:19,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:29:19,480 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:19,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 16:29:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-16 16:29:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-11-16 16:29:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-16 16:29:19,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2022-11-16 16:29:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:19,484 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-16 16:29:19,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-16 16:29:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-16 16:29:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:29:19,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:19,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:19,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:19,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 619437657, now seen corresponding path program 1 times [2022-11-16 16:29:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113955034] [2022-11-16 16:29:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:19,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113955034] [2022-11-16 16:29:19,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113955034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442415408] [2022-11-16 16:29:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:19,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:19,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:19,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:29:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:29:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:20,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442415408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378643820] [2022-11-16 16:29:20,082 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:20,082 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:20,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:20,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:20,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:20,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:20,148 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:20,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:20,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:20,437 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 15 treesize of output 14 [2022-11-16 16:29:20,502 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 16 treesize of output 12 [2022-11-16 16:29:20,571 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 15 treesize of output 14 [2022-11-16 16:29:20,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:20,737 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 15 treesize of output 14 [2022-11-16 16:29:20,778 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 16 treesize of output 12 [2022-11-16 16:29:20,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:20,907 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:20,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:21,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:21,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '398#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 32 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:21,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:21,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:21,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 16:29:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353768084] [2022-11-16 16:29:21,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 16:29:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 16:29:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:29:21,519 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:21,802 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-11-16 16:29:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 16:29:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:29:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:21,813 INFO L225 Difference]: With dead ends: 68 [2022-11-16 16:29:21,813 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 16:29:21,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:29:21,814 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:21,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 23 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:29:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 16:29:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 30. [2022-11-16 16:29:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 29 states have internal predecessors, (35), 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) [2022-11-16 16:29:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-16 16:29:21,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2022-11-16 16:29:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:21,825 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-16 16:29:21,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-16 16:29:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:29:21,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:21,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:21,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:22,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 16:29:22,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash 619439688, now seen corresponding path program 1 times [2022-11-16 16:29:22,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:22,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833282820] [2022-11-16 16:29:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:22,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:22,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833282820] [2022-11-16 16:29:22,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833282820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114553074] [2022-11-16 16:29:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:22,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:22,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:22,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:29:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:29:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:22,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:29:22,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:22,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114553074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22508389] [2022-11-16 16:29:22,453 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:22,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:22,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:22,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:22,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:22,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:22,506 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:22,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:22,671 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 15 treesize of output 14 [2022-11-16 16:29:22,712 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 15 treesize of output 14 [2022-11-16 16:29:22,746 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 16 treesize of output 12 [2022-11-16 16:29:22,802 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 15 treesize of output 14 [2022-11-16 16:29:22,859 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 15 treesize of output 14 [2022-11-16 16:29:22,903 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 15 treesize of output 14 [2022-11-16 16:29:22,930 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 16 treesize of output 12 [2022-11-16 16:29:22,974 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 15 treesize of output 14 [2022-11-16 16:29:23,045 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 15 treesize of output 14 [2022-11-16 16:29:23,093 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 15 treesize of output 14 [2022-11-16 16:29:23,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:23,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '586#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|)) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:23,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:23,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:23,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2022-11-16 16:29:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329615900] [2022-11-16 16:29:23,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:23,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 16:29:23,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:23,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 16:29:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:29:23,718 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-11-16 16:29:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:23,808 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-11-16 16:29:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:29:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:29:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:23,809 INFO L225 Difference]: With dead ends: 58 [2022-11-16 16:29:23,809 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 16:29:23,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-16 16:29:23,810 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:23,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 32 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 16:29:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-16 16:29:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.511111111111111) internal successors, (68), 50 states have internal predecessors, (68), 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) [2022-11-16 16:29:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-16 16:29:23,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 10 [2022-11-16 16:29:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:23,816 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-16 16:29:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-11-16 16:29:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-16 16:29:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:29:23,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:23,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:23,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 16:29:24,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:24,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1745450776, now seen corresponding path program 1 times [2022-11-16 16:29:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087273045] [2022-11-16 16:29:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:24,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087273045] [2022-11-16 16:29:24,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087273045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896650050] [2022-11-16 16:29:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:24,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:29:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:29:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:24,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:24,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 16:29:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:24,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896650050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:24,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272105131] [2022-11-16 16:29:24,387 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 16:29:24,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:24,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:24,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:24,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:24,446 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:24,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 16:29:24,575 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 15 treesize of output 14 [2022-11-16 16:29:24,613 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 15 treesize of output 14 [2022-11-16 16:29:24,647 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 16 treesize of output 12 [2022-11-16 16:29:24,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:24,772 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:24,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:24,858 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 15 treesize of output 14 [2022-11-16 16:29:24,886 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 16 treesize of output 12 [2022-11-16 16:29:24,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:25,015 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:25,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:25,082 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 15 treesize of output 14 [2022-11-16 16:29:25,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:25,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:25,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:25,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:25,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-11-16 16:29:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677461157] [2022-11-16 16:29:25,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:25,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:29:25,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:29:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:29:25,706 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2022-11-16 16:29:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:25,829 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2022-11-16 16:29:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:29:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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 [2022-11-16 16:29:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:25,832 INFO L225 Difference]: With dead ends: 55 [2022-11-16 16:29:25,832 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 16:29:25,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:29:25,835 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:25,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 25 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 16:29:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-16 16:29:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.510204081632653) internal successors, (74), 54 states have internal predecessors, (74), 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) [2022-11-16 16:29:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-11-16 16:29:25,840 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 13 [2022-11-16 16:29:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:25,840 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-11-16 16:29:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2022-11-16 16:29:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-11-16 16:29:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:29:25,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:25,841 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-11-16 16:29:25,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:26,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:26,046 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1745523877, now seen corresponding path program 2 times [2022-11-16 16:29:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:26,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863753361] [2022-11-16 16:29:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:26,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:26,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863753361] [2022-11-16 16:29:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863753361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:26,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:29:26,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:29:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890449071] [2022-11-16 16:29:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:26,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:29:26,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:29:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:29:26,086 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-16 16:29:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:26,117 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2022-11-16 16:29:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:29:26,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 13 [2022-11-16 16:29:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:26,119 INFO L225 Difference]: With dead ends: 83 [2022-11-16 16:29:26,119 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 16:29:26,119 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 [2022-11-16 16:29:26,120 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:26,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 16:29:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-11-16 16:29:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.509090909090909) internal successors, (83), 60 states have internal predecessors, (83), 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) [2022-11-16 16:29:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-11-16 16:29:26,125 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 13 [2022-11-16 16:29:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:26,125 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-11-16 16:29:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-16 16:29:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-11-16 16:29:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:29:26,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:26,126 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-11-16 16:29:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 16:29:26,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -543695699, now seen corresponding path program 3 times [2022-11-16 16:29:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:26,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180327274] [2022-11-16 16:29:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:26,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180327274] [2022-11-16 16:29:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180327274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17780236] [2022-11-16 16:29:26,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:29:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:26,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:26,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:29:26,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:29:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:29:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:26,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:26,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17780236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763090656] [2022-11-16 16:29:26,334 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:26,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:26,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:26,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:26,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:26,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:26,385 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:26,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:29:26,504 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 15 treesize of output 14 [2022-11-16 16:29:26,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:26,661 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 16 treesize of output 12 [2022-11-16 16:29:26,705 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 15 treesize of output 14 [2022-11-16 16:29:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:26,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:26,885 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 16 treesize of output 12 [2022-11-16 16:29:26,913 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 15 treesize of output 14 [2022-11-16 16:29:26,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:27,027 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 15 treesize of output 14 [2022-11-16 16:29:27,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:27,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1134#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 32 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:27,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:27,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:27,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 16:29:27,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138600904] [2022-11-16 16:29:27,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:27,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:29:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:29:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:29:27,507 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:27,598 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-11-16 16:29:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:29:27,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:29:27,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:27,599 INFO L225 Difference]: With dead ends: 53 [2022-11-16 16:29:27,600 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 16:29:27,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:29:27,600 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:27,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 16:29:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2022-11-16 16:29:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.525) internal successors, (61), 45 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-11-16 16:29:27,605 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 13 [2022-11-16 16:29:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:27,605 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-11-16 16:29:27,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-11-16 16:29:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:29:27,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:27,606 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-11-16 16:29:27,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 16:29:27,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 16:29:27,807 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1723334714, now seen corresponding path program 1 times [2022-11-16 16:29:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:27,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33430954] [2022-11-16 16:29:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:27,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33430954] [2022-11-16 16:29:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33430954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400201118] [2022-11-16 16:29:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:27,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:27,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:29:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:27,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:29:27,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:27,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:28,000 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 16:29:28,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 16:29:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400201118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227451257] [2022-11-16 16:29:28,012 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:28,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:28,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:28,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:28,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:28,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:28,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:28,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:28,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:28,190 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 15 treesize of output 14 [2022-11-16 16:29:28,235 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 15 treesize of output 14 [2022-11-16 16:29:28,260 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 16 treesize of output 12 [2022-11-16 16:29:28,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:28,359 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 15 treesize of output 14 [2022-11-16 16:29:28,431 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 16 treesize of output 12 [2022-11-16 16:29:28,472 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 15 treesize of output 14 [2022-11-16 16:29:28,523 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 15 treesize of output 14 [2022-11-16 16:29:28,562 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 15 treesize of output 14 [2022-11-16 16:29:28,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:29,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1324#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (< |ULTIMATE.start_foo_~i~0#1| 32) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:29,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:29,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:29,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-16 16:29:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280656801] [2022-11-16 16:29:29,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:29,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:29:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:29:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:29:29,064 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-16 16:29:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:29,113 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-16 16:29:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:29:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) Word has length 14 [2022-11-16 16:29:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:29,114 INFO L225 Difference]: With dead ends: 45 [2022-11-16 16:29:29,114 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 16:29:29,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:29:29,115 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:29,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 16:29:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 16:29:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.45) internal successors, (58), 44 states have internal predecessors, (58), 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) [2022-11-16 16:29:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-11-16 16:29:29,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 14 [2022-11-16 16:29:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:29,119 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-11-16 16:29:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-16 16:29:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-11-16 16:29:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:29:29,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:29,120 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-11-16 16:29:29,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 16:29:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:29,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1723334715, now seen corresponding path program 1 times [2022-11-16 16:29:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691180461] [2022-11-16 16:29:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:29,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691180461] [2022-11-16 16:29:29,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691180461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:29,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909068749] [2022-11-16 16:29:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:29,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:29,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:29,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:29,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:29:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:29:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:29,531 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:29:29,531 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 16:29:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:29,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909068749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614174845] [2022-11-16 16:29:29,672 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:29,672 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:29,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:29,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:29,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:29,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:29,730 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:29,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:29,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:29,891 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 15 treesize of output 14 [2022-11-16 16:29:29,934 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 16 treesize of output 12 [2022-11-16 16:29:29,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:30,047 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:30,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:30,101 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 15 treesize of output 14 [2022-11-16 16:29:30,124 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 16 treesize of output 12 [2022-11-16 16:29:30,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:30,263 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:30,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:30,356 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 15 treesize of output 14 [2022-11-16 16:29:30,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:30,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1509#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (< |ULTIMATE.start_foo_~i~0#1| 32) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:30,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:30,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:30,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 16:29:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738572960] [2022-11-16 16:29:30,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:29:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:29:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:29:30,891 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2022-11-16 16:29:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:30,990 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-16 16:29:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:29:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 14 [2022-11-16 16:29:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:30,991 INFO L225 Difference]: With dead ends: 75 [2022-11-16 16:29:30,991 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 16:29:30,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:29:30,992 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:30,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 16:29:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2022-11-16 16:29:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 56 states have internal predecessors, (76), 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) [2022-11-16 16:29:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2022-11-16 16:29:30,996 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 14 [2022-11-16 16:29:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:30,996 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2022-11-16 16:29:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2022-11-16 16:29:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2022-11-16 16:29:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:29:30,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:30,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:31,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 16:29:31,198 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1954017440, now seen corresponding path program 1 times [2022-11-16 16:29:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:31,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668244210] [2022-11-16 16:29:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:31,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668244210] [2022-11-16 16:29:31,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668244210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:31,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144822369] [2022-11-16 16:29:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:31,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:31,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:29:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:29:31,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:31,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:29:31,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:29:31,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:29:31,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 16:29:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 16:29:31,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-11-16 16:29:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:31,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144822369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:31,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458675453] [2022-11-16 16:29:31,697 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 16:29:31,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:31,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:31,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:31,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:31,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:31,739 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:31,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:31,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:31,931 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 15 treesize of output 14 [2022-11-16 16:29:31,989 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 16 treesize of output 12 [2022-11-16 16:29:32,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:32,117 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:32,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:32,181 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 15 treesize of output 14 [2022-11-16 16:29:32,201 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 16 treesize of output 12 [2022-11-16 16:29:32,243 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 16:29:32,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:32,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:32,358 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:32,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:32,450 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 15 treesize of output 14 [2022-11-16 16:29:32,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:33,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1753#(and (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_25| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_25|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_25|) 0) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_25|)) (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_25|) (* |ULTIMATE.start_main_~i~1#1| 4)))))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:33,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:33,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:33,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 17 [2022-11-16 16:29:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489490406] [2022-11-16 16:29:33,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:33,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 16:29:33,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 16:29:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:29:33,203 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-11-16 16:29:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:33,380 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-16 16:29:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:29:33,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:29:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:33,382 INFO L225 Difference]: With dead ends: 70 [2022-11-16 16:29:33,382 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 16:29:33,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:29:33,383 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:33,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 51 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-11-16 16:29:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 16:29:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-11-16 16:29:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-11-16 16:29:33,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 15 [2022-11-16 16:29:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:33,387 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-11-16 16:29:33,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-11-16 16:29:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-11-16 16:29:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:29:33,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:33,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2022-11-16 16:29:33,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 16:29:33,589 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1732662670, now seen corresponding path program 4 times [2022-11-16 16:29:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623457350] [2022-11-16 16:29:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:33,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623457350] [2022-11-16 16:29:33,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623457350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:33,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151974248] [2022-11-16 16:29:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:29:33,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:33,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:33,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:33,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 16:29:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:29:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:29:33,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151974248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420588465] [2022-11-16 16:29:33,808 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:33,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:33,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:33,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:33,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:33,856 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:33,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 16:29:33,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:34,039 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 15 treesize of output 14 [2022-11-16 16:29:34,086 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 16 treesize of output 12 [2022-11-16 16:29:34,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:34,218 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:34,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:34,284 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 15 treesize of output 14 [2022-11-16 16:29:34,315 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 16 treesize of output 12 [2022-11-16 16:29:34,340 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 15 treesize of output 14 [2022-11-16 16:29:34,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:34,448 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 15 treesize of output 14 [2022-11-16 16:29:34,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:34,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1993#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 32 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:34,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:34,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:34,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-16 16:29:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302817130] [2022-11-16 16:29:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:29:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:29:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:29:34,963 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-16 16:29:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:35,050 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-11-16 16:29:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:29:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 16:29:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:35,053 INFO L225 Difference]: With dead ends: 132 [2022-11-16 16:29:35,053 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 16:29:35,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:29:35,054 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:35,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 29 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 16:29:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 74. [2022-11-16 16:29:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-11-16 16:29:35,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 16 [2022-11-16 16:29:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:35,079 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-11-16 16:29:35,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-16 16:29:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-11-16 16:29:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 16:29:35,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:35,080 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2022-11-16 16:29:35,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 16:29:35,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash -162758757, now seen corresponding path program 2 times [2022-11-16 16:29:35,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:35,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446249591] [2022-11-16 16:29:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:35,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:35,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446249591] [2022-11-16 16:29:35,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446249591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823782532] [2022-11-16 16:29:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:35,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:35,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:29:35,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:29:35,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:29:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:35,497 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:29:35,497 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 16:29:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 16:29:35,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 16:29:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823782532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686596636] [2022-11-16 16:29:35,738 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:35,738 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:35,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:35,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:35,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:35,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:35,781 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:35,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 16:29:35,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:35,953 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 15 treesize of output 14 [2022-11-16 16:29:35,994 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 16 treesize of output 12 [2022-11-16 16:29:36,052 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 15 treesize of output 14 [2022-11-16 16:29:36,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:36,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:36,199 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 16 treesize of output 12 [2022-11-16 16:29:36,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:36,316 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:36,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:36,377 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 15 treesize of output 14 [2022-11-16 16:29:36,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:36,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2336#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (< |ULTIMATE.start_foo_~i~0#1| 32) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:36,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:36,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:36,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2022-11-16 16:29:36,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210402271] [2022-11-16 16:29:36,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:36,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:29:36,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:36,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:29:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:29:36,971 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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) [2022-11-16 16:29:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:37,625 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2022-11-16 16:29:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 16:29:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 16:29:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:37,626 INFO L225 Difference]: With dead ends: 99 [2022-11-16 16:29:37,627 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 16:29:37,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:29:37,628 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 235 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:37,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 12 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 16:29:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2022-11-16 16:29:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-16 16:29:37,632 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 20 [2022-11-16 16:29:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:37,632 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-16 16:29:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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) [2022-11-16 16:29:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-16 16:29:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 16:29:37,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:37,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:37,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:37,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1609380825, now seen corresponding path program 2 times [2022-11-16 16:29:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:37,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135408196] [2022-11-16 16:29:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:29:37,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135408196] [2022-11-16 16:29:37,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135408196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399505175] [2022-11-16 16:29:37,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:37,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:37,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:37,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:37,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 16:29:38,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:29:38,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:38,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:29:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:38,282 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_19| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int) (v_ArrVal_273 Int) (v_ArrVal_272 Int) (v_ArrVal_271 Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| v_ArrVal_272) |v_ULTIMATE.start_main_~#mask~0#1.base_19|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| v_ArrVal_271) |v_ULTIMATE.start_main_~#mask~0#1.base_19| v_ArrVal_273) |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_19| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0))) is different from true [2022-11-16 16:29:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 16:29:38,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:38,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399505175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:38,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:38,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-16 16:29:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326994698] [2022-11-16 16:29:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:38,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:29:38,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:29:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2022-11-16 16:29:38,291 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:38,295 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2022-11-16 16:29:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:29:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 16:29:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:38,296 INFO L225 Difference]: With dead ends: 67 [2022-11-16 16:29:38,296 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 16:29:38,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2022-11-16 16:29:38,297 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:38,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-11-16 16:29:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 16:29:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 16:29:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 65 states have internal predecessors, (80), 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) [2022-11-16 16:29:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2022-11-16 16:29:38,300 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 21 [2022-11-16 16:29:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:38,301 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2022-11-16 16:29:38,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2022-11-16 16:29:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 16:29:38,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:38,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 16:29:38,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:38,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 16:29:38,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -340099587, now seen corresponding path program 1 times [2022-11-16 16:29:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132091897] [2022-11-16 16:29:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:29:38,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132091897] [2022-11-16 16:29:38,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132091897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770075664] [2022-11-16 16:29:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:38,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:38,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:29:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:29:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:29:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:29:38,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770075664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677979421] [2022-11-16 16:29:38,862 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 16:29:38,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:38,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:38,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:38,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:38,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:38,901 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:38,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:29:39,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:39,072 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 15 treesize of output 14 [2022-11-16 16:29:39,114 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 16 treesize of output 12 [2022-11-16 16:29:39,149 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 15 treesize of output 14 [2022-11-16 16:29:39,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:39,273 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 15 treesize of output 14 [2022-11-16 16:29:39,295 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 16 treesize of output 12 [2022-11-16 16:29:39,388 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 16:29:39,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-16 16:29:39,450 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 15 treesize of output 14 [2022-11-16 16:29:39,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:39,561 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 15 treesize of output 14 [2022-11-16 16:29:39,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:40,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2907#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 (* |ULTIMATE.start_main_~i~1#1| 4)) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_27| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_27|) (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_27|)) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0))) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:40,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:40,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:40,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-16 16:29:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770162683] [2022-11-16 16:29:40,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:40,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:29:40,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:29:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:29:40,386 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-11-16 16:29:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:40,562 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-16 16:29:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:29:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 24 [2022-11-16 16:29:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:40,563 INFO L225 Difference]: With dead ends: 68 [2022-11-16 16:29:40,563 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 16:29:40,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:29:40,564 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:40,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 13 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 16:29:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-16 16:29:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-16 16:29:40,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 24 [2022-11-16 16:29:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:40,567 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-16 16:29:40,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-11-16 16:29:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-16 16:29:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 16:29:40,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:40,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 16:29:40,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 16:29:40,774 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -249644410, now seen corresponding path program 2 times [2022-11-16 16:29:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80578431] [2022-11-16 16:29:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:29:40,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80578431] [2022-11-16 16:29:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80578431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34939273] [2022-11-16 16:29:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:40,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:40,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:29:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:29:40,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:29:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:41,186 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_28| Int) (v_ArrVal_340 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int) (v_ArrVal_339 Int) (v_ArrVal_338 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28| v_ArrVal_338) |v_ULTIMATE.start_main_~#mask~0#1.base_21| v_ArrVal_340) |v_ULTIMATE.start_main_~#b~0#1.base_28| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28| v_ArrVal_339) |v_ULTIMATE.start_main_~#mask~0#1.base_21|) 0))) is different from true [2022-11-16 16:29:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 16:29:41,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:41,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34939273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:41,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:41,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2022-11-16 16:29:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842515481] [2022-11-16 16:29:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:29:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:29:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2022-11-16 16:29:41,189 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:29:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:41,191 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-11-16 16:29:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:29:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-16 16:29:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:41,192 INFO L225 Difference]: With dead ends: 67 [2022-11-16 16:29:41,193 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 16:29:41,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2022-11-16 16:29:41,193 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:41,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-11-16 16:29:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 16:29:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 16:29:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 65 states have internal predecessors, (75), 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) [2022-11-16 16:29:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-11-16 16:29:41,196 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 27 [2022-11-16 16:29:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:41,197 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-11-16 16:29:41,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:29:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-11-16 16:29:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 16:29:41,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:41,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-16 16:29:41,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:41,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 16:29:41,403 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash 850962182, now seen corresponding path program 1 times [2022-11-16 16:29:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95639791] [2022-11-16 16:29:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:29:41,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95639791] [2022-11-16 16:29:41,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95639791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227502877] [2022-11-16 16:29:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:41,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:41,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:41,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:29:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:29:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:29:41,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:41,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 16:29:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:29:42,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227502877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441546934] [2022-11-16 16:29:42,040 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 16:29:42,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:42,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:42,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:42,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:42,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:42,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:42,077 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:42,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:29:42,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:42,259 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 15 treesize of output 14 [2022-11-16 16:29:42,306 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 16 treesize of output 12 [2022-11-16 16:29:42,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:42,415 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:42,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:42,478 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 15 treesize of output 14 [2022-11-16 16:29:42,501 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 16 treesize of output 12 [2022-11-16 16:29:42,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:42,653 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:42,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:42,745 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 15 treesize of output 14 [2022-11-16 16:29:42,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:43,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3457#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:43,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:43,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:43,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2022-11-16 16:29:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044698555] [2022-11-16 16:29:43,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:43,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 16:29:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 16:29:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-11-16 16:29:43,576 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-11-16 16:29:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:43,840 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-11-16 16:29:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:29:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 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 28 [2022-11-16 16:29:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:43,842 INFO L225 Difference]: With dead ends: 73 [2022-11-16 16:29:43,842 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 16:29:43,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-11-16 16:29:43,843 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:43,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 56 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:29:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 16:29:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2022-11-16 16:29:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-11-16 16:29:43,849 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2022-11-16 16:29:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:43,850 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-11-16 16:29:43,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-11-16 16:29:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-11-16 16:29:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 16:29:43,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:43,851 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 1, 1] [2022-11-16 16:29:43,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:44,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1827126599, now seen corresponding path program 5 times [2022-11-16 16:29:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:44,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732497179] [2022-11-16 16:29:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:29:44,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732497179] [2022-11-16 16:29:44,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732497179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098693153] [2022-11-16 16:29:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:44,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:44,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 16:29:44,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:29:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:29:44,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:44,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:29:44,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:44,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 16:29:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 16:29:44,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 16:29:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098693153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762967259] [2022-11-16 16:29:44,715 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 16:29:44,716 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:44,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:44,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:44,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:44,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:44,752 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 16:29:44,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:44,953 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 15 treesize of output 14 [2022-11-16 16:29:44,986 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 16 treesize of output 12 [2022-11-16 16:29:45,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:45,111 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:45,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:45,182 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 15 treesize of output 14 [2022-11-16 16:29:45,205 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 16 treesize of output 12 [2022-11-16 16:29:45,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:45,292 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:45,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:45,353 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 15 treesize of output 14 [2022-11-16 16:29:45,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:45,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3834#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 32 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:45,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:45,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:45,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2022-11-16 16:29:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699747094] [2022-11-16 16:29:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:29:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:29:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:29:45,899 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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) [2022-11-16 16:29:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:46,934 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-11-16 16:29:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 16:29:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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 34 [2022-11-16 16:29:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:46,935 INFO L225 Difference]: With dead ends: 97 [2022-11-16 16:29:46,935 INFO L226 Difference]: Without dead ends: 97 [2022-11-16 16:29:46,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=718, Invalid=2588, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 16:29:46,937 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 367 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:46,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 8 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:29:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-16 16:29:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 57. [2022-11-16 16:29:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 56 states have internal predecessors, (60), 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) [2022-11-16 16:29:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-16 16:29:46,940 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 34 [2022-11-16 16:29:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-16 16:29:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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) [2022-11-16 16:29:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-16 16:29:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 16:29:46,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:46,942 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 4, 1, 1] [2022-11-16 16:29:46,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:47,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash 271440298, now seen corresponding path program 2 times [2022-11-16 16:29:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455740623] [2022-11-16 16:29:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:29:47,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455740623] [2022-11-16 16:29:47,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455740623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378706792] [2022-11-16 16:29:47,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:47,383 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:47,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 16:29:47,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:29:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:29:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:47,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:47,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:29:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 16:29:47,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:47,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378706792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:47,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:47,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2022-11-16 16:29:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581396136] [2022-11-16 16:29:47,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:47,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:29:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:29:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:29:47,761 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-16 16:29:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:47,824 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-11-16 16:29:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:29:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) Word has length 37 [2022-11-16 16:29:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:47,826 INFO L225 Difference]: With dead ends: 56 [2022-11-16 16:29:47,826 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 16:29:47,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:29:47,827 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:47,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 16:29:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-16 16:29:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-11-16 16:29:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-16 16:29:47,830 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2022-11-16 16:29:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:47,830 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-16 16:29:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-16 16:29:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-16 16:29:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 16:29:47,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:47,831 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2022-11-16 16:29:47,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:48,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:48,036 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -933490452, now seen corresponding path program 2 times [2022-11-16 16:29:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326470451] [2022-11-16 16:29:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:48,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 16:29:48,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326470451] [2022-11-16 16:29:48,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326470451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771529089] [2022-11-16 16:29:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:48,222 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 16:29:48,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:29:48,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:29:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:48,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:48,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:29:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-16 16:29:48,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771529089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:48,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:48,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2022-11-16 16:29:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910072029] [2022-11-16 16:29:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:29:48,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:29:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:29:48,553 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:48,596 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-11-16 16:29:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:29:48,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-16 16:29:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:48,600 INFO L225 Difference]: With dead ends: 54 [2022-11-16 16:29:48,600 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 16:29:48,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:29:48,602 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:48,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:29:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 16:29:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-16 16:29:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-16 16:29:48,609 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 40 [2022-11-16 16:29:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:48,610 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-16 16:29:48,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-16 16:29:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 16:29:48,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:48,612 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-16 16:29:48,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 16:29:48,818 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 299204984, now seen corresponding path program 1 times [2022-11-16 16:29:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:48,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164350918] [2022-11-16 16:29:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:29:48,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164350918] [2022-11-16 16:29:48,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164350918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330193843] [2022-11-16 16:29:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:48,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:49,001 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 16:29:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:29:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:29:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:29:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330193843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3228742] [2022-11-16 16:29:49,317 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 16:29:49,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:49,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:49,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:49,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:29:49,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:49,355 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 16:29:49,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:29:49,465 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 15 treesize of output 14 [2022-11-16 16:29:49,526 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 15 treesize of output 14 [2022-11-16 16:29:49,563 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 16 treesize of output 12 [2022-11-16 16:29:49,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 16:29:49,661 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-16 16:29:49,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 132 [2022-11-16 16:29:49,727 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 15 treesize of output 14 [2022-11-16 16:29:49,748 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 16 treesize of output 12 [2022-11-16 16:29:49,822 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 16:29:49,823 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 16:29:49,868 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 15 treesize of output 14 [2022-11-16 16:29:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 128 [2022-11-16 16:29:49,973 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 15 treesize of output 14 [2022-11-16 16:29:49,985 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:50,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4797#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#mask~0#1.base_22|) (= (select |#valid| |v_ULTIMATE.start_main_~#mask~0#1.base_22|) 0))) (<= 0 |#StackHeapBarrier|) (not (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32)) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:29:50,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:29:50,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:50,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-16 16:29:50,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939008646] [2022-11-16 16:29:50,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 16:29:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 16:29:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:29:50,762 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:51,009 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-11-16 16:29:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 16:29:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 16:29:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:51,010 INFO L225 Difference]: With dead ends: 59 [2022-11-16 16:29:51,010 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 16:29:51,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:29:51,011 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:51,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 7 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:29:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 16:29:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-16 16:29:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-11-16 16:29:51,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2022-11-16 16:29:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:51,014 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-11-16 16:29:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-11-16 16:29:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 16:29:51,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:51,015 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-16 16:29:51,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:51,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 16:29:51,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 16:29:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash -576752579, now seen corresponding path program 2 times [2022-11-16 16:29:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:51,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453413735] [2022-11-16 16:29:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 16:29:51,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453413735] [2022-11-16 16:29:51,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453413735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765700757] [2022-11-16 16:29:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:51,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:51,417 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 16:29:51,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:29:51,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:29:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:51,814 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_576 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_23|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_23| v_ArrVal_576) |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0))))) is different from true [2022-11-16 16:29:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-16 16:29:51,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:51,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765700757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:51,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:51,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-16 16:29:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792597971] [2022-11-16 16:29:51,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:51,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:29:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:29:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2022-11-16 16:29:51,817 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:29:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:51,820 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-11-16 16:29:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:29:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 16:29:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:51,821 INFO L225 Difference]: With dead ends: 56 [2022-11-16 16:29:51,821 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 16:29:51,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2022-11-16 16:29:51,822 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:51,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-16 16:29:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 16:29:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 16:29:51,823 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) [2022-11-16 16:29:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 16:29:51,823 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-11-16 16:29:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:51,823 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 16:29:51,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 16:29:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 16:29:51,824 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 16:29:51,826 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-11-16 16:29:51,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-16 16:29:51,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-16 16:29:51,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-16 16:29:51,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-16 16:29:51,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-11-16 16:29:51,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-11-16 16:29:51,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-16 16:29:51,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 16:29:52,037 INFO L444 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:52,039 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 16:29:52,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 04:29:52 BoogieIcfgContainer [2022-11-16 16:29:52,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 16:29:52,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 16:29:52,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 16:29:52,043 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 16:29:52,043 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:29:15" (3/4) ... [2022-11-16 16:29:52,046 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 16:29:52,054 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-11-16 16:29:52,054 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-16 16:29:52,054 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 16:29:52,055 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 16:29:52,084 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 16:29:52,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 16:29:52,085 INFO L158 Benchmark]: Toolchain (without parser) took 37123.15ms. Allocated memory was 115.3MB in the beginning and 394.3MB in the end (delta: 278.9MB). Free memory was 80.8MB in the beginning and 314.1MB in the end (delta: -233.4MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,085 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory was 86.0MB in the beginning and 86.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:29:52,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.07ms. Allocated memory is still 115.3MB. Free memory was 80.4MB in the beginning and 91.2MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.45ms. Allocated memory is still 115.3MB. Free memory was 91.2MB in the beginning and 89.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,086 INFO L158 Benchmark]: Boogie Preprocessor took 35.67ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:29:52,086 INFO L158 Benchmark]: RCFGBuilder took 473.60ms. Allocated memory is still 115.3MB. Free memory was 88.6MB in the beginning and 74.5MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,087 INFO L158 Benchmark]: TraceAbstraction took 36248.90ms. Allocated memory was 115.3MB in the beginning and 394.3MB in the end (delta: 278.9MB). Free memory was 74.0MB in the beginning and 317.3MB in the end (delta: -243.3MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,087 INFO L158 Benchmark]: Witness Printer took 42.17ms. Allocated memory is still 394.3MB. Free memory was 316.2MB in the beginning and 314.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:29:52,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory was 86.0MB in the beginning and 86.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.07ms. Allocated memory is still 115.3MB. Free memory was 80.4MB in the beginning and 91.2MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.45ms. Allocated memory is still 115.3MB. Free memory was 91.2MB in the beginning and 89.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.67ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 473.60ms. Allocated memory is still 115.3MB. Free memory was 88.6MB in the beginning and 74.5MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 36248.90ms. Allocated memory was 115.3MB in the beginning and 394.3MB in the end (delta: 278.9MB). Free memory was 74.0MB in the beginning and 317.3MB in the end (delta: -243.3MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. * Witness Printer took 42.17ms. Allocated memory is still 394.3MB. Free memory was 316.2MB in the beginning and 314.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: 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, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 36.2s, OverallIterations: 24, TraceHistogramMax: 8, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1290 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1290 mSDsluCounter, 401 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 54 IncrementalHoareTripleChecker+Unchecked, 266 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1912 IncrementalHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 135 mSDtfsCounter, 1912 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1126 GetRequests, 724 SyntacticMatches, 30 SemanticMatches, 372 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2969 ImplicationChecksByTransitivity, 12.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=14, InterpolantAutomatonStates: 193, 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, 24 MinimizatonAttempts, 283 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 893 NumberOfCodeBlocks, 719 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1097 ConstructedInterpolants, 97 QuantifiedInterpolants, 8501 SizeOfPredicates, 77 NumberOfNonLiveVariables, 2359 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 57 InterpolantComputations, 10 PerfectInterpolantSequences, 1195/1906 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 4, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME: 0.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 20, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 38, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 16:29:52,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512c4245-a15d-47ec-8125-a4e400f48786/bin/utaipan-Xvt2sAort0/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