./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/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_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 36c3a12d89778d96e6058a4f11ff4e1483403bd2fab9b14de640491057c7f753 --- 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 13:28:50,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:28:50,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:28:50,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:28:50,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:28:50,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:28:50,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:28:50,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:28:50,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:28:50,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:28:50,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:28:50,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:28:50,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:28:50,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:28:50,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:28:50,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:28:50,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:28:50,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:28:50,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:28:50,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:28:50,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:28:50,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:28:50,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:28:50,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:28:50,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:28:50,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:28:50,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:28:50,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:28:50,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:28:50,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:28:50,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:28:50,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:28:50,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:28:50,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:28:50,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:28:50,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:28:50,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:28:50,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:28:50,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:28:50,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:28:50,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:28:50,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:28:50,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:28:50,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:28:50,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:28:50,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:28:50,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:28:50,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:28:50,850 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:28:50,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:28:50,851 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:28:50,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:28:50,851 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:28:50,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:28:50,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:28:50,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:28:50,852 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:28:50,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:28:50,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:28:50,852 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:28:50,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:28:50,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:28:50,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:28:50,854 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:28:50,854 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:28:50,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:28:50,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:28:50,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:28:50,855 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:28:50,855 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:28:50,855 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:28:50,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:28:50,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:28:50,856 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:28:50,856 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:28:50,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:28:50,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:28:50,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:28:50,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:28:50,857 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:28:50,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:28:50,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:28:50,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:28:50,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:28:50,858 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_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36c3a12d89778d96e6058a4f11ff4e1483403bd2fab9b14de640491057c7f753 [2022-12-14 13:28:51,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:28:51,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:28:51,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:28:51,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:28:51,075 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:28:51,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i [2022-12-14 13:28:53,600 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:28:53,777 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:28:53,778 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i [2022-12-14 13:28:53,785 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/data/683820041/1a324423af83405c9c4f9413b82b1380/FLAG5296a41e2 [2022-12-14 13:28:54,171 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/data/683820041/1a324423af83405c9c4f9413b82b1380 [2022-12-14 13:28:54,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:28:54,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:28:54,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:28:54,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:28:54,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:28:54,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c51d632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54, skipping insertion in model container [2022-12-14 13:28:54,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:28:54,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:28:54,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:28:54,382 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:28:54,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:28:54,427 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:28:54,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54 WrapperNode [2022-12-14 13:28:54,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:28:54,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:28:54,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:28:54,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:28:54,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,455 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-12-14 13:28:54,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:28:54,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:28:54,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:28:54,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:28:54,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:28:54,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:28:54,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:28:54,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:28:54,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (1/1) ... [2022-12-14 13:28:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:28:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:54,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:28:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:28:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:28:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:28:54,607 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:28:54,608 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:28:54,798 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:28:54,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:28:54,858 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:28:54,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:28:54 BoogieIcfgContainer [2022-12-14 13:28:54,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:28:54,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:28:54,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:28:54,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:28:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:28:54" (1/3) ... [2022-12-14 13:28:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d819649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:28:54, skipping insertion in model container [2022-12-14 13:28:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:54" (2/3) ... [2022-12-14 13:28:54,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d819649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:28:54, skipping insertion in model container [2022-12-14 13:28:54,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:28:54" (3/3) ... [2022-12-14 13:28:54,869 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca-1.i [2022-12-14 13:28:54,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:28:54,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-12-14 13:28:54,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:28:54,950 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;@77c8924c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:28:54,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-14 13:28:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 20 states have (on average 2.5) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:28:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:28:54,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:54,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:28:54,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash 157824, now seen corresponding path program 1 times [2022-12-14 13:28:54,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:54,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903635980] [2022-12-14 13:28:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:54,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:55,189 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 13:28:55,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903635980] [2022-12-14 13:28:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903635980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:55,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:28:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537382749] [2022-12-14 13:28:55,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:55,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:55,224 INFO L87 Difference]: Start difference. First operand has 44 states, 20 states have (on average 2.5) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:55,286 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-12-14 13:28:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:55,288 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 13:28:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:55,296 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:28:55,296 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:28:55,297 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 13:28:55,301 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:55,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:28:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 13:28:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 2.25) internal successors, (45), 40 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 13:28:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 13:28:55,331 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 3 [2022-12-14 13:28:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:55,332 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 13:28:55,332 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 13:28:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 13:28:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:28:55,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:55,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:28:55,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:28:55,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash 157825, now seen corresponding path program 1 times [2022-12-14 13:28:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:55,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959120050] [2022-12-14 13:28:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:55,554 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 13:28:55,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:55,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959120050] [2022-12-14 13:28:55,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959120050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:55,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:55,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432590808] [2022-12-14 13:28:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:28:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:28:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:55,558 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:55,612 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 13:28:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:55,613 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:28:55,613 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:28:55,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:55,614 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:55,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:28:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:28:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 20 states have (on average 2.2) internal successors, (44), 39 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 13:28:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 13:28:55,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2022-12-14 13:28:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:55,618 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 13:28:55,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 13:28:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:28:55,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:55,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:28:55,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:28:55,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 154499, now seen corresponding path program 1 times [2022-12-14 13:28:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646657787] [2022-12-14 13:28:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:55,732 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 13:28:55,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646657787] [2022-12-14 13:28:55,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646657787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:55,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:55,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:55,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777256440] [2022-12-14 13:28:55,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:28:55,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:28:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:55,734 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:55,838 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-12-14 13:28:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:28:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:55,839 INFO L225 Difference]: With dead ends: 78 [2022-12-14 13:28:55,839 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 13:28:55,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 13:28:55,841 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:55,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 13:28:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 42. [2022-12-14 13:28:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 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 13:28:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-12-14 13:28:55,847 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 3 [2022-12-14 13:28:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:55,847 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-12-14 13:28:55,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 13:28:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-12-14 13:28:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:28:55,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:55,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:28:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:28:55,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 4895093, now seen corresponding path program 1 times [2022-12-14 13:28:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:55,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304073126] [2022-12-14 13:28:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:55,894 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 13:28:55,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304073126] [2022-12-14 13:28:55,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304073126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:55,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:55,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:55,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970680301] [2022-12-14 13:28:55,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:55,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:55,896 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:55,935 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-12-14 13:28:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:28:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:55,936 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:28:55,936 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:28:55,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:55,938 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:55,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:28:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:28:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 35 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 13:28:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-14 13:28:55,942 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 4 [2022-12-14 13:28:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:55,942 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-14 13:28:55,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-14 13:28:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:28:55,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:55,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:28:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:28:55,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 4895094, now seen corresponding path program 1 times [2022-12-14 13:28:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27960200] [2022-12-14 13:28:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:56,003 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 13:28:56,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:56,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27960200] [2022-12-14 13:28:56,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27960200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:56,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:56,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:56,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399753434] [2022-12-14 13:28:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:56,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:56,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:56,005 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:56,040 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-12-14 13:28:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:56,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:28:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:56,041 INFO L225 Difference]: With dead ends: 30 [2022-12-14 13:28:56,041 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 13:28:56,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:56,042 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:56,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 13:28:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 13:28:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 13:28:56,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 4 [2022-12-14 13:28:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:56,046 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 13:28:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 13:28:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:28:56,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:56,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 13:28:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:28:56,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash 148561729, now seen corresponding path program 1 times [2022-12-14 13:28:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:56,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928744206] [2022-12-14 13:28:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:56,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928744206] [2022-12-14 13:28:56,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928744206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134902750] [2022-12-14 13:28:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:56,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:56,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:56,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:28:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:28:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:56,398 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 13:28:56,399 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 13:28:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:56,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:56,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134902750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:56,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234914032] [2022-12-14 13:28:56,631 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 13:28:56,631 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:28:56,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:28:56,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:28:56,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:28:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:56,678 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 13:28:56,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:28:56,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:28:56,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:28:56,812 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 21 treesize of output 1 [2022-12-14 13:28:56,820 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 21 treesize of output 1 [2022-12-14 13:28:56,829 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 13:28:56,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:28:57,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:28:57,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:28:57,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:28:57,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 13:28:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439679643] [2022-12-14 13:28:57,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:28:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:28:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:28:57,179 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:57,422 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-12-14 13:28:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:28:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:28:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:57,424 INFO L225 Difference]: With dead ends: 78 [2022-12-14 13:28:57,424 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 13:28:57,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:28:57,425 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 191 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:57,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 117 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 13:28:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 27. [2022-12-14 13:28:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 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 13:28:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-14 13:28:57,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 5 [2022-12-14 13:28:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:57,430 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-14 13:28:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-14 13:28:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:28:57,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:57,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:57,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:57,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash -196747943, now seen corresponding path program 1 times [2022-12-14 13:28:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105840750] [2022-12-14 13:28:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:57,831 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 13:28:57,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105840750] [2022-12-14 13:28:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105840750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:57,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:28:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869697134] [2022-12-14 13:28:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:57,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:28:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:28:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:28:57,833 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:57,873 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-12-14 13:28:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:28:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:28:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:57,873 INFO L225 Difference]: With dead ends: 37 [2022-12-14 13:28:57,873 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 13:28:57,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 13:28:57,874 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:57,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 13:28:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2022-12-14 13:28:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 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 13:28:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-14 13:28:57,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2022-12-14 13:28:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:57,876 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-14 13:28:57,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-14 13:28:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:28:57,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:57,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:57,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:28:57,877 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash -347984453, now seen corresponding path program 1 times [2022-12-14 13:28:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:57,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152994929] [2022-12-14 13:28:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:58,009 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 13:28:58,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152994929] [2022-12-14 13:28:58,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152994929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:58,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:58,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:28:58,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937342660] [2022-12-14 13:28:58,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:28:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:28:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:28:58,011 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 13:28:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:58,077 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 13:28:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:28:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 13:28:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:58,077 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:28:58,078 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 13:28:58,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:28:58,078 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:58,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 13:28:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 13:28:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 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 13:28:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 13:28:58,081 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2022-12-14 13:28:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:58,081 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 13:28:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 13:28:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 13:28:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:28:58,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:58,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:28:58,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:58,083 INFO L85 PathProgramCache]: Analyzing trace with hash -347984452, now seen corresponding path program 1 times [2022-12-14 13:28:58,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:58,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169160092] [2022-12-14 13:28:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:58,273 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 13:28:58,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169160092] [2022-12-14 13:28:58,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169160092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:58,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:58,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:28:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211703643] [2022-12-14 13:28:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:58,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:28:58,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:28:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:28:58,275 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 13:28:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:58,390 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-12-14 13:28:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:28:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 13:28:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:58,391 INFO L225 Difference]: With dead ends: 32 [2022-12-14 13:28:58,391 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 13:28:58,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:28:58,392 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:58,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 13:28:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-12-14 13:28:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 27 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 13:28:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-12-14 13:28:58,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10 [2022-12-14 13:28:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:58,395 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-12-14 13:28:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 13:28:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-12-14 13:28:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:28:58,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:58,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:58,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:28:58,396 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2097383878, now seen corresponding path program 1 times [2022-12-14 13:28:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034228859] [2022-12-14 13:28:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:58,786 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 13:28:58,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034228859] [2022-12-14 13:28:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034228859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:58,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:58,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:28:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824980519] [2022-12-14 13:28:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:28:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:28:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:28:58,787 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:58,892 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-14 13:28:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:28:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:58,893 INFO L225 Difference]: With dead ends: 31 [2022-12-14 13:28:58,893 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 13:28:58,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:28:58,893 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:58,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 13:28:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-12-14 13:28:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 13:28:58,896 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2022-12-14 13:28:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:58,896 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 13:28:58,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 13:28:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:28:58,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:58,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:28:58,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2097383877, now seen corresponding path program 1 times [2022-12-14 13:28:58,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:58,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779724501] [2022-12-14 13:28:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:59,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:59,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779724501] [2022-12-14 13:28:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779724501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:59,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:28:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740893141] [2022-12-14 13:28:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:59,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:28:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:28:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:28:59,216 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:59,547 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-12-14 13:28:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:28:59,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:59,549 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:28:59,549 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:28:59,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:28:59,550 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 200 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:59,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 24 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:28:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 28. [2022-12-14 13:28:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 27 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 13:28:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-12-14 13:28:59,553 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 11 [2022-12-14 13:28:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:59,553 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-12-14 13:28:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:28:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-12-14 13:28:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:28:59,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:59,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:28:59,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:28:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -652731599, now seen corresponding path program 1 times [2022-12-14 13:28:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764374350] [2022-12-14 13:28:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:59,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764374350] [2022-12-14 13:28:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764374350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:59,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 13:28:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176054333] [2022-12-14 13:28:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:28:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:28:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:28:59,804 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:00,096 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-12-14 13:29:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:29:00,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:29:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:00,098 INFO L225 Difference]: With dead ends: 49 [2022-12-14 13:29:00,098 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:29:00,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:29:00,098 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:00,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 104 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:29:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2022-12-14 13:29:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 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 13:29:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-12-14 13:29:00,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 15 [2022-12-14 13:29:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:00,101 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-12-14 13:29:00,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-12-14 13:29:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:29:00,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:00,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:00,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:29:00,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1192240200, now seen corresponding path program 1 times [2022-12-14 13:29:00,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:00,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811391863] [2022-12-14 13:29:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:00,153 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 13:29:00,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811391863] [2022-12-14 13:29:00,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811391863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:00,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:00,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:29:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95373803] [2022-12-14 13:29:00,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:00,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:29:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:29:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:00,155 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:00,210 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-12-14 13:29:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:29:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:29:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:00,211 INFO L225 Difference]: With dead ends: 38 [2022-12-14 13:29:00,211 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:29:00,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:00,212 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:00,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:29:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 13:29:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 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 13:29:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-12-14 13:29:00,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 16 [2022-12-14 13:29:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:00,215 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-12-14 13:29:00,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-12-14 13:29:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:29:00,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:00,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:29:00,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1192240201, now seen corresponding path program 1 times [2022-12-14 13:29:00,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390225720] [2022-12-14 13:29:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:00,910 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 13:29:00,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:00,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390225720] [2022-12-14 13:29:00,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390225720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:00,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:00,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:29:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275887135] [2022-12-14 13:29:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:29:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:29:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:29:00,912 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:01,243 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 13:29:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:29:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:29:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:01,244 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:29:01,244 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:29:01,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:29:01,245 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:01,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:29:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 13:29:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 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 13:29:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-14 13:29:01,248 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 16 [2022-12-14 13:29:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:01,248 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-14 13:29:01,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-14 13:29:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:29:01,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:01,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 13:29:01,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1695260129, now seen corresponding path program 1 times [2022-12-14 13:29:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542061387] [2022-12-14 13:29:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:01,535 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 13:29:01,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542061387] [2022-12-14 13:29:01,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542061387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:01,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:01,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:29:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009460221] [2022-12-14 13:29:01,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:29:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:29:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:01,537 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 13:29:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:01,573 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-12-14 13:29:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:29:01,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-12-14 13:29:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:01,574 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:29:01,575 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:29:01,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:01,575 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:01,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:29:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:29:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 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 13:29:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 13:29:01,578 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 17 [2022-12-14 13:29:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:01,578 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 13:29:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 13:29:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 13:29:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:29:01,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:01,579 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:29:01,579 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1870852591, now seen corresponding path program 1 times [2022-12-14 13:29:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:01,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109728949] [2022-12-14 13:29:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:01,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:01,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109728949] [2022-12-14 13:29:01,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109728949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:01,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456504955] [2022-12-14 13:29:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:01,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:01,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:29:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 13:29:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:01,973 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:29:01,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:29:01,985 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:29:01,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:29:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:02,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:29:02,046 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:29:02,046 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 11 treesize of output 11 [2022-12-14 13:29:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456504955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390722796] [2022-12-14 13:29:02,388 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:02,388 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:02,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:02,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:02,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:02,406 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 13:29:02,436 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 21 treesize of output 1 [2022-12-14 13:29:02,446 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 13:29:02,456 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 21 treesize of output 1 [2022-12-14 13:29:02,493 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 13:29:02,499 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 21 treesize of output 1 [2022-12-14 13:29:02,504 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 21 treesize of output 1 [2022-12-14 13:29:02,535 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:29:02,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:29:02,542 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 21 treesize of output 1 [2022-12-14 13:29:02,548 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 13:29:02,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:29:02,566 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 21 treesize of output 1 [2022-12-14 13:29:02,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:02,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:02,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:02,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:29:02,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:02,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:29:02,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:02,804 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:29:02,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:29:02,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:02,831 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:29:02,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:29:02,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:02,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:02,881 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:29:02,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:29:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:03,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:03,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:03,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:03,171 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:03,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:03,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:07,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1555#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_18| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_17| Int)) (and (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_17| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_18|)) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_18|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_17|))) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_17|) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_18|) 1))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:29:07,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:07,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:07,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-12-14 13:29:07,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630085266] [2022-12-14 13:29:07,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:07,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:29:07,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:29:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 13:29:07,038 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:07,486 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-12-14 13:29:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:29:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 13:29:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:07,487 INFO L225 Difference]: With dead ends: 58 [2022-12-14 13:29:07,487 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 13:29:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 13:29:07,488 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 243 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:07,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 82 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 13:29:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-12-14 13:29:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 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 13:29:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-14 13:29:07,491 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2022-12-14 13:29:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:07,491 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-14 13:29:07,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-14 13:29:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:29:07,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:07,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:07,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:29:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:07,694 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:07,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2133111821, now seen corresponding path program 1 times [2022-12-14 13:29:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:07,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102881202] [2022-12-14 13:29:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:08,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102881202] [2022-12-14 13:29:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102881202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894814590] [2022-12-14 13:29:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:08,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:08,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:29:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 13:29:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:08,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:08,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 13:29:08,414 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:29:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:29:08,536 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:29:08,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:29:08,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:29:08,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:08,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:08,647 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 27 treesize of output 15 [2022-12-14 13:29:08,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:29:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:08,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894814590] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401309721] [2022-12-14 13:29:09,324 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:09,324 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:09,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:09,324 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:09,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:09,341 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 13:29:09,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:09,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:09,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:09,432 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 13:29:09,440 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 21 treesize of output 1 [2022-12-14 13:29:09,446 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 21 treesize of output 1 [2022-12-14 13:29:09,482 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 21 treesize of output 1 [2022-12-14 13:29:09,490 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 13:29:09,508 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:29:09,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:29:09,519 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 21 treesize of output 1 [2022-12-14 13:29:09,542 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:29:09,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:29:09,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:09,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:09,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:09,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:09,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:29:09,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:29:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:09,762 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:29:09,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:29:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:09,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:09,806 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:29:09,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:29:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:09,837 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:29:09,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:29:09,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:09,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:09,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:10,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:10,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:10,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:10,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:12,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1822#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:12,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:12,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:12,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-14 13:29:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967293666] [2022-12-14 13:29:12,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:12,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:29:12,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:29:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 13:29:12,722 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:29:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:15,145 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-12-14 13:29:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:29:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 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 18 [2022-12-14 13:29:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:15,146 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:29:15,146 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:29:15,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 13:29:15,147 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:15,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 41 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:29:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:29:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-14 13:29:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 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 13:29:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-12-14 13:29:15,150 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2022-12-14 13:29:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:15,150 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-12-14 13:29:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:29:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-12-14 13:29:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:29:15,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:15,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:15,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:29:15,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:29:15,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:29:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1350443651, now seen corresponding path program 1 times [2022-12-14 13:29:15,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:15,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545668753] [2022-12-14 13:29:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:15,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:15,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545668753] [2022-12-14 13:29:15,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545668753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311137872] [2022-12-14 13:29:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:15,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:15,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:29:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 13:29:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:16,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:29:16,368 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 13:29:16,392 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:29:16,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-12-14 13:29:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:16,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:16,516 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 47 treesize of output 31 [2022-12-14 13:29:16,520 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 15 treesize of output 7 [2022-12-14 13:29:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:17,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:18,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311137872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:18,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668266834] [2022-12-14 13:29:18,219 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 13:29:18,219 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:18,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:18,219 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:18,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,239 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 13:29:18,268 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 21 treesize of output 1 [2022-12-14 13:29:18,276 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 13:29:18,285 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 21 treesize of output 1 [2022-12-14 13:29:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-12-14 13:29:18,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:18,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:18,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:18,435 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 30 treesize of output 14 [2022-12-14 13:29:18,452 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 45 treesize of output 29 [2022-12-14 13:29:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:29:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 13:29:18,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:18,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-14 13:29:18,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-12-14 13:29:18,651 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 97 treesize of output 73 [2022-12-14 13:29:18,667 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 134 treesize of output 110 [2022-12-14 13:29:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2022-12-14 13:29:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 13:29:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2022-12-14 13:29:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:29:18,887 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 19 treesize of output 1 [2022-12-14 13:29:18,896 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 19 treesize of output 1 [2022-12-14 13:29:18,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:18,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:24,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2094#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= 0 |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstpncpy_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post9#1.offset|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:24,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:24,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:24,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2022-12-14 13:29:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028311707] [2022-12-14 13:29:24,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:24,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:29:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:29:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2154, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:29:24,007 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 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 13:30:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:00,641 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-12-14 13:30:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:30:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 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 19 [2022-12-14 13:30:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:00,642 INFO L225 Difference]: With dead ends: 58 [2022-12-14 13:30:00,642 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 13:30:00,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=624, Invalid=4346, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 13:30:00,643 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 157 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:00,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 47 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:30:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 13:30:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-12-14 13:30:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-12-14 13:30:00,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 19 [2022-12-14 13:30:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:00,645 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-12-14 13:30:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 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 13:30:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-12-14 13:30:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:30:00,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:00,645 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:00,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:30:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:30:00,847 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -910623010, now seen corresponding path program 2 times [2022-12-14 13:30:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433272208] [2022-12-14 13:30:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:01,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433272208] [2022-12-14 13:30:01,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433272208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145872849] [2022-12-14 13:30:01,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:01,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:01,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:01,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:30:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:30:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:01,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 13:30:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:01,619 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:30:01,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:01,747 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 13:30:01,764 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:30:01,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:01,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:30:01,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:30:01,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:01,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 13:30:01,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:30:01,963 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 17 treesize of output 19 [2022-12-14 13:30:02,050 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 13:30:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:02,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:02,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:30:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:02,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:02,174 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:30:02,222 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_688 (Array Int Int)) (v_ArrVal_687 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_687) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_688) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 1)) 0)) is different from false [2022-12-14 13:30:02,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:02,490 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 26 treesize of output 27 [2022-12-14 13:30:02,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:02,496 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 141 treesize of output 130 [2022-12-14 13:30:02,502 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 118 treesize of output 102 [2022-12-14 13:30:02,505 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 102 treesize of output 94 [2022-12-14 13:30:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 13:30:02,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145872849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725234435] [2022-12-14 13:30:02,744 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:30:02,744 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:02,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:02,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:02,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:02,759 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 13:30:02,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:02,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:02,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:02,830 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 21 treesize of output 1 [2022-12-14 13:30:02,839 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 21 treesize of output 1 [2022-12-14 13:30:02,844 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 13:30:02,869 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 21 treesize of output 1 [2022-12-14 13:30:02,884 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:02,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:30:02,894 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 21 treesize of output 1 [2022-12-14 13:30:02,901 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 13:30:02,928 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:30:02,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:30:02,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:02,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:02,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:03,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:03,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:30:03,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:30:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:03,162 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:03,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:30:03,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:03,199 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:03,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:30:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:03,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:03,237 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:30:03,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:30:03,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:03,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:03,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:03,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:03,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:03,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:03,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:05,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:05,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:05,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:05,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-12-14 13:30:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974769552] [2022-12-14 13:30:05,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:05,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:30:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:05,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:30:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1794, Unknown=21, NotChecked=174, Total=2162 [2022-12-14 13:30:05,792 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:30:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:06,695 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-12-14 13:30:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:30:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 13:30:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:06,696 INFO L225 Difference]: With dead ends: 105 [2022-12-14 13:30:06,696 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 13:30:06,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=350, Invalid=2607, Unknown=21, NotChecked=214, Total=3192 [2022-12-14 13:30:06,696 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:06,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 223 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 497 Invalid, 1 Unknown, 91 Unchecked, 0.4s Time] [2022-12-14 13:30:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 13:30:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2022-12-14 13:30:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-12-14 13:30:06,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 22 [2022-12-14 13:30:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-12-14 13:30:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:30:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-12-14 13:30:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:30:06,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:06,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:06,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:30:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:06,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1787541052, now seen corresponding path program 1 times [2022-12-14 13:30:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042917020] [2022-12-14 13:30:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:30:08,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:08,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042917020] [2022-12-14 13:30:08,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042917020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:08,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365911953] [2022-12-14 13:30:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:08,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:08,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:30:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:08,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 13:30:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:08,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 13:30:08,249 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 13:30:08,307 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:30:08,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:08,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:08,433 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 27 treesize of output 15 [2022-12-14 13:30:08,436 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 15 treesize of output 7 [2022-12-14 13:30:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:30:09,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:30:10,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365911953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683710836] [2022-12-14 13:30:10,221 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 13:30:10,221 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:10,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:10,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:10,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:10,235 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 13:30:10,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:10,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,310 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 21 treesize of output 1 [2022-12-14 13:30:10,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:30:10,323 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 21 treesize of output 1 [2022-12-14 13:30:10,344 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 13:30:10,360 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:30:10,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:30:10,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:30:10,387 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 21 treesize of output 1 [2022-12-14 13:30:10,395 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 21 treesize of output 1 [2022-12-14 13:30:10,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:10,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:10,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:10,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:30:10,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:10,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:30:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:10,624 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:30:10,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:30:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:10,656 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:30:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:10,696 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:10,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:30:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:10,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:10,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:30:10,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:11,019 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:30:11,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:30:11,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:15,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2805#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (= |ULTIMATE.start_cstpncpy_#t~post9#1.offset| (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_cstpncpy_~#dst#1.base|) |ULTIMATE.start_cstpncpy_~#dst#1.offset|) 1)) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_cstpncpy_~#dst#1.base|) |ULTIMATE.start_cstpncpy_~#dst#1.offset|) |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= (+ |ULTIMATE.start_cstpncpy_~#dst#1.offset| 4) (select |#length| |ULTIMATE.start_cstpncpy_~#dst#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post9#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= (select |#valid| |ULTIMATE.start_cstpncpy_~#dst#1.base|) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:15,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:15,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:15,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 37 [2022-12-14 13:30:15,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016024358] [2022-12-14 13:30:15,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:15,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:30:15,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:30:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2787, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 13:30:15,057 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 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 13:30:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:24,282 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-12-14 13:30:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:30:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 13:30:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:24,283 INFO L225 Difference]: With dead ends: 83 [2022-12-14 13:30:24,283 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 13:30:24,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=481, Invalid=5371, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:30:24,285 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 202 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:24,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 69 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:30:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 13:30:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2022-12-14 13:30:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 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 13:30:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-12-14 13:30:24,286 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 23 [2022-12-14 13:30:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:24,286 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-12-14 13:30:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 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 13:30:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-12-14 13:30:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:30:24,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:24,287 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:24,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:30:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:24,489 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1555084896, now seen corresponding path program 3 times [2022-12-14 13:30:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315564034] [2022-12-14 13:30:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:24,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315564034] [2022-12-14 13:30:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315564034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020431586] [2022-12-14 13:30:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:30:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:24,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:24,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:30:24,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:30:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 13:30:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:24,994 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:24,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:30:25,001 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:25,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:30:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:25,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:30:25,062 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:30:25,062 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 11 treesize of output 11 [2022-12-14 13:30:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:25,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:25,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020431586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:25,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330376605] [2022-12-14 13:30:25,451 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:30:25,452 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:25,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:25,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:25,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:25,466 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 13:30:25,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:25,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:25,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:25,544 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 21 treesize of output 1 [2022-12-14 13:30:25,550 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 13:30:25,557 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 21 treesize of output 1 [2022-12-14 13:30:25,593 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:30:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:30:25,602 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 21 treesize of output 1 [2022-12-14 13:30:25,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:30:25,615 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 13:30:25,621 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 21 treesize of output 1 [2022-12-14 13:30:25,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:25,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:25,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:25,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:25,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:30:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:30:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:25,840 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:30:25,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:30:25,875 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:30:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:30:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:25,916 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:25,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:30:26,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:26,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:26,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:26,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:26,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:26,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:26,366 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:28,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3191#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|))' at error location [2022-12-14 13:30:28,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:28,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:28,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-12-14 13:30:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373138968] [2022-12-14 13:30:28,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:28,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 13:30:28,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 13:30:28,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:30:28,548 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:30:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:29,268 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-12-14 13:30:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:30:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 13:30:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:29,269 INFO L225 Difference]: With dead ends: 122 [2022-12-14 13:30:29,269 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 13:30:29,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 13:30:29,270 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 238 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:30:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 13:30:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2022-12-14 13:30:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 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 13:30:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-12-14 13:30:29,272 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 24 [2022-12-14 13:30:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:29,272 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-12-14 13:30:29,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:30:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-12-14 13:30:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:30:29,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:29,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:29,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:30:29,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:29,473 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1461179907, now seen corresponding path program 2 times [2022-12-14 13:30:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836785474] [2022-12-14 13:30:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:30,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836785474] [2022-12-14 13:30:30,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836785474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727957027] [2022-12-14 13:30:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:30,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:30,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:30:30,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:30:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:30,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 13:30:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:30,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:30,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:30:30,525 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:30:30,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:30,585 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:30:30,585 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 11 treesize of output 11 [2022-12-14 13:30:30,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:30:30,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:30,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:30,689 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 27 treesize of output 15 [2022-12-14 13:30:30,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:30:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:31,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:32,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727957027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428286770] [2022-12-14 13:30:32,222 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 13:30:32,222 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:32,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:32,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:32,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,249 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 13:30:32,274 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 13:30:32,281 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 21 treesize of output 1 [2022-12-14 13:30:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-12-14 13:30:32,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2022-12-14 13:30:32,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:32,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,424 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 45 treesize of output 29 [2022-12-14 13:30:32,437 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 30 treesize of output 14 [2022-12-14 13:30:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:32,545 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 13:30:32,545 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 1 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:30:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-12-14 13:30:32,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-14 13:30:32,639 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 141 treesize of output 117 [2022-12-14 13:30:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-12-14 13:30:32,673 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 19 treesize of output 11 [2022-12-14 13:30:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 37 [2022-12-14 13:30:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 74 [2022-12-14 13:30:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 13:30:32,835 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 19 treesize of output 1 [2022-12-14 13:30:32,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:30:32,849 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 19 treesize of output 1 [2022-12-14 13:30:32,871 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:38,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3616#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= 0 |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstpncpy_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post9#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:38,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:38,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:38,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2022-12-14 13:30:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66080242] [2022-12-14 13:30:38,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 13:30:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 13:30:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3254, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 13:30:38,203 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:42,313 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-12-14 13:30:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 13:30:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 13:30:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:42,314 INFO L225 Difference]: With dead ends: 90 [2022-12-14 13:30:42,314 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:30:42,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1087, Invalid=7655, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 13:30:42,315 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 214 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:42,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 135 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:30:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:30:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 13:30:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 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 13:30:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-12-14 13:30:42,317 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 25 [2022-12-14 13:30:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:42,317 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-12-14 13:30:42,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-12-14 13:30:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:30:42,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:42,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:42,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:42,519 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 962991522, now seen corresponding path program 2 times [2022-12-14 13:30:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476880917] [2022-12-14 13:30:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:30:43,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476880917] [2022-12-14 13:30:43,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476880917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:43,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555306332] [2022-12-14 13:30:43,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:43,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:43,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:43,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:30:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:30:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 13:30:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:43,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:30:43,425 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 13:30:43,489 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:43,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:30:43,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:43,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:43,573 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 27 treesize of output 15 [2022-12-14 13:30:43,575 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 15 treesize of output 7 [2022-12-14 13:30:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:30:44,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:30:44,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555306332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587591641] [2022-12-14 13:30:44,980 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:30:44,981 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:44,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:44,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:44,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:45,004 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 13:30:45,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:45,076 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 13:30:45,087 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 21 treesize of output 1 [2022-12-14 13:30:45,094 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 21 treesize of output 1 [2022-12-14 13:30:45,117 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 21 treesize of output 1 [2022-12-14 13:30:45,127 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 13:30:45,147 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:30:45,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:30:45,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:30:45,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:30:45,184 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 21 treesize of output 1 [2022-12-14 13:30:45,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:45,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:45,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:45,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:30:45,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:30:45,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:30:45,403 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:30:45,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:30:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:45,426 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:30:45,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:30:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:45,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:45,459 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:30:45,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:30:45,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:45,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:45,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:30:45,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:48,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4010#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))) (not (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:48,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:48,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:48,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2022-12-14 13:30:48,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144223524] [2022-12-14 13:30:48,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:30:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:30:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2567, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:30:48,263 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 41 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:55,834 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-12-14 13:30:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:30:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 13:30:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:55,835 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:30:55,835 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:30:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=403, Invalid=4427, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:30:55,836 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:55,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 30 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:30:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:30:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-12-14 13:30:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 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 13:30:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 13:30:55,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 25 [2022-12-14 13:30:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:55,837 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 13:30:55,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 13:30:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 13:30:55,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:55,838 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:55,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:56,039 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:30:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1197037837, now seen corresponding path program 4 times [2022-12-14 13:30:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:56,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659809313] [2022-12-14 13:30:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:56,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:56,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659809313] [2022-12-14 13:30:56,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659809313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516112431] [2022-12-14 13:30:56,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:30:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:56,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:56,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:30:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 13:30:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:56,717 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:30:56,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:56,861 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:30:56,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:30:56,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 13:30:56,920 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 13:30:56,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:56,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:30:57,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:30:57,211 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 13:30:57,343 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 13:30:57,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:57,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:57,452 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 18 treesize of output 10 [2022-12-14 13:30:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:57,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:57,569 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1245 (Array Int Int)) (v_ArrVal_1244 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_1244) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1245) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:30:59,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:59,933 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 26 treesize of output 27 [2022-12-14 13:30:59,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:59,941 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 71 treesize of output 70 [2022-12-14 13:30:59,945 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 54 treesize of output 46 [2022-12-14 13:30:59,950 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 24 treesize of output 20 [2022-12-14 13:31:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 13:31:00,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516112431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467452740] [2022-12-14 13:31:00,467 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:31:00,467 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:00,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:00,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:00,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:00,481 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 13:31:00,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:00,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:00,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:00,550 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 21 treesize of output 1 [2022-12-14 13:31:00,556 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 13:31:00,564 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 21 treesize of output 1 [2022-12-14 13:31:00,599 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:00,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:00,609 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 21 treesize of output 1 [2022-12-14 13:31:00,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:00,629 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 21 treesize of output 1 [2022-12-14 13:31:00,636 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 13:31:00,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:00,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:00,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:00,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:00,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:00,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:00,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:00,851 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:00,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:00,884 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:00,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:31:00,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:00,915 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:00,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:31:01,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:01,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:01,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:01,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:01,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:01,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:01,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:03,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4356#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:03,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:03,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-12-14 13:31:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140948793] [2022-12-14 13:31:03,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:31:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:31:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3067, Unknown=28, NotChecked=112, Total=3422 [2022-12-14 13:31:03,495 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 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 13:31:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:04,670 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-12-14 13:31:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:31:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 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 29 [2022-12-14 13:31:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:04,671 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:31:04,671 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:31:04,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=433, Invalid=4799, Unknown=28, NotChecked=142, Total=5402 [2022-12-14 13:31:04,673 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 237 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 622 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-12-14 13:31:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:31:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-14 13:31:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-12-14 13:31:04,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-12-14 13:31:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:04,674 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-12-14 13:31:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 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 13:31:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-12-14 13:31:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:31:04,675 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:04,676 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:04,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:31:04,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:31:04,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:31:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2012121931, now seen corresponding path program 5 times [2022-12-14 13:31:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833775649] [2022-12-14 13:31:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:04,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:05,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833775649] [2022-12-14 13:31:05,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833775649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417634483] [2022-12-14 13:31:05,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:05,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:05,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:05,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:31:05,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:31:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 13:31:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:05,554 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:05,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:31:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:05,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:05,657 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:31:05,657 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 11 treesize of output 11 [2022-12-14 13:31:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:05,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:06,129 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 29 treesize of output 25 [2022-12-14 13:31:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:06,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417634483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085907164] [2022-12-14 13:31:06,327 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:31:06,327 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:06,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:06,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:06,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:06,346 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 13:31:06,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:06,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:06,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:06,424 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 21 treesize of output 1 [2022-12-14 13:31:06,430 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 13:31:06,438 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 21 treesize of output 1 [2022-12-14 13:31:06,460 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 21 treesize of output 1 [2022-12-14 13:31:06,479 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:06,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:06,498 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 21 treesize of output 1 [2022-12-14 13:31:06,510 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 13:31:06,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:06,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:06,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:06,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:06,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:06,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:06,734 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:31:06,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:31:06,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:06,772 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:06,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:31:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:06,823 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:06,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:06,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:06,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:06,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:07,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:07,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:07,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:07,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:09,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4727#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:09,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:09,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:09,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2022-12-14 13:31:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288071448] [2022-12-14 13:31:09,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:09,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:31:09,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:31:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:31:09,810 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 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 13:31:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:10,441 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-12-14 13:31:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:31:10,441 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 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 31 [2022-12-14 13:31:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:10,441 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:31:10,441 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:31:10,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 13:31:10,442 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 427 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:10,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 61 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:31:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:31:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-14 13:31:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 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 13:31:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-12-14 13:31:10,444 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 31 [2022-12-14 13:31:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:10,444 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-12-14 13:31:10,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 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 13:31:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-12-14 13:31:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 13:31:10,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:10,445 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:10,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:31:10,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:10,646 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:31:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash -22880510, now seen corresponding path program 6 times [2022-12-14 13:31:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:10,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181674717] [2022-12-14 13:31:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:11,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181674717] [2022-12-14 13:31:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181674717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411042831] [2022-12-14 13:31:11,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:31:11,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:11,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:11,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:11,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:31:11,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:31:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 13:31:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:12,000 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 13:31:12,230 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 13:31:12,243 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:31:12,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:31:12,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:12,303 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 13:31:12,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:12,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:31:12,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:31:12,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:31:12,600 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 13:31:12,756 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 13:31:12,901 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 13:31:13,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:13,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:31:13,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:31:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:13,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:13,026 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_1516) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:31:13,032 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1516) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:31:13,331 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1516) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:31:13,988 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int)) (v_ArrVal_1513 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_1513) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_1516) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 3)) 0)) is different from false [2022-12-14 13:31:13,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:31:13,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-14 13:31:14,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:31:14,000 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 141 treesize of output 130 [2022-12-14 13:31:14,004 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 118 treesize of output 102 [2022-12-14 13:31:14,008 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 55 treesize of output 47 [2022-12-14 13:31:14,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:31:14,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 53 [2022-12-14 13:31:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-12-14 13:31:14,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411042831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426951712] [2022-12-14 13:31:14,466 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:31:14,466 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:14,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:14,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:14,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:14,487 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 13:31:14,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:14,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:14,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:14,548 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 13:31:14,554 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 21 treesize of output 1 [2022-12-14 13:31:14,560 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 21 treesize of output 1 [2022-12-14 13:31:14,590 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:14,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:14,596 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 21 treesize of output 1 [2022-12-14 13:31:14,603 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 13:31:14,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:14,622 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 21 treesize of output 1 [2022-12-14 13:31:14,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:14,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:14,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:14,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:14,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:14,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:14,811 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:14,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:31:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:14,859 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:14,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:14,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:14,891 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:14,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:31:14,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:14,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:14,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:15,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:15,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:15,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:15,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:17,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5119#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:17,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:17,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:17,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 54 [2022-12-14 13:31:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821461459] [2022-12-14 13:31:17,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:17,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:31:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:31:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3625, Unknown=76, NotChecked=500, Total=4422 [2022-12-14 13:31:17,935 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 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 13:31:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:20,462 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-12-14 13:31:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:31:20,463 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 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 36 [2022-12-14 13:31:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:20,463 INFO L225 Difference]: With dead ends: 77 [2022-12-14 13:31:20,463 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:31:20,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=531, Invalid=6712, Unknown=83, NotChecked=684, Total=8010 [2022-12-14 13:31:20,464 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 24 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:20,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 258 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 844 Invalid, 32 Unknown, 164 Unchecked, 0.7s Time] [2022-12-14 13:31:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:31:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-12-14 13:31:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 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 13:31:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-12-14 13:31:20,466 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 36 [2022-12-14 13:31:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:20,466 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-12-14 13:31:20,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 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 13:31:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-12-14 13:31:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 13:31:20,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:20,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:20,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:31:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:20,668 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:31:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash -757212520, now seen corresponding path program 2 times [2022-12-14 13:31:20,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:20,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252819335] [2022-12-14 13:31:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:31:21,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252819335] [2022-12-14 13:31:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252819335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540574612] [2022-12-14 13:31:21,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:21,623 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:21,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:31:22,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:31:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 145 conjunts are in the unsatisfiable core [2022-12-14 13:31:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:22,372 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:31:22,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:31:22,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:31:22,810 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:31:22,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:22,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 16 [2022-12-14 13:31:22,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:31:22,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:22,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-12-14 13:31:22,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:31:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:24,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:31:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540574612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819937225] [2022-12-14 13:31:27,896 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 13:31:27,896 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:27,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:27,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:27,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:27,912 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 13:31:27,932 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 21 treesize of output 1 [2022-12-14 13:31:27,942 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 13:31:27,951 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 21 treesize of output 1 [2022-12-14 13:31:27,972 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 21 treesize of output 1 [2022-12-14 13:31:27,977 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 21 treesize of output 1 [2022-12-14 13:31:27,982 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 13:31:28,001 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 21 treesize of output 1 [2022-12-14 13:31:28,017 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:28,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:28,025 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 13:31:28,032 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 21 treesize of output 1 [2022-12-14 13:31:28,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:28,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:28,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:28,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:28,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:28,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:28,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:28,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:28,210 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:28,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:28,241 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:28,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:31:28,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:28,273 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:28,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:31:28,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:28,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:28,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:28,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:28,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:28,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:28,552 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:31:28,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:31:28,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:31:28,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:28,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:34,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5605#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (= |ULTIMATE.start_cstpncpy_#t~post9#1.offset| (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_cstpncpy_~#dst#1.base|) |ULTIMATE.start_cstpncpy_~#dst#1.offset|) 1)) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_cstpncpy_~#dst#1.base|) |ULTIMATE.start_cstpncpy_~#dst#1.offset|) |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= (+ |ULTIMATE.start_cstpncpy_~#dst#1.offset| 4) (select |#length| |ULTIMATE.start_cstpncpy_~#dst#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_cstpncpy_~#dst#1.base|) |ULTIMATE.start_cstpncpy_~#dst#1.offset|)) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= (select |#valid| |ULTIMATE.start_cstpncpy_~#dst#1.base|) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1)) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post9#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post9#1.base|))) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post9#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:34,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:34,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:34,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 20] total 62 [2022-12-14 13:31:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284308723] [2022-12-14 13:31:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:34,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:31:34,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:31:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=6038, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 13:31:34,837 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 64 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 63 states have internal predecessors, (107), 0 states have call successors, (0), 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 13:31:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:47,253 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-12-14 13:31:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 13:31:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 63 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 13:31:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:47,253 INFO L225 Difference]: With dead ends: 80 [2022-12-14 13:31:47,253 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:31:47,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4584 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1727, Invalid=15565, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 13:31:47,255 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 491 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:47,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 44 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:31:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:31:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-12-14 13:31:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 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 13:31:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-12-14 13:31:47,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-12-14 13:31:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:47,256 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-12-14 13:31:47,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 63 states have internal predecessors, (107), 0 states have call successors, (0), 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 13:31:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-12-14 13:31:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 13:31:47,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:47,256 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:47,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:31:47,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 13:31:47,458 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:31:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 263867140, now seen corresponding path program 7 times [2022-12-14 13:31:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872636713] [2022-12-14 13:31:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:47,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872636713] [2022-12-14 13:31:47,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872636713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602217879] [2022-12-14 13:31:47,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:31:47,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:47,988 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:47,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:31:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 13:31:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:48,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:48,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:31:48,162 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:48,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:31:48,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:48,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:48,265 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:31:48,266 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 11 treesize of output 11 [2022-12-14 13:31:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602217879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503641213] [2022-12-14 13:31:48,914 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:31:48,914 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:48,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:48,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:48,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:48,933 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 13:31:48,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:48,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:48,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:49,004 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 21 treesize of output 1 [2022-12-14 13:31:49,014 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 21 treesize of output 1 [2022-12-14 13:31:49,020 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 13:31:49,046 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 21 treesize of output 1 [2022-12-14 13:31:49,052 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 13:31:49,071 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:49,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:49,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:49,096 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 21 treesize of output 1 [2022-12-14 13:31:49,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:49,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:49,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:49,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:49,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:49,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:49,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:49,298 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:49,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:31:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:49,335 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:49,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:49,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:49,382 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:31:49,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:31:49,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:49,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:49,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:49,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:49,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:49,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:49,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:52,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6107#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:52,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:52,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:52,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-12-14 13:31:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978226987] [2022-12-14 13:31:52,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 13:31:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 13:31:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:31:52,088 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 40 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:31:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:52,878 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-12-14 13:31:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:31:52,878 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 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 38 [2022-12-14 13:31:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:52,878 INFO L225 Difference]: With dead ends: 48 [2022-12-14 13:31:52,878 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 13:31:52,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=622, Invalid=3800, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 13:31:52,879 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:52,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 62 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:31:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 13:31:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-12-14 13:31:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-12-14 13:31:52,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-12-14 13:31:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:52,880 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-12-14 13:31:52,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:31:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-12-14 13:31:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 13:31:52,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:52,881 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:52,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:31:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 13:31:53,082 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:31:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash -410053250, now seen corresponding path program 3 times [2022-12-14 13:31:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:53,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798907406] [2022-12-14 13:31:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:31:54,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798907406] [2022-12-14 13:31:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798907406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610154975] [2022-12-14 13:31:54,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:31:54,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:54,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:54,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:54,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:31:54,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:31:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:54,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 13:31:54,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:54,469 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-12-14 13:31:54,469 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 13:31:54,490 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:31:54,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:31:54,679 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:54,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:31:54,693 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:31:54,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:31:54,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:54,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:54,808 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 35 treesize of output 19 [2022-12-14 13:31:54,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:31:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:31:55,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:31:56,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610154975] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137312744] [2022-12-14 13:31:56,773 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:31:56,773 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:56,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:56,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:56,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:56,790 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 13:31:56,812 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 21 treesize of output 1 [2022-12-14 13:31:56,820 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 21 treesize of output 1 [2022-12-14 13:31:56,827 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 13:31:56,847 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 21 treesize of output 1 [2022-12-14 13:31:56,852 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 13:31:56,859 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 21 treesize of output 1 [2022-12-14 13:31:56,884 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:56,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:31:56,892 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 13:31:56,913 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:31:56,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:31:56,920 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 21 treesize of output 1 [2022-12-14 13:31:56,927 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 21 treesize of output 1 [2022-12-14 13:31:56,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:56,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:56,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:57,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:31:57,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:31:57,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:31:57,087 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:31:57,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-12-14 13:31:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:57,135 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:31:57,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:31:57,171 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:31:57,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:31:57,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:57,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:57,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:57,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:57,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:31:57,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:31:57,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:01,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6527#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))) (not (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:32:01,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:01,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:01,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 55 [2022-12-14 13:32:01,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27997446] [2022-12-14 13:32:01,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:01,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:32:01,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:32:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=4508, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:32:01,991 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 56 states have internal predecessors, (103), 0 states have call successors, (0), 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 13:32:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:07,467 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-12-14 13:32:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:32:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 56 states have internal predecessors, (103), 0 states have call successors, (0), 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 39 [2022-12-14 13:32:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:07,467 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:32:07,468 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:32:07,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=944, Invalid=8956, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:32:07,468 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 361 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:07,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:32:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:32:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-12-14 13:32:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.109375) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-12-14 13:32:07,470 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 39 [2022-12-14 13:32:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-12-14 13:32:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 56 states have internal predecessors, (103), 0 states have call successors, (0), 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 13:32:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-12-14 13:32:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 13:32:07,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:07,470 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:32:07,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:32:07,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:07,672 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:32:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1224275223, now seen corresponding path program 8 times [2022-12-14 13:32:07,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:32:07,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888204802] [2022-12-14 13:32:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:32:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:32:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:08,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:32:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888204802] [2022-12-14 13:32:08,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888204802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:32:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430886420] [2022-12-14 13:32:08,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:32:08,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:08,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:32:10,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:32:10,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 13:32:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:10,210 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:32:10,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:32:10,444 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 13:32:10,455 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:32:10,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:32:10,503 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 13:32:10,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:32:10,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 13:32:10,630 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 17 treesize of output 19 [2022-12-14 13:32:10,684 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 14 treesize of output 16 [2022-12-14 13:32:10,767 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 14 treesize of output 16 [2022-12-14 13:32:10,848 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 14 treesize of output 16 [2022-12-14 13:32:10,931 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 14 treesize of output 16 [2022-12-14 13:32:10,996 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 15 treesize of output 7 [2022-12-14 13:32:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:10,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:11,007 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:32:15,208 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:32:15,218 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2149 (Array Int Int)) (v_ArrVal_2151 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2149) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:32:15,223 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:32:18,368 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2147 (Array Int Int)) (v_ArrVal_2151 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2147) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:32:18,374 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2147 (Array Int Int)) (v_ArrVal_2151 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2147) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 4)) 0)) is different from false [2022-12-14 13:32:18,382 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2147 (Array Int Int)) (v_ArrVal_2151 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2147) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_2151) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 4)) 0)) is different from false [2022-12-14 13:32:18,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:18,390 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 26 treesize of output 27 [2022-12-14 13:32:18,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:18,397 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 71 treesize of output 66 [2022-12-14 13:32:18,401 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 54 treesize of output 46 [2022-12-14 13:32:18,405 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 24 treesize of output 20 [2022-12-14 13:32:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2022-12-14 13:32:19,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430886420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:19,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481873629] [2022-12-14 13:32:19,016 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:32:19,016 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:32:19,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:32:19,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:32:19,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:32:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:19,034 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 13:32:19,054 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 21 treesize of output 1 [2022-12-14 13:32:19,061 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 21 treesize of output 1 [2022-12-14 13:32:19,069 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 13:32:19,096 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 21 treesize of output 1 [2022-12-14 13:32:19,101 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 21 treesize of output 1 [2022-12-14 13:32:19,106 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 13:32:19,122 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 13:32:19,128 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 21 treesize of output 1 [2022-12-14 13:32:19,134 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 21 treesize of output 1 [2022-12-14 13:32:19,154 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:32:19,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:32:19,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:32:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:19,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:19,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:19,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:19,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:32:19,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:32:19,327 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:32:19,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:32:19,361 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:32:19,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:32:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:19,405 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:32:19,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:32:19,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:19,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:19,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:19,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:19,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:19,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:19,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:24,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7053#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_158| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_157| Int)) (and (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_158|) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_158|) 1) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_157| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_158|)) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_157|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_158|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_157|) 0)))) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 13:32:24,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:24,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:24,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 63 [2022-12-14 13:32:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853869722] [2022-12-14 13:32:24,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:24,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:32:24,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:32:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4550, Unknown=47, NotChecked=994, Total=5852 [2022-12-14 13:32:24,321 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 64 states, 64 states have (on average 1.796875) internal successors, (115), 63 states have internal predecessors, (115), 0 states have call successors, (0), 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 13:32:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:26,704 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-12-14 13:32:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:32:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.796875) internal successors, (115), 63 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 13:32:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:26,704 INFO L225 Difference]: With dead ends: 99 [2022-12-14 13:32:26,705 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 13:32:26,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=533, Invalid=7457, Unknown=48, NotChecked=1274, Total=9312 [2022-12-14 13:32:26,705 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 23 mSolverCounterUnsat, 62 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 62 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:26,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 271 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1157 Invalid, 62 Unknown, 325 Unchecked, 0.9s Time] [2022-12-14 13:32:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 13:32:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-12-14 13:32:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.106060606060606) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 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 13:32:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-12-14 13:32:26,707 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 43 [2022-12-14 13:32:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:26,707 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-12-14 13:32:26,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.796875) internal successors, (115), 63 states have internal predecessors, (115), 0 states have call successors, (0), 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 13:32:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-12-14 13:32:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 13:32:26,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:26,707 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:32:26,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:32:26,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:26,909 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:32:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:26,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1556117671, now seen corresponding path program 9 times [2022-12-14 13:32:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:32:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066677782] [2022-12-14 13:32:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:32:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:32:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:27,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:32:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066677782] [2022-12-14 13:32:27,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066677782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:32:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985450795] [2022-12-14 13:32:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:32:27,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:27,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:27,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:32:28,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:32:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 13:32:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:28,209 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:28,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:32:28,218 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:32:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:28,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:32:28,334 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:32:28,334 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 11 treesize of output 11 [2022-12-14 13:32:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:29,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985450795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:29,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238273989] [2022-12-14 13:32:29,043 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:32:29,043 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:32:29,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:32:29,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:32:29,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:32:29,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:29,057 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 13:32:29,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:32:29,093 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 21 treesize of output 1 [2022-12-14 13:32:29,099 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 21 treesize of output 1 [2022-12-14 13:32:29,126 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 21 treesize of output 1 [2022-12-14 13:32:29,131 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 21 treesize of output 1 [2022-12-14 13:32:29,135 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 13:32:29,151 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 21 treesize of output 1 [2022-12-14 13:32:29,163 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:29,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:32:29,172 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2022-12-14 13:32:29,186 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:32:29,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:32:29,194 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 13:32:29,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:29,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:29,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:29,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:32:29,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:32:29,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:29,359 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:32:29,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-12-14 13:32:29,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:29,417 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:32:29,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:32:29,456 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:32:29,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:32:29,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:29,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:29,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:29,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:29,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:29,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:33,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7583#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_173| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_172| Int)) (and (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_172|) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_172| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_173|)) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_173|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_173|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_172|) 0)))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:32:33,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:33,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:33,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 43 [2022-12-14 13:32:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431702048] [2022-12-14 13:32:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:33,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:32:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:32:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3020, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 13:32:33,905 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 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 13:32:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:34,646 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-12-14 13:32:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:32:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 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 45 [2022-12-14 13:32:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:34,647 INFO L225 Difference]: With dead ends: 68 [2022-12-14 13:32:34,647 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 13:32:34,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=837, Invalid=4713, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 13:32:34,648 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 349 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:34,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 57 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:32:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 13:32:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 13:32:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 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 13:32:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-12-14 13:32:34,650 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 45 [2022-12-14 13:32:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:34,650 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-12-14 13:32:34,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 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 13:32:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-12-14 13:32:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 13:32:34,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:34,651 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:32:34,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:32:34,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 13:32:34,853 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:32:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2113596198, now seen corresponding path program 10 times [2022-12-14 13:32:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:32:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268047809] [2022-12-14 13:32:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:32:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:32:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:36,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:32:36,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268047809] [2022-12-14 13:32:36,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268047809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:32:36,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880984184] [2022-12-14 13:32:36,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:32:36,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:36,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:36,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:32:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 13:32:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:36,363 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 13:32:36,631 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:32:36,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:32:36,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 13:32:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:36,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:32:36,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:32:36,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:32:36,943 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 13:32:37,008 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 13:32:37,068 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 13:32:37,134 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 13:32:37,149 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 14 treesize of output 16 [2022-12-14 13:32:37,156 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 15 treesize of output 7 [2022-12-14 13:32:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:37,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:41,194 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2520 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2520) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:32:41,203 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2520 (Array Int Int)) (v_ArrVal_2518 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2518) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2520) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:32:41,325 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2516 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2516) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:32:41,789 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2516 (Array Int Int)) (v_ArrVal_2515 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2515) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_2516) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ 5 |c_ULTIMATE.start_cstpncpy_#in~src#1.offset|)) 0)) is different from false [2022-12-14 13:32:41,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:41,797 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 26 treesize of output 27 [2022-12-14 13:32:41,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:41,804 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 71 treesize of output 66 [2022-12-14 13:32:41,808 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 54 treesize of output 46 [2022-12-14 13:32:41,811 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 24 treesize of output 20 [2022-12-14 13:32:42,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:42,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 53 [2022-12-14 13:32:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 32 not checked. [2022-12-14 13:32:42,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880984184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:42,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307113038] [2022-12-14 13:32:42,523 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:32:42,524 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:32:42,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:32:42,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:32:42,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:32:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:42,538 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 13:32:42,567 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 13:32:42,582 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 21 treesize of output 1 [2022-12-14 13:32:42,590 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 21 treesize of output 1 [2022-12-14 13:32:42,614 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 13:32:42,620 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 21 treesize of output 1 [2022-12-14 13:32:42,626 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 21 treesize of output 1 [2022-12-14 13:32:42,658 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:42,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:32:42,675 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:32:42,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:32:42,682 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 13:32:42,687 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 21 treesize of output 1 [2022-12-14 13:32:42,694 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 21 treesize of output 1 [2022-12-14 13:32:42,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:42,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:42,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:42,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:32:42,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:42,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:32:42,857 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:32:42,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:32:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:42,903 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:32:42,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:32:42,932 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:32:42,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:32:43,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:43,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:43,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:43,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:43,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:43,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:48,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8124#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_190| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_189| Int)) (and (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_189|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_190|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_189|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_190|) 1) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_190|) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_189| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_190|)))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 13:32:48,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:48,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:48,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 63 [2022-12-14 13:32:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265400017] [2022-12-14 13:32:48,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:48,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:32:48,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:32:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4936, Unknown=81, NotChecked=580, Total=5852 [2022-12-14 13:32:48,437 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 64 states, 64 states have (on average 1.8125) internal successors, (116), 63 states have internal predecessors, (116), 0 states have call successors, (0), 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 13:32:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:51,179 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-12-14 13:32:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 13:32:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.8125) internal successors, (116), 63 states have internal predecessors, (116), 0 states have call successors, (0), 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 50 [2022-12-14 13:32:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:51,180 INFO L225 Difference]: With dead ends: 106 [2022-12-14 13:32:51,180 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:32:51,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=593, Invalid=9438, Unknown=85, NotChecked=804, Total=10920 [2022-12-14 13:32:51,181 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 185 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:51,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 317 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1511 Invalid, 0 Unknown, 210 Unchecked, 0.9s Time] [2022-12-14 13:32:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:32:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-12-14 13:32:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.088235294117647) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-12-14 13:32:51,183 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 50 [2022-12-14 13:32:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:51,183 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-12-14 13:32:51,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.8125) internal successors, (116), 63 states have internal predecessors, (116), 0 states have call successors, (0), 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 13:32:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-12-14 13:32:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 13:32:51,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:51,184 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:32:51,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 13:32:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:51,385 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:32:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1621349464, now seen corresponding path program 11 times [2022-12-14 13:32:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:32:51,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963397682] [2022-12-14 13:32:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:32:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:32:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:52,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:32:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963397682] [2022-12-14 13:32:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963397682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:32:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155606632] [2022-12-14 13:32:52,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:32:52,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:52,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:52,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:32:54,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:32:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 13:32:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:54,758 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:54,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:32:54,769 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:32:54,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:32:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:54,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:32:54,933 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:32:54,934 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 11 treesize of output 11 [2022-12-14 13:32:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:55,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:56,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155606632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729060660] [2022-12-14 13:32:56,063 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:32:56,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:32:56,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:32:56,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:32:56,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:32:56,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:56,077 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 13:32:56,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:56,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,152 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 21 treesize of output 1 [2022-12-14 13:32:56,161 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 21 treesize of output 1 [2022-12-14 13:32:56,168 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 13:32:56,207 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:32:56,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:32:56,216 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 21 treesize of output 1 [2022-12-14 13:32:56,223 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 13:32:56,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:32:56,248 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 21 treesize of output 1 [2022-12-14 13:32:56,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:56,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:56,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:56,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:32:56,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:32:56,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:32:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:56,477 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:32:56,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:32:56,528 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:32:56,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-12-14 13:32:56,561 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:32:56,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:32:56,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:56,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:32:56,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:56,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:59,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8733#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|))' at error location [2022-12-14 13:32:59,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:59,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2022-12-14 13:32:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150202130] [2022-12-14 13:32:59,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:59,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:32:59,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:32:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4242, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:32:59,479 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 57 states, 56 states have (on average 2.7857142857142856) internal successors, (156), 56 states have internal predecessors, (156), 0 states have call successors, (0), 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 13:33:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:00,354 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-12-14 13:33:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:33:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.7857142857142856) internal successors, (156), 56 states have internal predecessors, (156), 0 states have call successors, (0), 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 52 [2022-12-14 13:33:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:00,355 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:33:00,355 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 13:33:00,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1202, Invalid=6454, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:33:00,355 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 490 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:00,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 86 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:33:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 13:33:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-14 13:33:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 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 13:33:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-12-14 13:33:00,357 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 52 [2022-12-14 13:33:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:00,357 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-12-14 13:33:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.7857142857142856) internal successors, (156), 56 states have internal predecessors, (156), 0 states have call successors, (0), 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 13:33:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-12-14 13:33:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 13:33:00,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:00,357 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:00,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 13:33:00,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 13:33:00,559 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:33:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 426504389, now seen corresponding path program 12 times [2022-12-14 13:33:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003824076] [2022-12-14 13:33:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:02,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003824076] [2022-12-14 13:33:02,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003824076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:33:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953183652] [2022-12-14 13:33:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:33:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:02,141 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:02,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:33:02,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:33:02,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 182 conjunts are in the unsatisfiable core [2022-12-14 13:33:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:02,682 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:33:02,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:33:03,099 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:33:03,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:33:03,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 13:33:03,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:03,184 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 13:33:03,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:33:03,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 13:33:03,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:33:03,373 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 17 treesize of output 19 [2022-12-14 13:33:03,492 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 13:33:03,662 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 13:33:03,793 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 13:33:03,929 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 13:33:04,117 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 13:33:04,269 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 13:33:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:04,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:04,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:33:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:04,395 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:33:04,402 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:33:04,409 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2941 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2941) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:33:04,416 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:33:06,544 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:33:06,551 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2939 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2939) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:33:06,645 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2938 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2938) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:33:06,730 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2937 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2937) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) is different from false [2022-12-14 13:33:06,815 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2936) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 6)) 0)) is different from false [2022-12-14 13:33:06,823 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2936) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 6)) 0)) is different from false [2022-12-14 13:33:06,829 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int)) (v_ArrVal_2936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2936) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_2942) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 6)) 0)) is different from false [2022-12-14 13:33:06,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:06,835 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 26 treesize of output 27 [2022-12-14 13:33:06,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:06,840 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 141 treesize of output 130 [2022-12-14 13:33:06,851 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 59 treesize of output 51 [2022-12-14 13:33:06,855 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 110 treesize of output 94 [2022-12-14 13:33:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 82 not checked. [2022-12-14 13:33:07,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953183652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807529988] [2022-12-14 13:33:07,690 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:33:07,690 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:07,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:07,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:07,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:07,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:07,704 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 13:33:07,728 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 21 treesize of output 1 [2022-12-14 13:33:07,738 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 13:33:07,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2022-12-14 13:33:07,768 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 21 treesize of output 1 [2022-12-14 13:33:07,772 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 13:33:07,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2022-12-14 13:33:07,798 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 13:33:07,815 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:33:07,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:33:07,822 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 21 treesize of output 1 [2022-12-14 13:33:07,830 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 21 treesize of output 1 [2022-12-14 13:33:07,850 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:33:07,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:33:07,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:07,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:07,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:07,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:33:07,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:07,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:33:07,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:08,010 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:08,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:33:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:08,043 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:08,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:33:08,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:08,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:08,092 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:33:08,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:33:08,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:08,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:08,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:08,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:08,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:08,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:08,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:13,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9344#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_225| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_226| Int)) (and (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_225| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_226|)) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_225|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_226|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_225|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_226|) 1))) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:13,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:13,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:13,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 84 [2022-12-14 13:33:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58056664] [2022-12-14 13:33:13,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 13:33:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 13:33:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=7146, Unknown=51, NotChecked=1980, Total=9506 [2022-12-14 13:33:13,478 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 84 states have internal predecessors, (157), 0 states have call successors, (0), 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 13:33:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:17,425 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-12-14 13:33:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 13:33:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 84 states have internal predecessors, (157), 0 states have call successors, (0), 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 57 [2022-12-14 13:33:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:17,426 INFO L225 Difference]: With dead ends: 113 [2022-12-14 13:33:17,426 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 13:33:17,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 11 IntricatePredicates, 3 DeprecatedPredicates, 3792 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=573, Invalid=11628, Unknown=53, NotChecked=2508, Total=14762 [2022-12-14 13:33:17,427 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 25 mSolverCounterUnsat, 92 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 92 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:17,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 377 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1548 Invalid, 92 Unknown, 506 Unchecked, 1.8s Time] [2022-12-14 13:33:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 13:33:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-12-14 13:33:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-12-14 13:33:17,428 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 57 [2022-12-14 13:33:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:17,429 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-12-14 13:33:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 84 states have internal predecessors, (157), 0 states have call successors, (0), 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 13:33:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-12-14 13:33:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 13:33:17,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:17,429 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:17,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:33:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:17,631 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:33:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -461669885, now seen corresponding path program 13 times [2022-12-14 13:33:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319442856] [2022-12-14 13:33:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:18,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319442856] [2022-12-14 13:33:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319442856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:33:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196050261] [2022-12-14 13:33:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:33:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:18,403 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:18,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:33:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 13:33:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:18,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:33:18,753 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:33:18,753 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 11 treesize of output 11 [2022-12-14 13:33:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:18,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:19,262 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 27 treesize of output 23 [2022-12-14 13:33:19,625 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:33:19,626 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 13 treesize of output 12 [2022-12-14 13:33:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196050261] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949521668] [2022-12-14 13:33:19,639 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:33:19,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:19,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:19,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:19,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,653 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 13:33:19,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:19,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:19,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:19,717 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 21 treesize of output 1 [2022-12-14 13:33:19,722 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 13:33:19,731 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 21 treesize of output 1 [2022-12-14 13:33:19,763 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:33:19,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:33:19,770 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 21 treesize of output 1 [2022-12-14 13:33:19,788 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:33:19,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:33:19,803 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 21 treesize of output 1 [2022-12-14 13:33:19,809 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 13:33:19,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:19,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:19,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:19,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:19,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:33:19,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:33:19,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,020 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:33:20,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:33:20,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,054 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:20,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:33:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,082 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:20,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:33:20,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:20,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:20,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:23,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9995#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:23,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:23,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:23,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-12-14 13:33:23,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960581951] [2022-12-14 13:33:23,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:23,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 13:33:23,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 13:33:23,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 13:33:23,305 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 54 states, 53 states have (on average 2.6792452830188678) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 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 13:33:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:24,547 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-12-14 13:33:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:33:24,547 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.6792452830188678) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 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 59 [2022-12-14 13:33:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:24,547 INFO L225 Difference]: With dead ends: 72 [2022-12-14 13:33:24,547 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 13:33:24,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1144, Invalid=6166, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 13:33:24,548 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 639 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:24,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 111 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:33:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 13:33:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-14 13:33:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-12-14 13:33:24,549 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 59 [2022-12-14 13:33:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:24,549 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-12-14 13:33:24,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.6792452830188678) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 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 13:33:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-12-14 13:33:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 13:33:24,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:24,550 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:24,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:33:24,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 13:33:24,752 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:33:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -453614774, now seen corresponding path program 14 times [2022-12-14 13:33:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822390244] [2022-12-14 13:33:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:26,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822390244] [2022-12-14 13:33:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822390244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:33:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524351109] [2022-12-14 13:33:26,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:33:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:26,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:26,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:33:38,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 13:33:38,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 201 conjunts are in the unsatisfiable core [2022-12-14 13:33:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:38,121 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:33:38,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:33:38,561 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 13:33:38,576 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:33:38,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:33:38,651 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 13:33:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:33:38,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:38,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 13:33:38,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:33:38,848 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 17 treesize of output 19 [2022-12-14 13:33:39,018 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 13:33:39,213 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 13:33:39,366 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 13:33:39,536 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 13:33:39,720 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 13:33:39,897 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 13:33:40,071 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 13:33:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:40,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:40,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:33:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:40,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:40,211 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3409 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3409) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:33:40,216 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3409 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3409) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:33:40,223 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3409 (Array Int Int)) (v_ArrVal_3408 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3408) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3409) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:33:40,230 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3409 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3409) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:33:42,572 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3404 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3404) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:33:47,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:47,576 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 26 treesize of output 27 [2022-12-14 13:33:47,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:47,583 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 141 treesize of output 130 [2022-12-14 13:33:47,589 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 59 treesize of output 51 [2022-12-14 13:33:47,593 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 110 treesize of output 94 [2022-12-14 13:33:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 73 not checked. [2022-12-14 13:33:48,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524351109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:48,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979208674] [2022-12-14 13:33:48,681 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:33:48,681 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:48,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:48,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:48,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:48,696 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 13:33:48,719 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 21 treesize of output 1 [2022-12-14 13:33:48,727 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 21 treesize of output 1 [2022-12-14 13:33:48,737 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 13:33:48,761 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 13:33:48,768 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 21 treesize of output 1 [2022-12-14 13:33:48,772 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 21 treesize of output 1 [2022-12-14 13:33:48,790 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 21 treesize of output 1 [2022-12-14 13:33:48,795 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 13:33:48,801 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 21 treesize of output 1 [2022-12-14 13:33:48,819 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:33:48,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:33:48,840 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:33:48,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:33:48,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:48,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:48,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:48,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:33:48,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:33:48,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:33:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:49,004 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:49,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:33:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:49,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:49,045 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:33:49,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:33:49,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:49,074 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:33:49,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:33:49,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:49,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:49,172 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:49,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:49,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:49,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:49,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:54,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10658#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_266| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_265| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_266|) 1) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_266|) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_265| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_266|)) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_266|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_265|))) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_265|))) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:33:54,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:54,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:54,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 88 [2022-12-14 13:33:54,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591557783] [2022-12-14 13:33:54,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-14 13:33:54,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-14 13:33:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=8881, Unknown=106, NotChecked=970, Total=10302 [2022-12-14 13:33:54,981 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 89 states, 89 states have (on average 1.8876404494382022) internal successors, (168), 88 states have internal predecessors, (168), 0 states have call successors, (0), 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 13:33:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:58,816 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-12-14 13:33:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:33:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8876404494382022) internal successors, (168), 88 states have internal predecessors, (168), 0 states have call successors, (0), 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 64 [2022-12-14 13:33:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:58,816 INFO L225 Difference]: With dead ends: 120 [2022-12-14 13:33:58,817 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 13:33:58,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=764, Invalid=15404, Unknown=108, NotChecked=1280, Total=17556 [2022-12-14 13:33:58,817 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 36 mSolverCounterUnsat, 54 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 54 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:58,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 462 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2337 Invalid, 54 Unknown, 304 Unchecked, 1.4s Time] [2022-12-14 13:33:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 13:33:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 13:33:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-12-14 13:33:58,819 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 64 [2022-12-14 13:33:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:58,819 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-12-14 13:33:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8876404494382022) internal successors, (168), 88 states have internal predecessors, (168), 0 states have call successors, (0), 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 13:33:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-12-14 13:33:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 13:33:58,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:58,819 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:58,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 13:33:59,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:59,021 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:33:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 76781644, now seen corresponding path program 15 times [2022-12-14 13:33:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:59,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108917842] [2022-12-14 13:33:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:00,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108917842] [2022-12-14 13:34:00,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108917842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351550930] [2022-12-14 13:34:00,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:34:00,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:00,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:00,103 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:00,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 13:34:01,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:34:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:34:01,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 13:34:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:34:01,321 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:34:01,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:34:01,329 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:34:01,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:34:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:01,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:34:01,598 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:34:01,598 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 11 treesize of output 11 [2022-12-14 13:34:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:01,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:34:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351550930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447939351] [2022-12-14 13:34:15,717 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:34:15,717 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:34:15,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:34:15,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:34:15,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:34:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,732 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 13:34:15,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:15,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:15,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:15,803 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 21 treesize of output 1 [2022-12-14 13:34:15,810 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 21 treesize of output 1 [2022-12-14 13:34:15,816 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 13:34:15,840 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 13:34:15,849 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 21 treesize of output 1 [2022-12-14 13:34:15,873 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:34:15,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:34:15,881 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 21 treesize of output 1 [2022-12-14 13:34:15,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:34:15,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:15,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:15,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:34:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:34:16,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:34:16,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:34:16,099 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:34:16,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:34:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,124 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:34:16,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:34:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,161 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:34:16,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:34:16,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:16,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:16,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:16,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:16,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:16,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:16,461 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:19,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11376#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:19,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:19,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:19,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 56 [2022-12-14 13:34:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938544443] [2022-12-14 13:34:19,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 13:34:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 13:34:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=4381, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:34:19,425 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 57 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:34:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:20,725 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-12-14 13:34:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 13:34:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 57 states have internal predecessors, (160), 0 states have call successors, (0), 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 66 [2022-12-14 13:34:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:20,726 INFO L225 Difference]: With dead ends: 75 [2022-12-14 13:34:20,726 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 13:34:20,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1433, Invalid=7123, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 13:34:20,727 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 472 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:20,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 130 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:34:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 13:34:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 13:34:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-12-14 13:34:20,728 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 66 [2022-12-14 13:34:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:20,728 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-12-14 13:34:20,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 57 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:34:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-12-14 13:34:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:34:20,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:34:20,729 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:34:20,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 13:34:20,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:20,930 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:34:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:34:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1043150175, now seen corresponding path program 16 times [2022-12-14 13:34:20,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:34:20,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21735182] [2022-12-14 13:34:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:34:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:34:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:23,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21735182] [2022-12-14 13:34:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21735182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841634675] [2022-12-14 13:34:23,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:34:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:23,566 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:23,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 13:34:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 166 conjunts are in the unsatisfiable core [2022-12-14 13:34:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:34:23,825 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 13:34:24,253 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 13:34:24,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:34:24,362 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:34:24,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-12-14 13:34:24,367 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 8 treesize of output 3 [2022-12-14 13:34:24,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:24,527 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 16 treesize of output 8 [2022-12-14 13:34:24,678 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:34:24,678 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 1 case distinctions, treesize of input 38 treesize of output 44 [2022-12-14 13:34:24,717 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:34:25,181 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 47 treesize of output 49 [2022-12-14 13:34:25,544 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 47 treesize of output 49 [2022-12-14 13:34:25,874 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 47 treesize of output 49 [2022-12-14 13:34:26,229 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 47 treesize of output 49 [2022-12-14 13:34:26,569 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 47 treesize of output 49 [2022-12-14 13:34:26,887 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 47 treesize of output 49 [2022-12-14 13:34:27,233 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:34:27,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 46 treesize of output 44 [2022-12-14 13:34:27,357 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 13:34:27,618 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 13:34:27,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:27,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:27,857 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 18 treesize of output 10 [2022-12-14 13:34:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:27,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:34:34,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:34,772 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 26 treesize of output 27 [2022-12-14 13:34:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:34,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:34,780 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 37 treesize of output 36 [2022-12-14 13:34:34,787 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 24 treesize of output 22 [2022-12-14 13:34:34,792 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 11 treesize of output 7 [2022-12-14 13:34:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:35,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841634675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:35,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032307860] [2022-12-14 13:34:35,969 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:34:35,969 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:34:35,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:34:35,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:34:35,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:34:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:35,985 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 13:34:36,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:36,056 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 13:34:36,066 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 21 treesize of output 1 [2022-12-14 13:34:36,072 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 21 treesize of output 1 [2022-12-14 13:34:36,102 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:34:36,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:34:36,123 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:34:36,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:34:36,131 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 21 treesize of output 1 [2022-12-14 13:34:36,138 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 21 treesize of output 1 [2022-12-14 13:34:36,143 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 13:34:36,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:34:36,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:36,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:36,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:34:36,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:34:36,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:34:36,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,338 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:34:36,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:34:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,364 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:34:36,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:34:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,403 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:34:36,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:34:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:36,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:36,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:36,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:43,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12112#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:43,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:43,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:43,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36, 36] total 108 [2022-12-14 13:34:43,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74496288] [2022-12-14 13:34:43,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:43,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-12-14 13:34:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-12-14 13:34:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=14037, Unknown=45, NotChecked=0, Total=14520 [2022-12-14 13:34:43,045 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 109 states, 109 states have (on average 1.8256880733944953) internal successors, (199), 108 states have internal predecessors, (199), 0 states have call successors, (0), 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 13:34:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:50,793 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2022-12-14 13:34:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 13:34:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.8256880733944953) internal successors, (199), 108 states have internal predecessors, (199), 0 states have call successors, (0), 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 71 [2022-12-14 13:34:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:50,793 INFO L225 Difference]: With dead ends: 127 [2022-12-14 13:34:50,793 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:34:50,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 124 SyntacticMatches, 10 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6053 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=882, Invalid=22329, Unknown=45, NotChecked=0, Total=23256 [2022-12-14 13:34:50,794 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 3552 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 618 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3552 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 13:34:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:34:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-12-14 13:34:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-12-14 13:34:50,796 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-12-14 13:34:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:50,796 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-12-14 13:34:50,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.8256880733944953) internal successors, (199), 108 states have internal predecessors, (199), 0 states have call successors, (0), 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 13:34:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-12-14 13:34:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 13:34:50,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:34:50,796 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:34:50,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 13:34:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 13:34:50,998 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:34:50,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:34:50,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1247654049, now seen corresponding path program 17 times [2022-12-14 13:34:50,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:34:50,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825812253] [2022-12-14 13:34:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:34:51,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:34:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:51,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825812253] [2022-12-14 13:34:51,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825812253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993369369] [2022-12-14 13:34:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:34:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:51,970 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:51,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 13:35:00,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 13:35:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:35:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 13:35:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:00,535 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:35:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:35:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:00,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:35:00,796 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:35:00,796 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 11 treesize of output 11 [2022-12-14 13:35:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:01,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:01,887 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 29 treesize of output 25 [2022-12-14 13:35:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:02,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993369369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335446500] [2022-12-14 13:35:02,443 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:35:02,443 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:02,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:02,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:02,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:02,456 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 13:35:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:02,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:02,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:02,526 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 21 treesize of output 1 [2022-12-14 13:35:02,531 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 21 treesize of output 1 [2022-12-14 13:35:02,536 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 13:35:02,568 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:35:02,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:35:02,577 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 21 treesize of output 1 [2022-12-14 13:35:02,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:35:02,610 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:35:02,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:35:02,618 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 21 treesize of output 1 [2022-12-14 13:35:02,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:02,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:02,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:02,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:02,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:35:02,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:35:02,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:02,851 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:35:02,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:35:02,892 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:35:02,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-12-14 13:35:02,922 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:35:02,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:35:03,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:03,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:03,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:03,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:03,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:03,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:03,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:06,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12898#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|))' at error location [2022-12-14 13:35:06,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:06,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:06,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 73 [2022-12-14 13:35:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781293950] [2022-12-14 13:35:06,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:06,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-14 13:35:06,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-14 13:35:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=6726, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 13:35:06,254 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 75 states, 74 states have (on average 2.9594594594594597) internal successors, (219), 74 states have internal predecessors, (219), 0 states have call successors, (0), 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 13:35:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:07,632 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2022-12-14 13:35:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 13:35:07,632 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.9594594594594597) internal successors, (219), 74 states have internal predecessors, (219), 0 states have call successors, (0), 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 73 [2022-12-14 13:35:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:07,633 INFO L225 Difference]: With dead ends: 83 [2022-12-14 13:35:07,633 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 13:35:07,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2054, Invalid=10378, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 13:35:07,634 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1044 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:07,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 129 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:35:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 13:35:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-12-14 13:35:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-12-14 13:35:07,635 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2022-12-14 13:35:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:07,635 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-12-14 13:35:07,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.9594594594594597) internal successors, (219), 74 states have internal predecessors, (219), 0 states have call successors, (0), 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 13:35:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-12-14 13:35:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:35:07,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:07,636 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:07,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 13:35:07,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 13:35:07,837 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:35:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:07,838 INFO L85 PathProgramCache]: Analyzing trace with hash -22569853, now seen corresponding path program 4 times [2022-12-14 13:35:07,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:07,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850760908] [2022-12-14 13:35:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:07,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 107 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 13:35:11,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850760908] [2022-12-14 13:35:11,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850760908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267582435] [2022-12-14 13:35:11,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:35:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:11,279 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 13:35:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 153 conjunts are in the unsatisfiable core [2022-12-14 13:35:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:14,776 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-12-14 13:35:14,776 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 13:35:14,789 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:35:14,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:35:14,982 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:35:14,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:35:14,996 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 13:35:14,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:35:15,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-12-14 13:35:15,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-12-14 13:35:15,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:35:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 13:35:17,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 13:35:20,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267582435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:20,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1823491466] [2022-12-14 13:35:20,417 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:35:20,417 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:20,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:20,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:20,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:20,440 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 13:35:20,460 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 21 treesize of output 1 [2022-12-14 13:35:20,471 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 13:35:20,480 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 21 treesize of output 1 [2022-12-14 13:35:20,507 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 21 treesize of output 1 [2022-12-14 13:35:20,514 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 21 treesize of output 1 [2022-12-14 13:35:20,521 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 13:35:20,540 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 21 treesize of output 1 [2022-12-14 13:35:20,546 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 13:35:20,565 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:35:20,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:35:20,575 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 21 treesize of output 1 [2022-12-14 13:35:20,601 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:35:20,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:35:20,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:20,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:20,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:20,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:35:20,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:35:20,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:20,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:20,809 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:35:20,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:35:20,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:20,840 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:35:20,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:35:20,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:20,872 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:35:20,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:35:20,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:20,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:20,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:21,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:21,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:21,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:21,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:26,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13652#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:26,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:26,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:26,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 26] total 89 [2022-12-14 13:35:26,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420626940] [2022-12-14 13:35:26,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:26,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 13:35:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 13:35:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=10041, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 13:35:26,401 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 91 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 90 states have internal predecessors, (174), 0 states have call successors, (0), 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 13:35:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:37,864 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-12-14 13:35:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 13:35:37,865 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 90 states have internal predecessors, (174), 0 states have call successors, (0), 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 74 [2022-12-14 13:35:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:37,866 INFO L225 Difference]: With dead ends: 82 [2022-12-14 13:35:37,866 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 13:35:37,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5917 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1813, Invalid=18209, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 13:35:37,867 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 314 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:37,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 38 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:35:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 13:35:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-12-14 13:35:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 13:35:37,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-12-14 13:35:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:37,868 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 13:35:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 90 states have internal predecessors, (174), 0 states have call successors, (0), 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 13:35:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 13:35:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 13:35:37,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:37,869 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:37,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 13:35:38,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:38,070 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:35:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash -255162514, now seen corresponding path program 18 times [2022-12-14 13:35:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:38,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433760866] [2022-12-14 13:35:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:38,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:40,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:40,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433760866] [2022-12-14 13:35:40,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433760866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:40,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956542760] [2022-12-14 13:35:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:35:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:40,519 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:40,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:35:42,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:35:42,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:35:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 182 conjunts are in the unsatisfiable core [2022-12-14 13:35:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:42,176 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:35:42,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:35:42,681 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 13:35:42,688 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:35:42,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:35:42,751 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 13:35:42,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:42,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:35:42,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:35:43,055 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 13:35:43,175 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 13:35:43,248 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 13:35:43,328 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 13:35:43,407 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 13:35:43,487 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 13:35:43,571 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 13:35:43,651 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 13:35:43,669 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 14 treesize of output 16 [2022-12-14 13:35:43,676 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 15 treesize of output 7 [2022-12-14 13:35:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:43,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:43,690 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4768 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4768) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:35:48,180 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4766 (Array Int Int)) (v_ArrVal_4768 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4766) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4768) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:35:48,339 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4764 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4764) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:35:48,611 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 6)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:35:48,673 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:35:48,831 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4759) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 9)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:35:48,841 WARN L837 $PredicateComparison]: unable to prove that (and (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) |c_ULTIMATE.start_cstpncpy_~src#1.base|)) (forall ((v_ArrVal_4759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4759) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstpncpy_~src#1.offset|)) 0))) is different from false [2022-12-14 13:35:48,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:35:48,993 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 28 treesize of output 29 [2022-12-14 13:35:48,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:35:48,999 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 43 treesize of output 38 [2022-12-14 13:35:49,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 13:35:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 70 not checked. [2022-12-14 13:35:50,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956542760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:50,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243967455] [2022-12-14 13:35:50,485 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:35:50,485 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:50,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:50,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:50,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:50,500 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 13:35:50,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:50,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:50,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:50,573 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 21 treesize of output 1 [2022-12-14 13:35:50,583 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 13:35:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2022-12-14 13:35:50,632 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:35:50,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:35:50,645 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 21 treesize of output 1 [2022-12-14 13:35:50,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:35:50,660 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 13:35:50,668 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 21 treesize of output 1 [2022-12-14 13:35:50,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:50,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:50,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:50,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:35:50,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:35:50,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:35:50,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,913 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:35:50,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:35:50,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,955 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:35:50,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:35:50,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,996 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:35:50,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:35:51,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:51,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:51,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:51,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:35:51,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:51,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:35:51,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:54,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14460#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:54,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:54,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:54,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 37, 37] total 95 [2022-12-14 13:35:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363137398] [2022-12-14 13:35:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-14 13:35:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-14 13:35:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=9661, Unknown=106, NotChecked=1428, Total=11556 [2022-12-14 13:35:54,900 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 0 states have call successors, (0), 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 13:36:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:00,376 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2022-12-14 13:36:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:36:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 0 states have call successors, (0), 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 13:36:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:00,377 INFO L225 Difference]: With dead ends: 137 [2022-12-14 13:36:00,377 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 13:36:00,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 163 SyntacticMatches, 12 SemanticMatches, 143 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=801, Invalid=18024, Unknown=109, NotChecked=1946, Total=20880 [2022-12-14 13:36:00,378 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 34 mSolverCounterUnsat, 128 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 3678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 128 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 563 Invalid, 3678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2990 Invalid, 128 Unknown, 526 Unchecked, 2.2s Time] [2022-12-14 13:36:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 13:36:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-12-14 13:36:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 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 13:36:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-12-14 13:36:00,379 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-12-14 13:36:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:00,379 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-12-14 13:36:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 0 states have call successors, (0), 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 13:36:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-12-14 13:36:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:36:00,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:00,380 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:00,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:00,582 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:36:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash 442355952, now seen corresponding path program 19 times [2022-12-14 13:36:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:00,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888765718] [2022-12-14 13:36:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 64 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:01,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:01,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888765718] [2022-12-14 13:36:01,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888765718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:01,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082740845] [2022-12-14 13:36:01,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:36:01,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:01,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:01,839 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:01,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 13:36:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-14 13:36:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:02,092 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:36:02,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:36:02,103 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:36:02,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:36:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:36:02,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:36:02,480 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 11 treesize of output 11 [2022-12-14 13:36:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082740845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976932172] [2022-12-14 13:36:04,115 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:36:04,115 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:04,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:04,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:04,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:04,131 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 13:36:04,150 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 13:36:04,162 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 21 treesize of output 1 [2022-12-14 13:36:04,169 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 21 treesize of output 1 [2022-12-14 13:36:04,190 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 13:36:04,195 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 21 treesize of output 1 [2022-12-14 13:36:04,200 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 21 treesize of output 1 [2022-12-14 13:36:04,215 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 21 treesize of output 1 [2022-12-14 13:36:04,230 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:36:04,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:36:04,237 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 21 treesize of output 1 [2022-12-14 13:36:04,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:36:04,251 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 13:36:04,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:36:04,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:36:04,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:36:04,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:36:04,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:36:04,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:36:04,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:04,401 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:36:04,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:36:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:04,428 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:36:04,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:36:04,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:04,462 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:36:04,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:36:04,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:36:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:36:04,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:36:04,661 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 11 treesize of output 7 [2022-12-14 13:36:04,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:36:04,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:36:04,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:36:09,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15311#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_406| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_405| Int)) (and (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_405|) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_405| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_406|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_406|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_405|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_406|) 1) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_406|))) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:36:09,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:36:09,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:36:09,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2022-12-14 13:36:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271055315] [2022-12-14 13:36:09,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:09,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 13:36:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 13:36:09,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=6212, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:36:09,606 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 70 states, 69 states have (on average 2.782608695652174) internal successors, (192), 69 states have internal predecessors, (192), 0 states have call successors, (0), 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 13:36:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:11,489 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-12-14 13:36:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 13:36:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.782608695652174) internal successors, (192), 69 states have internal predecessors, (192), 0 states have call successors, (0), 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 80 [2022-12-14 13:36:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:11,490 INFO L225 Difference]: With dead ends: 88 [2022-12-14 13:36:11,490 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 13:36:11,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3087 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1885, Invalid=10105, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 13:36:11,491 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 747 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:11,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 203 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:36:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 13:36:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-12-14 13:36:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 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 13:36:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-12-14 13:36:11,493 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2022-12-14 13:36:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:11,493 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-12-14 13:36:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.782608695652174) internal successors, (192), 69 states have internal predecessors, (192), 0 states have call successors, (0), 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 13:36:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-12-14 13:36:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 13:36:11,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:11,494 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:11,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 13:36:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 13:36:11,695 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:36:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1636194429, now seen corresponding path program 20 times [2022-12-14 13:36:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538088845] [2022-12-14 13:36:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:14,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538088845] [2022-12-14 13:36:14,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538088845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601381999] [2022-12-14 13:36:14,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:36:14,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:14,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:14,534 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:14,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 13:37:34,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 13:37:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:37:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 267 conjunts are in the unsatisfiable core [2022-12-14 13:37:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:34,608 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 13:37:35,297 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:37:35,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:37:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 13:37:35,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:35,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:35,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:37:35,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:37:35,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:37:35,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:37:35,805 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 13:37:35,998 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 13:37:36,204 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 13:37:36,424 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 13:37:36,646 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 13:37:36,869 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 13:37:37,091 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 13:37:37,315 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 13:37:37,539 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 13:37:37,783 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 13:37:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:38,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:37:38,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:37:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:38,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:38,160 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5385 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5385) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:37:42,964 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5385 (Array Int Int)) (v_ArrVal_5383 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5383) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5385) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:37:43,041 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5382 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5382) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:37:43,824 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5377 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5377) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 8)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:37:43,870 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5376) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 9)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-14 13:37:48,512 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5376 (Array Int Int)) (v_ArrVal_5375 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5375) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_5376) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 10)) 0)) is different from false [2022-12-14 13:37:48,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:37:48,522 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 26 treesize of output 27 [2022-12-14 13:37:48,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:48,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:37:48,529 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 37 treesize of output 32 [2022-12-14 13:37:48,531 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 7 treesize of output 3 [2022-12-14 13:37:48,535 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:37:48,535 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 13 treesize of output 12 [2022-12-14 13:37:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 97 not checked. [2022-12-14 13:37:49,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601381999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:49,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951776491] [2022-12-14 13:37:49,367 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:37:49,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:37:49,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:37:49,368 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:37:49,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:37:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:49,383 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 13:37:49,407 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 21 treesize of output 1 [2022-12-14 13:37:49,415 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 13:37:49,433 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 21 treesize of output 1 [2022-12-14 13:37:49,456 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 21 treesize of output 1 [2022-12-14 13:37:49,462 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 21 treesize of output 1 [2022-12-14 13:37:49,467 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 13:37:49,486 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 21 treesize of output 1 [2022-12-14 13:37:49,490 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 13:37:49,508 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:37:49,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:37:49,515 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 21 treesize of output 1 [2022-12-14 13:37:49,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:37:49,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:49,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:37:49,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:49,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:37:49,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:37:49,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:37:49,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:49,680 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:37:49,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:37:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:49,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:49,722 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:37:49,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:37:49,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:49,755 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:37:49,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:37:49,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:37:49,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:37:49,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:49,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:37:49,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:37:49,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:37:50,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:37:56,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16173#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_433| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_432| Int)) (and (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_432| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_433|)) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_433|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_433|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_432|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_433|) 1) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_432|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:37:56,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:37:56,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:56,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 40, 40] total 116 [2022-12-14 13:37:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370191972] [2022-12-14 13:37:56,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 13:37:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 13:37:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=14634, Unknown=212, NotChecked=1494, Total=16770 [2022-12-14 13:37:56,929 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 117 states, 117 states have (on average 1.9316239316239316) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 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 13:38:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:03,781 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2022-12-14 13:38:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 13:38:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9316239316239316) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 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 13:38:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:03,782 INFO L225 Difference]: With dead ends: 149 [2022-12-14 13:38:03,783 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 13:38:03,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 177 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 7667 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1008, Invalid=28546, Unknown=226, NotChecked=2082, Total=31862 [2022-12-14 13:38:03,784 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 40 mSolverCounterUnsat, 97 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 97 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:03,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 741 Invalid, 4631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3979 Invalid, 97 Unknown, 515 Unchecked, 2.3s Time] [2022-12-14 13:38:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 13:38:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-12-14 13:38:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 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 13:38:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-12-14 13:38:03,787 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2022-12-14 13:38:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:03,787 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-12-14 13:38:03,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9316239316239316) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 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 13:38:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-12-14 13:38:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:38:03,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:03,788 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:03,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 13:38:03,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:03,989 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:38:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash -759711557, now seen corresponding path program 21 times [2022-12-14 13:38:03,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205482608] [2022-12-14 13:38:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:03,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:05,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205482608] [2022-12-14 13:38:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205482608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:38:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435169689] [2022-12-14 13:38:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:38:05,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:38:05,438 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:38:05,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:38:07,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:38:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:38:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 129 conjunts are in the unsatisfiable core [2022-12-14 13:38:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:38:07,918 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:07,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:38:07,928 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:38:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:38:08,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:38:08,325 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:38:08,325 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 11 treesize of output 11 [2022-12-14 13:38:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:38:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435169689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:38:22,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144963025] [2022-12-14 13:38:22,749 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:38:22,749 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:38:22,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:38:22,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:38:22,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:38:22,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:38:22,762 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 13:38:22,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:22,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:22,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:22,834 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 21 treesize of output 1 [2022-12-14 13:38:22,842 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 21 treesize of output 1 [2022-12-14 13:38:22,849 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 13:38:22,873 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 13:38:22,879 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 21 treesize of output 1 [2022-12-14 13:38:22,893 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:22,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:38:22,903 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 21 treesize of output 1 [2022-12-14 13:38:22,920 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:38:22,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:38:22,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:22,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:38:22,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:23,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:38:23,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:38:23,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:38:23,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:23,134 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:38:23,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:38:23,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:23,167 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:38:23,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:38:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:23,204 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:38:23,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:38:23,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:23,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:23,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:23,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:23,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:23,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:23,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:38:28,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17112#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:38:28,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:38:28,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:38:28,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 71 [2022-12-14 13:38:28,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618027334] [2022-12-14 13:38:28,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:38:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 13:38:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 13:38:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=6436, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 13:38:28,180 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 72 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:38:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:29,724 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2022-12-14 13:38:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 13:38:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 72 states have internal predecessors, (208), 0 states have call successors, (0), 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 87 [2022-12-14 13:38:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:29,725 INFO L225 Difference]: With dead ends: 95 [2022-12-14 13:38:29,725 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 13:38:29,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=2259, Invalid=10623, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 13:38:29,726 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 804 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:29,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 181 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:38:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 13:38:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-12-14 13:38:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 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 13:38:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-12-14 13:38:29,729 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2022-12-14 13:38:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:29,729 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-12-14 13:38:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 72 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:38:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-12-14 13:38:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 13:38:29,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:29,729 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:29,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 13:38:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 13:38:29,931 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:38:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2102618222, now seen corresponding path program 22 times [2022-12-14 13:38:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791261297] [2022-12-14 13:38:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:33,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791261297] [2022-12-14 13:38:33,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791261297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:38:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029080441] [2022-12-14 13:38:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:38:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:38:33,438 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:38:33,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 13:38:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 217 conjunts are in the unsatisfiable core [2022-12-14 13:38:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:38:33,737 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 13:38:34,296 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 13:38:34,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:38:34,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:34,378 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:34,379 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-12-14 13:38:34,382 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 8 treesize of output 3 [2022-12-14 13:38:34,485 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 16 treesize of output 8 [2022-12-14 13:38:34,612 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:34,612 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-12-14 13:38:34,966 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 35 treesize of output 37 [2022-12-14 13:38:35,238 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 35 treesize of output 37 [2022-12-14 13:38:35,523 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 35 treesize of output 37 [2022-12-14 13:38:35,819 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 35 treesize of output 37 [2022-12-14 13:38:36,117 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 35 treesize of output 37 [2022-12-14 13:38:36,542 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 35 treesize of output 37 [2022-12-14 13:38:36,980 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:38:36,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 32 [2022-12-14 13:38:37,110 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 13:38:37,360 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 13:38:37,617 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 13:38:37,868 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 13:38:38,121 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 13:38:38,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:38,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:38:38,345 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 18 treesize of output 10 [2022-12-14 13:38:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:38,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:38:38,359 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6051 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6051) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:38:42,973 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6051 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6051) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:38:42,980 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6049 (Array Int Int)) (v_ArrVal_6051 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6049) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6051) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-14 13:38:42,987 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6051 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6051) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:38:42,994 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6048 (Array Int Int)) (v_ArrVal_6051 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6048) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6051) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:38:50,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:38:50,931 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 26 treesize of output 27 [2022-12-14 13:38:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:50,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:38:50,938 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 37 treesize of output 32 [2022-12-14 13:38:50,942 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 24 treesize of output 22 [2022-12-14 13:38:50,945 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 11 treesize of output 7 [2022-12-14 13:38:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 121 not checked. [2022-12-14 13:38:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029080441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:38:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433083101] [2022-12-14 13:38:51,284 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:38:51,284 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:38:51,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:38:51,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:38:51,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:38:51,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:38:51,296 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 13:38:51,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:51,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,362 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 13:38:51,370 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 21 treesize of output 1 [2022-12-14 13:38:51,375 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 21 treesize of output 1 [2022-12-14 13:38:51,407 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:38:51,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:38:51,417 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 21 treesize of output 1 [2022-12-14 13:38:51,427 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 13:38:51,434 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 21 treesize of output 1 [2022-12-14 13:38:51,454 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:38:51,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:38:51,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:51,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:38:51,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:38:51,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:38:51,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:38:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:51,668 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:38:51,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:38:51,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:51,718 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:38:51,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:38:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:38:51,753 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:38:51,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:38:51,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:51,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:38:51,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:38:52,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:38:56,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18043#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:38:56,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:38:56,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:38:56,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 45, 45] total 126 [2022-12-14 13:38:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96972012] [2022-12-14 13:38:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:38:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-14 13:38:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-14 13:38:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=17265, Unknown=93, NotChecked=1340, Total=19182 [2022-12-14 13:38:56,848 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 127 states, 127 states have (on average 1.8976377952755905) internal successors, (241), 126 states have internal predecessors, (241), 0 states have call successors, (0), 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 13:39:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:39:05,996 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2022-12-14 13:39:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:39:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.8976377952755905) internal successors, (241), 126 states have internal predecessors, (241), 0 states have call successors, (0), 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 92 [2022-12-14 13:39:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:39:05,996 INFO L225 Difference]: With dead ends: 161 [2022-12-14 13:39:05,997 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 13:39:05,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 7353 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=1015, Invalid=30062, Unknown=95, NotChecked=1770, Total=32942 [2022-12-14 13:39:05,998 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 221 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 5101 mSolverCounterSat, 51 mSolverCounterUnsat, 104 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 5661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5101 IncrementalHoareTripleChecker+Invalid, 104 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:39:05,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 893 Invalid, 5661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5101 Invalid, 104 Unknown, 405 Unchecked, 3.4s Time] [2022-12-14 13:39:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 13:39:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-12-14 13:39:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:39:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-12-14 13:39:05,999 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-12-14 13:39:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:39:05,999 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-12-14 13:39:05,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.8976377952755905) internal successors, (241), 126 states have internal predecessors, (241), 0 states have call successors, (0), 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 13:39:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-12-14 13:39:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:39:06,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:39:06,000 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:39:06,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 13:39:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:06,201 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:39:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:39:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash 565712276, now seen corresponding path program 23 times [2022-12-14 13:39:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:39:06,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930576226] [2022-12-14 13:39:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:06,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:39:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 100 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:39:07,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:39:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930576226] [2022-12-14 13:39:07,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930576226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:39:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119104046] [2022-12-14 13:39:07,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:39:07,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:39:07,859 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:39:07,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 13:40:20,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:40:20,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:40:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 13:40:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:20,309 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:40:20,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:40:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:40:20,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:40:20,731 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:40:20,731 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 11 treesize of output 11 [2022-12-14 13:40:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:22,253 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 30 treesize of output 26 [2022-12-14 13:40:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:23,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119104046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:40:23,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84725481] [2022-12-14 13:40:23,369 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:40:23,369 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:40:23,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:40:23,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:40:23,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:40:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:40:23,386 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 13:40:23,408 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 21 treesize of output 1 [2022-12-14 13:40:23,416 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 21 treesize of output 1 [2022-12-14 13:40:23,425 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 13:40:23,450 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 21 treesize of output 1 [2022-12-14 13:40:23,457 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 13:40:23,463 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 21 treesize of output 1 [2022-12-14 13:40:23,480 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 21 treesize of output 1 [2022-12-14 13:40:23,486 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 21 treesize of output 1 [2022-12-14 13:40:23,502 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:40:23,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:40:23,524 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:40:23,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:40:23,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:40:23,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:40:23,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:40:23,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:40:23,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:40:23,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:40:23,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:40:23,717 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-12-14 13:40:23,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-12-14 13:40:23,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:40:23,779 INFO L321 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2022-12-14 13:40:23,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2022-12-14 13:40:23,821 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-12-14 13:40:23,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-14 13:40:23,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:40:23,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:40:23,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:40:24,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:40:24,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:40:24,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:40:24,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:40:29,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19049#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_518| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_517| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_518|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_518|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_517|) 0)) (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_517|) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_517| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_518|)))) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:40:29,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:40:29,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:40:29,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 91 [2022-12-14 13:40:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841134722] [2022-12-14 13:40:29,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:40:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-12-14 13:40:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-12-14 13:40:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1036, Invalid=10094, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 13:40:29,482 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 93 states, 92 states have (on average 3.0652173913043477) internal successors, (282), 92 states have internal predecessors, (282), 0 states have call successors, (0), 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 13:40:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:32,195 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-12-14 13:40:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 13:40:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.0652173913043477) internal successors, (282), 92 states have internal predecessors, (282), 0 states have call successors, (0), 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 94 [2022-12-14 13:40:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:32,195 INFO L225 Difference]: With dead ends: 102 [2022-12-14 13:40:32,195 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 13:40:32,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2949, Invalid=15683, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 13:40:32,196 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 884 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:32,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 203 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:40:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 13:40:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-12-14 13:40:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 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 13:40:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-12-14 13:40:32,198 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2022-12-14 13:40:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:32,198 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-12-14 13:40:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.0652173913043477) internal successors, (282), 92 states have internal predecessors, (282), 0 states have call successors, (0), 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 13:40:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-12-14 13:40:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 13:40:32,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:32,198 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:40:32,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 13:40:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 13:40:32,400 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:40:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 64051801, now seen corresponding path program 24 times [2022-12-14 13:40:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:32,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896865079] [2022-12-14 13:40:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:32,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:35,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:35,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896865079] [2022-12-14 13:40:35,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896865079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:35,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84488607] [2022-12-14 13:40:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:40:35,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:35,993 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:35,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:40:41,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:40:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:40:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 232 conjunts are in the unsatisfiable core [2022-12-14 13:40:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:41,845 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 13:40:42,781 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 13:40:42,790 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:40:42,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-14 13:40:42,881 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 13:40:42,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:40:42,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:40:43,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 13:40:43,231 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 13:40:43,353 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 13:40:43,447 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 13:40:43,531 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 13:40:43,613 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 13:40:43,690 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 13:40:43,752 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 13:40:43,825 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 13:40:43,889 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 13:40:43,976 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 13:40:44,069 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 13:40:44,083 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 14 treesize of output 16 [2022-12-14 13:40:44,143 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 15 treesize of output 7 [2022-12-14 13:40:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:44,153 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:40:44,157 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:40:48,756 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:40:48,763 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int)) (v_ArrVal_6759 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6759) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-14 13:40:55,271 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) is different from false [2022-12-14 13:41:04,877 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int)) (v_ArrVal_6755 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6755) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0)) is different from false [2022-12-14 13:41:04,883 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:41:04,890 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int)) (v_ArrVal_6754 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_6754) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 8)))) is different from false [2022-12-14 13:41:04,896 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 9)) 0)) is different from false [2022-12-14 13:41:17,520 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int)) (v_ArrVal_6750 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_6750) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 12)) 0)) is different from false [2022-12-14 13:41:17,527 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6762 (Array Int Int)) (v_ArrVal_6750 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_6750) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_6762) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 12)) 0)) is different from false [2022-12-14 13:41:22,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:41:22,752 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 26 treesize of output 27 [2022-12-14 13:41:22,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:41:22,758 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 71 treesize of output 66 [2022-12-14 13:41:22,769 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 54 treesize of output 46 [2022-12-14 13:41:22,773 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 24 treesize of output 20 [2022-12-14 13:41:24,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:41:24,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 53 [2022-12-14 13:41:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 293 refuted. 0 times theorem prover too weak. 0 trivial. 229 not checked. [2022-12-14 13:41:24,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84488607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:41:24,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829098612] [2022-12-14 13:41:24,533 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:41:24,533 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:41:24,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:41:24,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:41:24,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:41:24,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:41:24,544 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 13:41:24,570 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 21 treesize of output 1 [2022-12-14 13:41:24,580 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 21 treesize of output 1 [2022-12-14 13:41:24,589 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 13:41:24,611 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 21 treesize of output 1 [2022-12-14 13:41:24,618 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 13:41:24,626 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 21 treesize of output 1 [2022-12-14 13:41:24,646 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 13:41:24,653 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 21 treesize of output 1 [2022-12-14 13:41:24,674 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:41:24,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:41:24,681 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 21 treesize of output 1 [2022-12-14 13:41:24,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:41:24,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:24,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:41:24,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:24,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:41:24,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:41:24,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:41:24,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:24,863 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:41:24,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:41:24,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:24,896 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:41:24,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:41:24,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:24,930 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:41:24,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-12-14 13:41:25,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:25,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:25,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:25,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:25,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:25,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:41:32,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20045#(and (= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |#NULL.base|) (not (<= (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|))) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.offset|) (= |ULTIMATE.start_cstpncpy_#t~post6#1.base| |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (not (= (mod |ULTIMATE.start_cstpncpy_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cstpncpy_~d~0#1.offset| (+ |ULTIMATE.start_cstpncpy_#t~post5#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (exists ((|v_ULTIMATE.start_cstpncpy_#t~post5#1.base_549| Int) (|v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_548| Int)) (and (<= 0 |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_548|) (= (select |#valid| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_549|) 1) (<= (+ |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_548| 1) (select |#length| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_549|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstpncpy_#t~post5#1.base_549|) |v_ULTIMATE.start_cstpncpy_#t~post5#1.offset_548|) 0)))) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cstpncpy_~d~0#1.base| |ULTIMATE.start_cstpncpy_#t~post5#1.base|))' at error location [2022-12-14 13:41:32,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:41:32,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:41:32,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 46, 46] total 130 [2022-12-14 13:41:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117935819] [2022-12-14 13:41:32,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:41:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-14 13:41:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:41:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-14 13:41:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=16682, Unknown=429, NotChecked=2992, Total=20592 [2022-12-14 13:41:32,132 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 131 states, 131 states have (on average 1.9541984732824427) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 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 13:41:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:41:43,858 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2022-12-14 13:41:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 13:41:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9541984732824427) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 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 99 [2022-12-14 13:41:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:41:43,859 INFO L225 Difference]: With dead ends: 173 [2022-12-14 13:41:43,859 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 13:41:43,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 182 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 7420 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=951, Invalid=28413, Unknown=436, NotChecked=3872, Total=33672 [2022-12-14 13:41:43,860 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 135 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 5395 mSolverCounterSat, 48 mSolverCounterUnsat, 87 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 6532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 5395 IncrementalHoareTripleChecker+Invalid, 87 IncrementalHoareTripleChecker+Unknown, 1002 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:41:43,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 984 Invalid, 6532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 5395 Invalid, 87 Unknown, 1002 Unchecked, 3.9s Time] [2022-12-14 13:41:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 13:41:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-12-14 13:41:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 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 13:41:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-12-14 13:41:43,862 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2022-12-14 13:41:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:41:43,862 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-12-14 13:41:43,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9541984732824427) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 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 13:41:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-12-14 13:41:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 13:41:43,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:41:43,862 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:41:43,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:41:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:41:44,064 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:41:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:41:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 373192215, now seen corresponding path program 25 times [2022-12-14 13:41:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:41:44,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691760957] [2022-12-14 13:41:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:41:44,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:41:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:41:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:41:45,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:41:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691760957] [2022-12-14 13:41:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691760957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:41:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970736846] [2022-12-14 13:41:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:41:45,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:41:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:41:45,688 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:41:45,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 13:41:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:41:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-14 13:41:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:41:46,343 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:41:46,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:41:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:41:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:41:49,093 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 44 treesize of output 38 [2022-12-14 13:41:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:41:49,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970736846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:41:49,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [861258417] [2022-12-14 13:41:49,375 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:41:49,375 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:41:49,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:41:49,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:41:49,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:41:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:41:49,388 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 13:41:49,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:49,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:49,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:49,464 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 21 treesize of output 1 [2022-12-14 13:41:49,470 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 13:41:49,477 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 21 treesize of output 1 [2022-12-14 13:41:49,504 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 21 treesize of output 1 [2022-12-14 13:41:49,509 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 21 treesize of output 1 [2022-12-14 13:41:49,514 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 13:41:49,537 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:41:49,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:41:49,562 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:41:49,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:41:49,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:41:49,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:49,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:49,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-14 13:41:49,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-12-14 13:41:49,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 13:41:49,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:49,793 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:41:49,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:41:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:49,827 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 13:41:49,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-12-14 13:41:49,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:49,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:41:49,887 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:41:49,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:41:49,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:49,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:50,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:50,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:50,120 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:41:50,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:41:50,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:41:54,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21107#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstpncpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~#dst#1.base|) (<= 1 |ULTIMATE.start_cstpncpy_~d~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstpncpy_#in~n#1|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (= |ULTIMATE.start_cstpncpy_~#dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_cstpncpy_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstpncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#t~post5#1.base|) (<= 0 |ULTIMATE.start_cstpncpy_#in~src#1.base|) (<= |ULTIMATE.start_cstpncpy_~src#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpncpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstpncpy_#t~post6#1.offset| 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_cstpncpy_#t~post6#1.offset|) (<= 0 |ULTIMATE.start_cstpncpy_~d~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstpncpy_~n#1| 2147483647) (<= 1 |ULTIMATE.start_cstpncpy_~s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:41:54,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:41:54,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:41:54,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 85 [2022-12-14 13:41:54,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480890640] [2022-12-14 13:41:54,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:41:54,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 13:41:54,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:41:54,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 13:41:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=8973, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 13:41:54,477 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 87 states, 86 states have (on average 3.197674418604651) internal successors, (275), 86 states have internal predecessors, (275), 0 states have call successors, (0), 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 13:41:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:41:58,078 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-12-14 13:41:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 13:41:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.197674418604651) internal successors, (275), 86 states have internal predecessors, (275), 0 states have call successors, (0), 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 101 [2022-12-14 13:41:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:41:58,079 INFO L225 Difference]: With dead ends: 109 [2022-12-14 13:41:58,079 INFO L226 Difference]: Without dead ends: 109 [2022-12-14 13:41:58,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 222 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4805 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2288, Invalid=14742, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 13:41:58,080 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 764 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:41:58,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 361 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:41:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-14 13:41:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-12-14 13:41:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 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 13:41:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-12-14 13:41:58,082 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2022-12-14 13:41:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:41:58,082 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-12-14 13:41:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.197674418604651) internal successors, (275), 86 states have internal predecessors, (275), 0 states have call successors, (0), 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 13:41:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-12-14 13:41:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 13:41:58,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:41:58,083 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:41:58,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 13:41:58,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:41:58,284 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 13:41:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:41:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1546529866, now seen corresponding path program 26 times [2022-12-14 13:41:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:41:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821418862] [2022-12-14 13:41:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:41:58,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:41:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:42:02,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:42:02,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821418862] [2022-12-14 13:42:02,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821418862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:42:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920878072] [2022-12-14 13:42:02,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:42:02,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:42:02,227 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:42:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb6c59a-20ce-46e5-a51c-0d890b653ef3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process