./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcspn_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcspn_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dea536aba24bbbd149deffc3b8406a97f6fac760a5b2f50471455440f523d7fc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:18:12,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:18:12,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:18:12,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:18:12,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:18:12,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:18:12,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:18:12,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:18:12,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:18:12,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:18:12,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:18:12,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:18:12,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:18:12,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:18:12,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:18:12,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:18:12,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:18:12,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:18:12,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:18:12,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:18:12,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:18:12,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:18:12,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:18:12,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:18:12,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:18:12,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:18:12,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:18:12,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:18:12,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:18:12,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:18:12,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:18:12,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:18:12,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:18:12,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:18:12,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:18:12,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:18:12,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:18:12,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:18:12,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:18:12,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:18:12,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:18:12,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 06:18:12,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:18:12,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:18:12,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:18:12,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:18:12,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:18:12,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:18:12,838 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:18:12,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:18:12,838 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:18:12,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:18:12,839 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:18:12,839 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:18:12,839 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:18:12,839 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:18:12,839 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:18:12,840 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:18:12,840 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:18:12,840 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:18:12,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:18:12,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:18:12,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:18:12,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:18:12,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:18:12,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:18:12,842 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:18:12,842 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:18:12,842 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:18:12,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:18:12,842 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:18:12,843 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:18:12,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:18:12,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:18:12,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:12,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:18:12,843 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:18:12,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:18:12,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:18:12,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:18:12,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:18:12,844 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_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea536aba24bbbd149deffc3b8406a97f6fac760a5b2f50471455440f523d7fc [2022-12-14 06:18:13,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:18:13,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:18:13,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:18:13,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:18:13,055 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:18:13,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-15/cstrcspn_malloc.i [2022-12-14 06:18:15,622 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:18:15,819 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:18:15,820 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/sv-benchmarks/c/termination-15/cstrcspn_malloc.i [2022-12-14 06:18:15,826 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/data/fbb453455/9dbdeba3315c40e997ed5c2ea1673a8a/FLAGb0fe777c0 [2022-12-14 06:18:16,207 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/data/fbb453455/9dbdeba3315c40e997ed5c2ea1673a8a [2022-12-14 06:18:16,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:18:16,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:18:16,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:16,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:18:16,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:18:16,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c02c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16, skipping insertion in model container [2022-12-14 06:18:16,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:18:16,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:18:16,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:16,438 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:18:16,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:16,484 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:18:16,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16 WrapperNode [2022-12-14 06:18:16,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:16,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:16,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:18:16,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:18:16,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,512 INFO L138 Inliner]: procedures = 152, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-12-14 06:18:16,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:16,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:18:16,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:18:16,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:18:16,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:18:16,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:18:16,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:18:16,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:18:16,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (1/1) ... [2022-12-14 06:18:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:16,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:16,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:18:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:18:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:18:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:18:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:18:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:18:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:18:16,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:18:16,648 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:18:16,649 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:18:16,838 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:18:16,871 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:18:16,871 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:18:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:16 BoogieIcfgContainer [2022-12-14 06:18:16,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:18:16,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:18:16,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:18:16,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:18:16,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:18:16" (1/3) ... [2022-12-14 06:18:16,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468dcf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:16, skipping insertion in model container [2022-12-14 06:18:16,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:16" (2/3) ... [2022-12-14 06:18:16,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468dcf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:16, skipping insertion in model container [2022-12-14 06:18:16,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:16" (3/3) ... [2022-12-14 06:18:16,879 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn_malloc.i [2022-12-14 06:18:16,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:18:16,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-12-14 06:18:16,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:18:16,930 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;@39a493b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:18:16,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-12-14 06:18:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:18:16,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:16,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:18:16,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 4295, now seen corresponding path program 1 times [2022-12-14 06:18:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:16,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933983620] [2022-12-14 06:18:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933983620] [2022-12-14 06:18:17,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933983620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684216363] [2022-12-14 06:18:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:17,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,193 INFO L87 Difference]: Start difference. First operand has 43 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,244 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-12-14 06:18:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 06:18:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,252 INFO L225 Difference]: With dead ends: 41 [2022-12-14 06:18:17,252 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 06:18:17,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,255 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 06:18:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 06:18:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-14 06:18:17,279 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 2 [2022-12-14 06:18:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,280 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-14 06:18:17,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-14 06:18:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:18:17,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:18:17,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:18:17,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 4296, now seen corresponding path program 1 times [2022-12-14 06:18:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283946010] [2022-12-14 06:18:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283946010] [2022-12-14 06:18:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283946010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88020547] [2022-12-14 06:18:17,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,418 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,456 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-12-14 06:18:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 06:18:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,457 INFO L225 Difference]: With dead ends: 38 [2022-12-14 06:18:17,457 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 06:18:17,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,458 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 06:18:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 06:18:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-12-14 06:18:17,462 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 2 [2022-12-14 06:18:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,462 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-12-14 06:18:17,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-12-14 06:18:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:18:17,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:18:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:18:17,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash 133134, now seen corresponding path program 1 times [2022-12-14 06:18:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907537922] [2022-12-14 06:18:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907537922] [2022-12-14 06:18:17,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907537922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213334500] [2022-12-14 06:18:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:17,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,495 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,525 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-12-14 06:18:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 06:18:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,526 INFO L225 Difference]: With dead ends: 37 [2022-12-14 06:18:17,526 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 06:18:17,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,528 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 06:18:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 06:18:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-12-14 06:18:17,533 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 3 [2022-12-14 06:18:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,533 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-12-14 06:18:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-12-14 06:18:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:18:17,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:18:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:18:17,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 133135, now seen corresponding path program 1 times [2022-12-14 06:18:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409442136] [2022-12-14 06:18:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409442136] [2022-12-14 06:18:17,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409442136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731321129] [2022-12-14 06:18:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,669 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,702 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-12-14 06:18:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 06:18:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,703 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:18:17,703 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 06:18:17,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:17,705 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 06:18:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 06:18:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-12-14 06:18:17,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 3 [2022-12-14 06:18:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-12-14 06:18:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-12-14 06:18:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:18:17,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:18:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:18:17,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 4129692, now seen corresponding path program 1 times [2022-12-14 06:18:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403132293] [2022-12-14 06:18:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403132293] [2022-12-14 06:18:17,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403132293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:17,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037845127] [2022-12-14 06:18:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:18:17,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:18:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:18:17,758 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-12-14 06:18:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,793 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-12-14 06:18:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:18:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 [2022-12-14 06:18:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,793 INFO L225 Difference]: With dead ends: 33 [2022-12-14 06:18:17,793 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 06:18:17,794 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 [2022-12-14 06:18:17,794 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 06:18:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 06:18:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 32 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) [2022-12-14 06:18:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-12-14 06:18:17,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 4 [2022-12-14 06:18:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,797 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-12-14 06:18:17,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-12-14 06:18:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-12-14 06:18:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:18:17,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:18:17,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:18:17,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 4129693, now seen corresponding path program 1 times [2022-12-14 06:18:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328784519] [2022-12-14 06:18:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328784519] [2022-12-14 06:18:17,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328784519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:17,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031316057] [2022-12-14 06:18:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:18:17,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:18:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:17,859 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-12-14 06:18:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:17,924 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-12-14 06:18:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:18:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-12-14 06:18:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:17,925 INFO L225 Difference]: With dead ends: 61 [2022-12-14 06:18:17,925 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 06:18:17,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:18:17,926 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:17,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 32 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 06:18:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2022-12-14 06:18:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-12-14 06:18:17,931 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 4 [2022-12-14 06:18:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,931 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-12-14 06:18:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-12-14 06:18:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-12-14 06:18:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:18:17,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:17,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:18:17,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1526392209, now seen corresponding path program 1 times [2022-12-14 06:18:17,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471153161] [2022-12-14 06:18:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:17,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471153161] [2022-12-14 06:18:17,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471153161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:17,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:17,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567786417] [2022-12-14 06:18:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:18:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:18:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:18:17,987 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-12-14 06:18:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:18,020 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-12-14 06:18:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:18:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-12-14 06:18:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:18,020 INFO L225 Difference]: With dead ends: 39 [2022-12-14 06:18:18,020 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 06:18:18,021 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 [2022-12-14 06:18:18,021 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:18,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 06:18:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-12-14 06:18:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 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) [2022-12-14 06:18:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-14 06:18:18,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 7 [2022-12-14 06:18:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:18,023 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-14 06:18:18,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-12-14 06:18:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-14 06:18:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:18:18,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:18,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:18,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:18:18,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:18,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1526392208, now seen corresponding path program 1 times [2022-12-14 06:18:18,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:18,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486870444] [2022-12-14 06:18:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:18,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:18,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:18,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486870444] [2022-12-14 06:18:18,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486870444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:18,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:18,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179166110] [2022-12-14 06:18:18,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:18:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:18:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:18,128 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2022-12-14 06:18:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:18,215 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-12-14 06:18:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:18:18,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2022-12-14 06:18:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:18,216 INFO L225 Difference]: With dead ends: 55 [2022-12-14 06:18:18,216 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 06:18:18,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:18,217 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:18,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 06:18:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2022-12-14 06:18:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-14 06:18:18,219 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 7 [2022-12-14 06:18:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:18,219 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-14 06:18:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2022-12-14 06:18:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-14 06:18:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:18:18,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:18,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:18:18,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2013466919, now seen corresponding path program 1 times [2022-12-14 06:18:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503229269] [2022-12-14 06:18:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:18,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503229269] [2022-12-14 06:18:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503229269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:18,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:18,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347715415] [2022-12-14 06:18:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:18,244 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:18,259 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-12-14 06:18:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:18,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:18:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:18,260 INFO L225 Difference]: With dead ends: 37 [2022-12-14 06:18:18,260 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 06:18:18,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:18,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:18,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 06:18:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 06:18:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-14 06:18:18,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 9 [2022-12-14 06:18:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:18,263 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-14 06:18:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-14 06:18:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:18:18,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:18,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:18:18,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1929813473, now seen corresponding path program 1 times [2022-12-14 06:18:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:18,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721800588] [2022-12-14 06:18:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:18,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:18,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:18,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721800588] [2022-12-14 06:18:18,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721800588] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:18,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:18,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825393032] [2022-12-14 06:18:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:18,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:18,284 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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) [2022-12-14 06:18:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:18,299 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-12-14 06:18:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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 10 [2022-12-14 06:18:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:18,300 INFO L225 Difference]: With dead ends: 39 [2022-12-14 06:18:18,300 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 06:18:18,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:18,301 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 06:18:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 06:18:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-12-14 06:18:18,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 10 [2022-12-14 06:18:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:18,303 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-12-14 06:18:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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) [2022-12-14 06:18:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-12-14 06:18:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:18:18,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:18,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:18,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:18:18,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 305180871, now seen corresponding path program 1 times [2022-12-14 06:18:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076077637] [2022-12-14 06:18:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:18,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076077637] [2022-12-14 06:18:18,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076077637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588268464] [2022-12-14 06:18:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:18,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:18,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:18:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 06:18:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:18,661 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 14 treesize of output 10 [2022-12-14 06:18:18,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:18,824 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 32 treesize of output 29 [2022-12-14 06:18:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:18,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:19,113 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 13 treesize of output 11 [2022-12-14 06:18:19,119 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 22 treesize of output 20 [2022-12-14 06:18:19,125 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 31 treesize of output 23 [2022-12-14 06:18:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588268464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624762390] [2022-12-14 06:18:19,152 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:18:19,153 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:19,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:19,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:19,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:18:19,229 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 14 treesize of output 10 [2022-12-14 06:18:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:18:19,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:20,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '951#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:20,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:20,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:20,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-14 06:18:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266148745] [2022-12-14 06:18:20,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:20,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:18:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:18:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:18:20,699 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-12-14 06:18:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:21,171 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2022-12-14 06:18:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:18:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 11 [2022-12-14 06:18:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:21,176 INFO L225 Difference]: With dead ends: 104 [2022-12-14 06:18:21,176 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 06:18:21,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 06:18:21,177 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 396 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:21,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 269 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 06:18:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 36. [2022-12-14 06:18:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4) internal successors, (42), 35 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) [2022-12-14 06:18:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 06:18:21,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-12-14 06:18:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:21,181 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 06:18:21,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-12-14 06:18:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 06:18:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:18:21,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:21,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:21,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:21,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:21,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash 875086992, now seen corresponding path program 1 times [2022-12-14 06:18:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:21,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122686308] [2022-12-14 06:18:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:21,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122686308] [2022-12-14 06:18:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122686308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485269943] [2022-12-14 06:18:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:21,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:21,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:21,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:18:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 06:18:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:21,707 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 [2022-12-14 06:18:21,729 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 14 treesize of output 10 [2022-12-14 06:18:21,774 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 17 treesize of output 19 [2022-12-14 06:18:21,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:21,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 06:18:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:21,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:22,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:22,068 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-12-14 06:18:22,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:22,078 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 33 treesize of output 34 [2022-12-14 06:18:22,085 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 9 treesize of output 7 [2022-12-14 06:18:22,091 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 16 treesize of output 12 [2022-12-14 06:18:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:22,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485269943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454411548] [2022-12-14 06:18:22,128 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:18:22,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:22,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:22,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:22,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:22,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:18:22,183 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 14 treesize of output 10 [2022-12-14 06:18:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:22,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:18:22,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:23,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1200#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:23,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:23,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:23,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-14 06:18:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745795594] [2022-12-14 06:18:23,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:23,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 06:18:23,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 06:18:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:18:23,094 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:23,541 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2022-12-14 06:18:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:18:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 06:18:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:23,542 INFO L225 Difference]: With dead ends: 99 [2022-12-14 06:18:23,542 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 06:18:23,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 06:18:23,543 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 546 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:23,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 88 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:18:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 06:18:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2022-12-14 06:18:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 47 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) [2022-12-14 06:18:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-12-14 06:18:23,545 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 12 [2022-12-14 06:18:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:23,545 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-12-14 06:18:23,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-12-14 06:18:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:18:23,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:23,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:23,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:18:23,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:18:23,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash -320157746, now seen corresponding path program 1 times [2022-12-14 06:18:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136779108] [2022-12-14 06:18:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:23,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:23,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136779108] [2022-12-14 06:18:23,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136779108] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:23,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:23,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:18:23,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722867618] [2022-12-14 06:18:23,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:23,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:23,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:23,783 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:23,794 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-12-14 06:18:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 12 [2022-12-14 06:18:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:23,794 INFO L225 Difference]: With dead ends: 47 [2022-12-14 06:18:23,794 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 06:18:23,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:23,795 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:23,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 06:18:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 06:18:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.372093023255814) internal successors, (59), 46 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) [2022-12-14 06:18:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-12-14 06:18:23,798 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 12 [2022-12-14 06:18:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:23,798 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-12-14 06:18:23,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-12-14 06:18:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 06:18:23,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:23,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:23,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:18:23,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1334955413, now seen corresponding path program 1 times [2022-12-14 06:18:23,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:23,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063196610] [2022-12-14 06:18:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:23,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:23,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063196610] [2022-12-14 06:18:23,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063196610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:23,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:23,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530161268] [2022-12-14 06:18:23,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:23,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:18:23,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:18:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:23,866 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-12-14 06:18:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:23,882 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-12-14 06:18:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:18:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 13 [2022-12-14 06:18:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:23,882 INFO L225 Difference]: With dead ends: 46 [2022-12-14 06:18:23,882 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 06:18:23,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:23,883 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:23,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 06:18:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 06:18:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 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) [2022-12-14 06:18:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-12-14 06:18:23,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 13 [2022-12-14 06:18:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:23,886 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-12-14 06:18:23,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-12-14 06:18:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-12-14 06:18:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:18:23,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:23,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:18:23,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1566055281, now seen corresponding path program 1 times [2022-12-14 06:18:23,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:23,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813574659] [2022-12-14 06:18:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:24,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813574659] [2022-12-14 06:18:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813574659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:24,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:24,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500335246] [2022-12-14 06:18:24,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:24,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:18:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:18:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:24,006 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:24,080 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-12-14 06:18:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:18:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 [2022-12-14 06:18:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:24,081 INFO L225 Difference]: With dead ends: 45 [2022-12-14 06:18:24,081 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 06:18:24,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:24,082 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:24,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 06:18:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 06:18:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-12-14 06:18:24,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 14 [2022-12-14 06:18:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:24,085 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-12-14 06:18:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-12-14 06:18:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:18:24,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:24,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:18:24,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 946553758, now seen corresponding path program 2 times [2022-12-14 06:18:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:24,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636567435] [2022-12-14 06:18:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:24,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636567435] [2022-12-14 06:18:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636567435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767751099] [2022-12-14 06:18:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:18:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:24,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:18:24,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:18:24,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:18:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:24,459 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 06:18:24,459 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 11 treesize of output 17 [2022-12-14 06:18:24,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-12-14 06:18:24,747 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-12-14 06:18:24,747 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 23 treesize of output 20 [2022-12-14 06:18:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:24,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:25,094 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 13 treesize of output 11 [2022-12-14 06:18:25,098 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 22 treesize of output 20 [2022-12-14 06:18:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:25,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767751099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277873429] [2022-12-14 06:18:25,142 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:18:25,143 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:25,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:25,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:25,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:25,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:18:25,183 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 14 treesize of output 10 [2022-12-14 06:18:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:25,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:18:25,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:26,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1761#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:26,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:26,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:26,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-14 06:18:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948723568] [2022-12-14 06:18:26,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:18:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:18:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:18:26,599 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:27,760 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-12-14 06:18:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 06:18:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 06:18:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:27,761 INFO L225 Difference]: With dead ends: 85 [2022-12-14 06:18:27,761 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 06:18:27,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 06:18:27,761 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 298 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:27,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 12 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:18:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 06:18:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 25. [2022-12-14 06:18:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-14 06:18:27,763 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-12-14 06:18:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:27,763 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-14 06:18:27,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-14 06:18:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:18:27,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:27,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 06:18:27,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:18:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:18:27,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2135417475, now seen corresponding path program 2 times [2022-12-14 06:18:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401058014] [2022-12-14 06:18:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:27,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:28,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:28,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401058014] [2022-12-14 06:18:28,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401058014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:28,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855759313] [2022-12-14 06:18:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:18:28,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:28,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:18:28,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:18:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 06:18:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:28,381 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 [2022-12-14 06:18:28,399 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 14 treesize of output 10 [2022-12-14 06:18:28,431 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 17 treesize of output 19 [2022-12-14 06:18:29,631 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-12-14 06:18:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2022-12-14 06:18:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:29,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:34,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:34,171 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 32 [2022-12-14 06:18:34,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:34,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 71 [2022-12-14 06:18:34,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:34,206 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 19 treesize of output 23 [2022-12-14 06:18:34,214 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 16 treesize of output 12 [2022-12-14 06:18:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:34,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855759313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756953680] [2022-12-14 06:18:34,306 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:18:34,306 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:34,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:34,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:34,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:34,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:18:34,342 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 14 treesize of output 10 [2022-12-14 06:18:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:34,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:18:34,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:35,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2048#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:35,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:35,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:35,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-12-14 06:18:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108276480] [2022-12-14 06:18:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:18:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:18:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1178, Unknown=1, NotChecked=0, Total=1332 [2022-12-14 06:18:35,366 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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) [2022-12-14 06:18:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:39,992 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-12-14 06:18:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:18:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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) Word has length 20 [2022-12-14 06:18:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:39,993 INFO L225 Difference]: With dead ends: 64 [2022-12-14 06:18:39,993 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 06:18:39,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=425, Invalid=2226, Unknown=1, NotChecked=0, Total=2652 [2022-12-14 06:18:39,994 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 476 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:39,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 110 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:18:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 06:18:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2022-12-14 06:18:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-12-14 06:18:39,996 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 20 [2022-12-14 06:18:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:39,996 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-12-14 06:18:39,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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) [2022-12-14 06:18:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-12-14 06:18:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:18:39,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:39,997 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2022-12-14 06:18:40,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:18:40,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:40,198 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:18:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1176726108, now seen corresponding path program 3 times [2022-12-14 06:18:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822433491] [2022-12-14 06:18:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:40,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:40,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822433491] [2022-12-14 06:18:40,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822433491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422156697] [2022-12-14 06:18:40,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:18:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:40,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:40,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:18:40,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:18:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:40,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 06:18:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:40,747 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 [2022-12-14 06:18:40,770 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 14 treesize of output 10 [2022-12-14 06:18:40,809 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 16 treesize of output 18 [2022-12-14 06:18:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:43,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:43,184 INFO L321 Elim1Store]: treesize reduction 114, result has 50.6 percent of original size [2022-12-14 06:18:43,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 81 treesize of output 149 [2022-12-14 06:18:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:43,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:46,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:46,120 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 90 [2022-12-14 06:18:46,232 INFO L321 Elim1Store]: treesize reduction 20, result has 83.2 percent of original size [2022-12-14 06:18:46,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 209 treesize of output 254 [2022-12-14 06:18:46,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:18:46,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 134 treesize of output 204 [2022-12-14 06:18:46,341 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 16 treesize of output 12 [2022-12-14 06:18:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422156697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224415744] [2022-12-14 06:18:47,052 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:18:47,053 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:47,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:47,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:47,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:47,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:18:47,085 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 14 treesize of output 10 [2022-12-14 06:18:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:47,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:18:47,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:49,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2533#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:49,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:49,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:49,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 30, 28] total 68 [2022-12-14 06:18:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508239818] [2022-12-14 06:18:49,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 06:18:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 06:18:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=5333, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 06:18:49,398 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 70 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:12,018 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2022-12-14 06:19:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-14 06:19:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 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 44 [2022-12-14 06:19:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:12,019 INFO L225 Difference]: With dead ends: 178 [2022-12-14 06:19:12,019 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 06:19:12,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8464 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=3981, Invalid=23409, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 06:19:12,023 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1793 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:12,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 172 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 06:19:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 06:19:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2022-12-14 06:19:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 114 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2022-12-14 06:19:12,026 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 44 [2022-12-14 06:19:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:12,026 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2022-12-14 06:19:12,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2022-12-14 06:19:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 06:19:12,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:12,027 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 7, 2, 2, 1, 1, 1, 1] [2022-12-14 06:19:12,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:19:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:19:12,229 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:19:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash -927014128, now seen corresponding path program 1 times [2022-12-14 06:19:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:19:12,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430198787] [2022-12-14 06:19:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:19:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-14 06:19:12,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:19:12,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430198787] [2022-12-14 06:19:12,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430198787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:12,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780393952] [2022-12-14 06:19:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:12,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:12,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:12,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:19:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 06:19:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:12,590 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 6 treesize of output 5 [2022-12-14 06:19:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-14 06:19:12,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-14 06:19:12,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780393952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:19:12,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288594310] [2022-12-14 06:19:12,725 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:19:12,725 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:19:12,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:19:12,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:19:12,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:19:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:12,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:19:12,766 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 14 treesize of output 10 [2022-12-14 06:19:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:12,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:19:13,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:19:13,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3488#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:19:13,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:19:13,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:19:13,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-12-14 06:19:13,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190421581] [2022-12-14 06:19:13,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:19:13,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:19:13,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:19:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:19:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:19:13,931 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-12-14 06:19:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:14,171 INFO L93 Difference]: Finished difference Result 280 states and 324 transitions. [2022-12-14 06:19:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:19:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 78 [2022-12-14 06:19:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:14,172 INFO L225 Difference]: With dead ends: 280 [2022-12-14 06:19:14,172 INFO L226 Difference]: Without dead ends: 280 [2022-12-14 06:19:14,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-12-14 06:19:14,173 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 93 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:14,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:19:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-14 06:19:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 221. [2022-12-14 06:19:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1590909090909092) internal successors, (255), 220 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2022-12-14 06:19:14,176 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 78 [2022-12-14 06:19:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:14,177 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2022-12-14 06:19:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-12-14 06:19:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2022-12-14 06:19:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 06:19:14,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:14,178 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2022-12-14 06:19:14,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:19:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:14,380 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:19:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 781742864, now seen corresponding path program 2 times [2022-12-14 06:19:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:19:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655183951] [2022-12-14 06:19:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:19:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 98 proven. 3 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 06:19:14,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:19:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655183951] [2022-12-14 06:19:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655183951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755665106] [2022-12-14 06:19:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:19:14,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:14,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:14,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:19:14,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 06:19:14,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:19:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 06:19:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:14,887 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 6 treesize of output 5 [2022-12-14 06:19:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 56 proven. 45 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 06:19:15,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 06:19:15,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755665106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:19:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124900490] [2022-12-14 06:19:15,240 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:19:15,240 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:19:15,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:19:15,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:19:15,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:19:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:15,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:19:15,275 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 14 treesize of output 10 [2022-12-14 06:19:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:15,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:19:15,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:19:16,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4529#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:19:16,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:19:16,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:19:16,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-12-14 06:19:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841456117] [2022-12-14 06:19:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:19:16,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:19:16,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:19:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:19:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:19:16,732 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2022-12-14 06:19:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:16,948 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2022-12-14 06:19:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:19:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) Word has length 84 [2022-12-14 06:19:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:16,949 INFO L225 Difference]: With dead ends: 280 [2022-12-14 06:19:16,949 INFO L226 Difference]: Without dead ends: 280 [2022-12-14 06:19:16,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 232 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:19:16,950 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 71 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:16,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 33 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:19:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-14 06:19:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 221. [2022-12-14 06:19:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1136363636363635) internal successors, (245), 220 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2022-12-14 06:19:16,953 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 84 [2022-12-14 06:19:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:16,953 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2022-12-14 06:19:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2022-12-14 06:19:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2022-12-14 06:19:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 06:19:16,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:16,954 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1] [2022-12-14 06:19:16,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:19:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:17,156 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:19:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1637724232, now seen corresponding path program 1 times [2022-12-14 06:19:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:19:17,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135765192] [2022-12-14 06:19:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:19:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:19:18,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:19:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135765192] [2022-12-14 06:19:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135765192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868775304] [2022-12-14 06:19:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:18,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:18,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:18,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:19:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 06:19:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:18,312 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 [2022-12-14 06:19:18,342 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 14 treesize of output 10 [2022-12-14 06:19:18,392 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 16 treesize of output 18 [2022-12-14 06:19:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:20,868 INFO L321 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2022-12-14 06:19:20,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 06:19:20,872 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-14 06:19:20,892 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 06:19:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:19:21,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:24,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:24,172 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 118 [2022-12-14 06:19:24,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:24,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 233 treesize of output 246 [2022-12-14 06:19:24,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 64 [2022-12-14 06:19:24,262 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 16 treesize of output 12 [2022-12-14 06:19:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:19:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868775304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:19:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180503395] [2022-12-14 06:19:24,376 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:19:24,376 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:19:24,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:19:24,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:19:24,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:19:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:24,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:19:24,410 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 14 treesize of output 10 [2022-12-14 06:19:24,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:24,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:19:24,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:19:27,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5634#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:19:27,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:19:27,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:19:27,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30, 30] total 74 [2022-12-14 06:19:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715558087] [2022-12-14 06:19:27,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:19:27,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 06:19:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:19:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 06:19:27,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=6428, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 06:19:27,358 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 76 states, 75 states have (on average 3.4) internal successors, (255), 75 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:42,273 INFO L93 Difference]: Finished difference Result 541 states and 607 transitions. [2022-12-14 06:19:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 06:19:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.4) internal successors, (255), 75 states have internal predecessors, (255), 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 85 [2022-12-14 06:19:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:42,274 INFO L225 Difference]: With dead ends: 541 [2022-12-14 06:19:42,274 INFO L226 Difference]: Without dead ends: 541 [2022-12-14 06:19:42,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 175 SyntacticMatches, 9 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2453, Invalid=17007, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 06:19:42,277 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1529 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:42,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 1190 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 06:19:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-12-14 06:19:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 361. [2022-12-14 06:19:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.1083333333333334) internal successors, (399), 360 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 399 transitions. [2022-12-14 06:19:42,282 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 399 transitions. Word has length 85 [2022-12-14 06:19:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:42,282 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 399 transitions. [2022-12-14 06:19:42,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.4) internal successors, (255), 75 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:19:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 399 transitions. [2022-12-14 06:19:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 06:19:42,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:42,283 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1] [2022-12-14 06:19:42,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:19:42,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:42,485 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:19:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash 35858867, now seen corresponding path program 4 times [2022-12-14 06:19:42,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:19:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138694550] [2022-12-14 06:19:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:19:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:19:44,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:19:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138694550] [2022-12-14 06:19:44,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138694550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528086009] [2022-12-14 06:19:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:19:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:44,237 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:44,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:19:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 157 conjunts are in the unsatisfiable core [2022-12-14 06:19:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:44,353 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 [2022-12-14 06:19:44,380 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 14 treesize of output 10 [2022-12-14 06:19:44,428 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 17 treesize of output 19 [2022-12-14 06:19:57,838 INFO L321 Elim1Store]: treesize reduction 68, result has 65.8 percent of original size [2022-12-14 06:19:57,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 153 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 18 case distinctions, treesize of input 188 treesize of output 205 [2022-12-14 06:19:57,850 WARN L718 sPolynomialRelations]: Constructing 262144(two to the power of 18 dual juncts. [2022-12-14 06:20:21,912 WARN L718 sPolynomialRelations]: Constructing 131072(two to the power of 17 dual juncts. [2022-12-14 06:20:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:20:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:52,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:20:52,619 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 413 treesize of output 226 [2022-12-14 06:20:52,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:20:52,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 153 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 18 case distinctions, treesize of input 458 treesize of output 561 [2022-12-14 06:20:52,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 153 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 127 [2022-12-14 06:20:52,819 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 16 treesize of output 12 [2022-12-14 06:20:53,191 WARN L718 sPolynomialRelations]: Constructing 262144(two to the power of 18 dual juncts. [2022-12-14 06:21:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:21:16,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528086009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:16,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406129766] [2022-12-14 06:21:16,712 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:21:16,713 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:21:16,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:21:16,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:21:16,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:21:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:21:16,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:21:16,747 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 14 treesize of output 10 [2022-12-14 06:21:16,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:21:16,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:21:17,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:21:23,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7676#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:21:23,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:21:23,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:21:23,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 57, 57] total 137 [2022-12-14 06:21:23,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934724435] [2022-12-14 06:21:23,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:21:23,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-12-14 06:21:23,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:21:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-12-14 06:21:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2298, Invalid=19163, Unknown=1, NotChecked=0, Total=21462 [2022-12-14 06:21:23,672 INFO L87 Difference]: Start difference. First operand 361 states and 399 transitions. Second operand has 139 states, 138 states have (on average 3.217391304347826) internal successors, (444), 138 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:32,206 INFO L93 Difference]: Finished difference Result 739 states and 815 transitions. [2022-12-14 06:22:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 06:22:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 138 states have (on average 3.217391304347826) internal successors, (444), 138 states have internal predecessors, (444), 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 148 [2022-12-14 06:22:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:32,208 INFO L225 Difference]: With dead ends: 739 [2022-12-14 06:22:32,208 INFO L226 Difference]: Without dead ends: 739 [2022-12-14 06:22:32,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 302 SyntacticMatches, 18 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18215 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=7605, Invalid=57164, Unknown=1, NotChecked=0, Total=64770 [2022-12-14 06:22:32,212 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4635 mSDsluCounter, 4106 mSDsCounter, 0 mSdLazyCounter, 7993 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4635 SdHoareTripleChecker+Valid, 4182 SdHoareTripleChecker+Invalid, 8031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 7993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:32,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4635 Valid, 4182 Invalid, 8031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 7993 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-12-14 06:22:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-12-14 06:22:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 721. [2022-12-14 06:22:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.1041666666666667) internal successors, (795), 720 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 795 transitions. [2022-12-14 06:22:32,220 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 795 transitions. Word has length 148 [2022-12-14 06:22:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:32,220 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 795 transitions. [2022-12-14 06:22:32,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 138 states have (on average 3.217391304347826) internal successors, (444), 138 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 795 transitions. [2022-12-14 06:22:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-12-14 06:22:32,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:32,223 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1] [2022-12-14 06:22:32,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:22:32,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 06:22:32,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 06:22:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1503853623, now seen corresponding path program 5 times [2022-12-14 06:22:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:32,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051296547] [2022-12-14 06:22:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:22:36,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051296547] [2022-12-14 06:22:36,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051296547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608074502] [2022-12-14 06:22:36,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:22:36,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:36,912 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:36,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29a4d8fb-8a02-4afd-beb6-7663576d857e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:22:37,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2022-12-14 06:22:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 401 conjunts are in the unsatisfiable core [2022-12-14 06:22:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:37,776 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 18 treesize of output 16 [2022-12-14 06:22:37,831 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 14 treesize of output 10 [2022-12-14 06:22:37,921 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 17 treesize of output 19