./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba --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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- 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-b5237d8 [2022-11-22 01:52:22,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:52:22,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:52:22,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:52:22,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:52:22,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:52:22,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:52:22,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:52:22,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:52:22,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:52:22,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:52:22,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:52:22,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:52:22,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:52:22,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:52:22,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:52:22,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:52:22,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:52:22,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:52:22,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:52:22,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:52:22,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:52:22,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:52:22,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:52:22,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:52:22,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:52:22,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:52:22,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:52:22,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:52:22,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:52:22,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:52:22,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:52:22,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:52:22,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:52:22,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:52:22,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:52:22,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:52:22,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:52:22,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:52:22,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:52:22,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:52:22,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:52:22,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:52:22,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:52:22,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:52:22,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:52:22,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:52:22,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:52:22,906 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:52:22,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:52:22,906 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:52:22,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:52:22,907 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:52:22,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:52:22,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:52:22,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:52:22,908 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:52:22,908 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:52:22,908 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:52:22,909 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:52:22,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:52:22,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:52:22,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:52:22,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:52:22,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:52:22,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:52:22,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:52:22,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:52:22,911 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:52:22,911 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:52:22,911 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:52:22,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:52:22,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:52:22,912 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:52:22,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:52:22,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:52:22,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:52:22,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:22,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:52:22,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:52:22,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:52:22,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:52:22,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:52:22,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:52:22,914 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_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2022-11-22 01:52:23,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:52:23,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:52:23,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:52:23,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:52:23,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:52:23,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2022-11-22 01:52:26,329 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:52:26,674 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:52:26,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2022-11-22 01:52:26,688 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/data/860c6d8c6/8cf831e3eb1f4492b7da94a66850a9dd/FLAG78fad5f5b [2022-11-22 01:52:26,703 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/data/860c6d8c6/8cf831e3eb1f4492b7da94a66850a9dd [2022-11-22 01:52:26,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:52:26,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:52:26,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:26,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:52:26,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:52:26,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:26" (1/1) ... [2022-11-22 01:52:26,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11fd3932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:26, skipping insertion in model container [2022-11-22 01:52:26,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:26" (1/1) ... [2022-11-22 01:52:26,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:52:26,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:52:27,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:27,135 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:52:27,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:27,210 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:52:27,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27 WrapperNode [2022-11-22 01:52:27,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:27,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:27,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:52:27,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:52:27,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,260 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2022-11-22 01:52:27,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:27,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:52:27,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:52:27,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:52:27,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:52:27,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:52:27,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:52:27,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:52:27,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (1/1) ... [2022-11-22 01:52:27,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:27,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:27,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:52:27,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:52:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:52:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:52:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:52:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:52:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:52:27,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:52:27,599 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:52:27,602 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:52:27,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:52:27,972 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:52:27,972 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:52:27,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:27 BoogieIcfgContainer [2022-11-22 01:52:27,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:52:27,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:52:27,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:52:27,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:52:27,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:52:26" (1/3) ... [2022-11-22 01:52:27,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dd6624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:27, skipping insertion in model container [2022-11-22 01:52:27,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:27" (2/3) ... [2022-11-22 01:52:27,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dd6624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:27, skipping insertion in model container [2022-11-22 01:52:27,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:27" (3/3) ... [2022-11-22 01:52:27,986 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2022-11-22 01:52:28,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:52:28,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-22 01:52:28,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:52:28,104 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;@7a1191d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:52:28,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-22 01:52:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 38 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) [2022-11-22 01:52:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:52:28,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:28,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:52:28,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash 165069, now seen corresponding path program 1 times [2022-11-22 01:52:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657910372] [2022-11-22 01:52:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:28,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657910372] [2022-11-22 01:52:28,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657910372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:28,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:28,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929358239] [2022-11-22 01:52:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:28,628 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-11-22 01:52:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:28,727 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-11-22 01:52:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:28,730 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 [2022-11-22 01:52:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:28,738 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:52:28,738 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 01:52:28,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:28,743 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:28,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 01:52:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-22 01:52:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 35 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) [2022-11-22 01:52:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-11-22 01:52:28,795 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 3 [2022-11-22 01:52:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:28,796 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-11-22 01:52:28,796 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) [2022-11-22 01:52:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-11-22 01:52:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:52:28,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:28,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:52:28,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:52:28,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash 165070, now seen corresponding path program 1 times [2022-11-22 01:52:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:28,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068631184] [2022-11-22 01:52:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:29,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:29,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068631184] [2022-11-22 01:52:29,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068631184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:29,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:29,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:52:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053854348] [2022-11-22 01:52:29,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:29,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:29,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:29,314 INFO L87 Difference]: Start difference. First operand 36 states and 43 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) [2022-11-22 01:52:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:29,523 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-22 01:52:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:29,524 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 [2022-11-22 01:52:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:29,525 INFO L225 Difference]: With dead ends: 70 [2022-11-22 01:52:29,528 INFO L226 Difference]: Without dead ends: 70 [2022-11-22 01:52:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:29,531 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:29,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-22 01:52:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2022-11-22 01:52:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 2.0) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-22 01:52:29,545 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 3 [2022-11-22 01:52:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:29,546 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-22 01:52:29,546 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) [2022-11-22 01:52:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-22 01:52:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:52:29,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:29,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:52:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:52:29,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:29,558 INFO L85 PathProgramCache]: Analyzing trace with hash 5224349, now seen corresponding path program 1 times [2022-11-22 01:52:29,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:29,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059202893] [2022-11-22 01:52:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:29,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:29,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:29,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059202893] [2022-11-22 01:52:29,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059202893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:29,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:29,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:29,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711310167] [2022-11-22 01:52:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:29,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:29,665 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:29,702 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-22 01:52:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:52:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:29,704 INFO L225 Difference]: With dead ends: 36 [2022-11-22 01:52:29,704 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 01:52:29,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:29,706 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:29,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 01:52:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-22 01:52:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 35 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) [2022-11-22 01:52:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-22 01:52:29,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 4 [2022-11-22 01:52:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:29,712 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-22 01:52:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-22 01:52:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:52:29,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:29,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:52:29,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:52:29,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash 5224350, now seen corresponding path program 1 times [2022-11-22 01:52:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213025997] [2022-11-22 01:52:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:29,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:29,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213025997] [2022-11-22 01:52:29,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213025997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:29,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:29,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213898428] [2022-11-22 01:52:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:29,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:29,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:29,938 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:30,071 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-11-22 01:52:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:52:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:30,072 INFO L225 Difference]: With dead ends: 65 [2022-11-22 01:52:30,072 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 01:52:30,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:30,074 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:30,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 60 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 01:52:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-11-22 01:52:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.88) internal successors, (47), 37 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) [2022-11-22 01:52:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-11-22 01:52:30,079 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 4 [2022-11-22 01:52:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:30,080 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-11-22 01:52:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-11-22 01:52:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:52:30,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:30,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:52:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:52:30,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 5227335, now seen corresponding path program 1 times [2022-11-22 01:52:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756702931] [2022-11-22 01:52:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:30,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:30,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756702931] [2022-11-22 01:52:30,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756702931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:30,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:30,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:30,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075614090] [2022-11-22 01:52:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:30,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:30,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:30,241 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:30,288 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-22 01:52:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:52:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:30,289 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:52:30,290 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 01:52:30,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:30,291 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:30,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 01:52:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-22 01:52:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.84) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-11-22 01:52:30,296 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 4 [2022-11-22 01:52:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:30,296 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-11-22 01:52:30,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-11-22 01:52:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:52:30,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:30,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:52:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:52:30,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash 162047379, now seen corresponding path program 1 times [2022-11-22 01:52:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:30,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057201840] [2022-11-22 01:52:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:30,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:30,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057201840] [2022-11-22 01:52:30,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057201840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:30,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:30,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:52:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241832340] [2022-11-22 01:52:30,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:30,556 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:30,605 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-22 01:52:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:52:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:30,608 INFO L225 Difference]: With dead ends: 36 [2022-11-22 01:52:30,608 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 01:52:30,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:30,611 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:30,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:30,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 01:52:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-22 01:52:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.8) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-22 01:52:30,628 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 5 [2022-11-22 01:52:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:30,628 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-22 01:52:30,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-22 01:52:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:52:30,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:30,629 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-22 01:52:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:52:30,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash 158730070, now seen corresponding path program 1 times [2022-11-22 01:52:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:30,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927540491] [2022-11-22 01:52:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:30,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927540491] [2022-11-22 01:52:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927540491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40446533] [2022-11-22 01:52:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:30,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:52:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:52:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:31,150 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:52:31,152 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 [2022-11-22 01:52:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:31,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:31,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40446533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:31,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795897178] [2022-11-22 01:52:31,587 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-22 01:52:31,587 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:31,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:31,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:31,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:31,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:31,675 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 [2022-11-22 01:52:31,768 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 11 treesize of output 7 [2022-11-22 01:52:31,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:31,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:32,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:52:32,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '605#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:52:32,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:52:32,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:52:32,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 01:52:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045653941] [2022-11-22 01:52:32,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:52:32,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:52:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:52:32,523 INFO L87 Difference]: Start difference. First operand 36 states and 45 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) [2022-11-22 01:52:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:32,878 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-11-22 01:52:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:52:32,878 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 [2022-11-22 01:52:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:32,879 INFO L225 Difference]: With dead ends: 96 [2022-11-22 01:52:32,879 INFO L226 Difference]: Without dead ends: 96 [2022-11-22 01:52:32,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:52:32,880 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 177 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:32,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 220 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-22 01:52:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 33. [2022-11-22 01:52:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 32 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) [2022-11-22 01:52:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-22 01:52:32,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 5 [2022-11-22 01:52:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:32,884 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-22 01:52:32,884 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) [2022-11-22 01:52:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-22 01:52:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:52:32,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:32,885 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-22 01:52:32,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:52:33,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash 725717976, now seen corresponding path program 1 times [2022-11-22 01:52:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057317875] [2022-11-22 01:52:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:33,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:33,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057317875] [2022-11-22 01:52:33,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057317875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123404365] [2022-11-22 01:52:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:33,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:33,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:52:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:33,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:52:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:33,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:33,517 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 [2022-11-22 01:52:33,531 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 18 treesize of output 16 [2022-11-22 01:52:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123404365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795431897] [2022-11-22 01:52:33,884 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-22 01:52:33,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:33,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:33,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:33,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:33,927 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 [2022-11-22 01:52:33,982 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 11 treesize of output 7 [2022-11-22 01:52:34,052 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 [2022-11-22 01:52:34,122 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 [2022-11-22 01:52:34,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:52:34,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '787#(and (<= |ULTIMATE.start_main_~length~0#1| 1) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:52:34,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:52:34,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:52:34,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-22 01:52:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904148670] [2022-11-22 01:52:34,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:34,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:52:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:52:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:52:34,732 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,024 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-11-22 01:52:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:52:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:52:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,025 INFO L225 Difference]: With dead ends: 83 [2022-11-22 01:52:35,025 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 01:52:35,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:52:35,026 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 357 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 194 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 01:52:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 30. [2022-11-22 01:52:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-22 01:52:35,030 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 6 [2022-11-22 01:52:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:35,030 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-22 01:52:35,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-22 01:52:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:52:35,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:35,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:35,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:52:35,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 384363697, now seen corresponding path program 1 times [2022-11-22 01:52:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061935807] [2022-11-22 01:52:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:35,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:35,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061935807] [2022-11-22 01:52:35,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061935807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:35,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:35,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57762888] [2022-11-22 01:52:35,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:35,269 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,295 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-22 01:52:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:52:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,297 INFO L225 Difference]: With dead ends: 34 [2022-11-22 01:52:35,297 INFO L226 Difference]: Without dead ends: 34 [2022-11-22 01:52:35,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:35,300 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-22 01:52:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-11-22 01:52:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-22 01:52:35,307 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 9 [2022-11-22 01:52:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:35,307 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-22 01:52:35,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-22 01:52:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:52:35,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:35,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:35,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:52:35,309 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash 384337600, now seen corresponding path program 1 times [2022-11-22 01:52:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:35,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109720400] [2022-11-22 01:52:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:35,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109720400] [2022-11-22 01:52:35,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109720400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:35,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:35,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807640704] [2022-11-22 01:52:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:35,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:35,443 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,495 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-22 01:52:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:52:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,499 INFO L225 Difference]: With dead ends: 45 [2022-11-22 01:52:35,499 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 01:52:35,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:35,501 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 01:52:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-11-22 01:52:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 35 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) [2022-11-22 01:52:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-11-22 01:52:35,511 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 9 [2022-11-22 01:52:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:35,511 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-11-22 01:52:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-11-22 01:52:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:52:35,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:35,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:35,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:52:35,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash 384337599, now seen corresponding path program 1 times [2022-11-22 01:52:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729991674] [2022-11-22 01:52:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:35,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:35,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:35,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729991674] [2022-11-22 01:52:35,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729991674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:35,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:35,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620880248] [2022-11-22 01:52:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:35,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:35,565 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,604 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-22 01:52:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:52:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,606 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:52:35,607 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:52:35,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:35,608 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:52:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-22 01:52:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 34 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) [2022-11-22 01:52:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-22 01:52:35,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 9 [2022-11-22 01:52:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:35,621 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-22 01:52:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-22 01:52:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:52:35,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:35,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:35,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:52:35,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash 383538272, now seen corresponding path program 1 times [2022-11-22 01:52:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508729044] [2022-11-22 01:52:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:35,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:35,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508729044] [2022-11-22 01:52:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508729044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:35,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389222518] [2022-11-22 01:52:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:35,729 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,774 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-11-22 01:52:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:52:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,775 INFO L225 Difference]: With dead ends: 34 [2022-11-22 01:52:35,776 INFO L226 Difference]: Without dead ends: 34 [2022-11-22 01:52:35,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:35,776 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-22 01:52:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-22 01:52:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 33 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) [2022-11-22 01:52:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-22 01:52:35,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 9 [2022-11-22 01:52:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:35,783 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-22 01:52:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-22 01:52:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:52:35,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:35,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:52:35,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 383538273, now seen corresponding path program 1 times [2022-11-22 01:52:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872613605] [2022-11-22 01:52:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:35,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:35,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872613605] [2022-11-22 01:52:35,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872613605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:35,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:35,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364714969] [2022-11-22 01:52:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:35,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:35,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:35,948 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:36,019 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-22 01:52:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:52:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:36,021 INFO L225 Difference]: With dead ends: 43 [2022-11-22 01:52:36,021 INFO L226 Difference]: Without dead ends: 43 [2022-11-22 01:52:36,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:52:36,022 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:36,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-22 01:52:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-11-22 01:52:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 34 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) [2022-11-22 01:52:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-22 01:52:36,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 9 [2022-11-22 01:52:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:36,025 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-22 01:52:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-22 01:52:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:52:36,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:36,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:36,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:52:36,026 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash -970431161, now seen corresponding path program 1 times [2022-11-22 01:52:36,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:36,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220413347] [2022-11-22 01:52:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:36,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220413347] [2022-11-22 01:52:36,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220413347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:36,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:36,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181898026] [2022-11-22 01:52:36,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:36,083 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:36,127 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-11-22 01:52:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2022-11-22 01:52:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:36,128 INFO L225 Difference]: With dead ends: 34 [2022-11-22 01:52:36,128 INFO L226 Difference]: Without dead ends: 34 [2022-11-22 01:52:36,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:36,129 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:36,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-22 01:52:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-22 01:52:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 33 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) [2022-11-22 01:52:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-22 01:52:36,134 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 10 [2022-11-22 01:52:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:36,134 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-22 01:52:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-22 01:52:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:52:36,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:36,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:36,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:52:36,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -970431160, now seen corresponding path program 1 times [2022-11-22 01:52:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:36,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698247873] [2022-11-22 01:52:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:36,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698247873] [2022-11-22 01:52:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698247873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:36,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996973261] [2022-11-22 01:52:36,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:36,339 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:36,446 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-11-22 01:52:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-22 01:52:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:36,447 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:52:36,448 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 01:52:36,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:52:36,449 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:36,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 41 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 01:52:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-11-22 01:52:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-22 01:52:36,451 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 10 [2022-11-22 01:52:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:36,451 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-22 01:52:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-22 01:52:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:52:36,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:36,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:36,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:52:36,452 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash -995215412, now seen corresponding path program 1 times [2022-11-22 01:52:36,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:36,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570285483] [2022-11-22 01:52:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:36,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570285483] [2022-11-22 01:52:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570285483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:36,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:36,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:52:36,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227677234] [2022-11-22 01:52:36,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:36,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:36,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:36,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:36,543 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:36,608 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-22 01:52:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:52:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:36,610 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:52:36,610 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:52:36,610 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 [2022-11-22 01:52:36,611 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:36,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 34 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:52:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-22 01:52:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 34 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) [2022-11-22 01:52:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-22 01:52:36,615 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 10 [2022-11-22 01:52:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:36,616 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-22 01:52:36,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-22 01:52:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:52:36,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:36,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:36,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 01:52:36,620 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -995215411, now seen corresponding path program 1 times [2022-11-22 01:52:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115117502] [2022-11-22 01:52:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:36,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115117502] [2022-11-22 01:52:36,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115117502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:36,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:52:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791991046] [2022-11-22 01:52:36,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:52:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:52:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:36,794 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:36,884 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-11-22 01:52:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:52:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:36,885 INFO L225 Difference]: With dead ends: 44 [2022-11-22 01:52:36,885 INFO L226 Difference]: Without dead ends: 44 [2022-11-22 01:52:36,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:52:36,887 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:36,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-22 01:52:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-11-22 01:52:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-22 01:52:36,889 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 10 [2022-11-22 01:52:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-22 01:52:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-22 01:52:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:52:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:36,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 01:52:36,895 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -786921272, now seen corresponding path program 1 times [2022-11-22 01:52:36,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570671320] [2022-11-22 01:52:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:37,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570671320] [2022-11-22 01:52:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570671320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:37,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:37,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:52:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177875510] [2022-11-22 01:52:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:37,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:37,119 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-22 01:52:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:37,153 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-22 01:52:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-11-22 01:52:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:37,155 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:52:37,155 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 01:52:37,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:37,156 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:37,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 01:52:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-22 01:52:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 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) [2022-11-22 01:52:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-22 01:52:37,159 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 11 [2022-11-22 01:52:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:37,162 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-22 01:52:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-22 01:52:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-22 01:52:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:52:37,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:37,164 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:37,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 01:52:37,164 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -689767796, now seen corresponding path program 1 times [2022-11-22 01:52:37,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:37,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990363038] [2022-11-22 01:52:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:37,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:37,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990363038] [2022-11-22 01:52:37,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990363038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:37,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:37,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:52:37,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382700166] [2022-11-22 01:52:37,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:52:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:52:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:52:37,403 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:37,515 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-22 01:52:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:52:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:52:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:37,516 INFO L225 Difference]: With dead ends: 61 [2022-11-22 01:52:37,516 INFO L226 Difference]: Without dead ends: 61 [2022-11-22 01:52:37,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:52:37,517 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:37,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 114 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-22 01:52:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2022-11-22 01:52:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.40625) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-22 01:52:37,520 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 13 [2022-11-22 01:52:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:37,520 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-22 01:52:37,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-22 01:52:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:52:37,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:37,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:37,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 01:52:37,521 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash -804443874, now seen corresponding path program 1 times [2022-11-22 01:52:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:37,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429700684] [2022-11-22 01:52:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:37,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429700684] [2022-11-22 01:52:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429700684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:37,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:37,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:52:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255777731] [2022-11-22 01:52:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:52:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:52:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:52:37,792 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:37,903 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-11-22 01:52:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:52:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 01:52:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:37,904 INFO L225 Difference]: With dead ends: 48 [2022-11-22 01:52:37,904 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 01:52:37,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:52:37,905 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:37,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 01:52:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-22 01:52:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 37 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) [2022-11-22 01:52:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-11-22 01:52:37,908 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 14 [2022-11-22 01:52:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:37,908 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-11-22 01:52:37,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-11-22 01:52:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:52:37,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:37,909 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 01:52:37,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -521388142, now seen corresponding path program 1 times [2022-11-22 01:52:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186007078] [2022-11-22 01:52:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:38,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186007078] [2022-11-22 01:52:38,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186007078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095110742] [2022-11-22 01:52:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:38,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:38,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:52:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:52:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:38,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:52:38,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:52:38,419 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 13 treesize of output 9 [2022-11-22 01:52:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:38,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:38,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095110742] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:38,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:52:38,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 17 [2022-11-22 01:52:38,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265434961] [2022-11-22 01:52:38,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:38,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:52:38,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:52:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:52:38,674 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:38,717 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-22 01:52:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:52:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:38,718 INFO L225 Difference]: With dead ends: 38 [2022-11-22 01:52:38,719 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:52:38,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:52:38,720 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:38,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 20 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:52:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-22 01:52:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 37 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) [2022-11-22 01:52:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-22 01:52:38,722 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 15 [2022-11-22 01:52:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:38,723 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-22 01:52:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-22 01:52:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:52:38,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:38,724 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:38,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:38,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:38,932 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:38,932 INFO L85 PathProgramCache]: Analyzing trace with hash 615498957, now seen corresponding path program 1 times [2022-11-22 01:52:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218430736] [2022-11-22 01:52:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:52:39,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:39,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218430736] [2022-11-22 01:52:39,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218430736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:39,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:39,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:52:39,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108029050] [2022-11-22 01:52:39,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:39,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:39,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:39,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:39,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:39,063 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:39,097 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-22 01:52:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:52:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:39,099 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:52:39,099 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:52:39,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:39,101 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:39,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:52:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-22 01:52:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-22 01:52:39,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 16 [2022-11-22 01:52:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-22 01:52:39,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-22 01:52:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:52:39,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:39,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 01:52:39,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash 120358104, now seen corresponding path program 1 times [2022-11-22 01:52:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141727887] [2022-11-22 01:52:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:39,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:39,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141727887] [2022-11-22 01:52:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141727887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359244328] [2022-11-22 01:52:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:39,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:39,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:39,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:39,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:52:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:52:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:39,497 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 14 treesize of output 10 [2022-11-22 01:52:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:39,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:39,674 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 [2022-11-22 01:52:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:39,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:52:39,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359244328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:39,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:52:39,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2022-11-22 01:52:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873582755] [2022-11-22 01:52:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:52:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:52:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:52:39,705 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:39,950 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-22 01:52:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:52:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2022-11-22 01:52:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:39,952 INFO L225 Difference]: With dead ends: 69 [2022-11-22 01:52:39,952 INFO L226 Difference]: Without dead ends: 69 [2022-11-22 01:52:39,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:52:39,953 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:39,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 91 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-22 01:52:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2022-11-22 01:52:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-22 01:52:39,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2022-11-22 01:52:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:39,956 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-22 01:52:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-22 01:52:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:52:39,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:39,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:39,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:40,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:40,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 120323283, now seen corresponding path program 1 times [2022-11-22 01:52:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:40,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515714998] [2022-11-22 01:52:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:40,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:40,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515714998] [2022-11-22 01:52:40,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515714998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149896693] [2022-11-22 01:52:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:40,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:40,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:40,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:40,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:52:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:52:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:40,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:40,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149896693] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:40,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:52:40,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 14 [2022-11-22 01:52:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551596132] [2022-11-22 01:52:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:40,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:40,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:40,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:52:40,784 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:40,820 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-22 01:52:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:52:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2022-11-22 01:52:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:40,822 INFO L225 Difference]: With dead ends: 51 [2022-11-22 01:52:40,822 INFO L226 Difference]: Without dead ends: 47 [2022-11-22 01:52:40,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:52:40,824 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:40,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:52:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-22 01:52:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-11-22 01:52:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 40 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) [2022-11-22 01:52:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-22 01:52:40,827 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 16 [2022-11-22 01:52:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:40,828 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-22 01:52:40,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-22 01:52:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:52:40,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:40,829 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:40,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 01:52:41,042 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1811823780, now seen corresponding path program 1 times [2022-11-22 01:52:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325182878] [2022-11-22 01:52:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:41,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:41,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325182878] [2022-11-22 01:52:41,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325182878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:41,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:41,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:52:41,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881305983] [2022-11-22 01:52:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:41,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:52:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:52:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:52:41,454 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:41,619 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-22 01:52:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:52:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 [2022-11-22 01:52:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:41,620 INFO L225 Difference]: With dead ends: 53 [2022-11-22 01:52:41,620 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 01:52:41,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:52:41,621 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:41,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 01:52:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-22 01:52:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 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) [2022-11-22 01:52:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-22 01:52:41,623 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 16 [2022-11-22 01:52:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:41,623 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-22 01:52:41,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-22 01:52:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:52:41,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:41,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:41,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 01:52:41,625 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash -825270448, now seen corresponding path program 1 times [2022-11-22 01:52:41,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:41,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055605906] [2022-11-22 01:52:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:41,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:41,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055605906] [2022-11-22 01:52:41,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055605906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108487668] [2022-11-22 01:52:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:41,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:41,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:52:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:52:42,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:42,311 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 5 treesize of output 3 [2022-11-22 01:52:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108487668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632518894] [2022-11-22 01:52:42,354 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:52:42,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:42,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:42,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:42,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,421 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 [2022-11-22 01:52:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:52:42,560 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 14 treesize of output 10 [2022-11-22 01:52:42,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:42,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:42,792 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 14 treesize of output 10 [2022-11-22 01:52:42,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:42,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:42,979 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:52:42,979 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 25 treesize of output 24 [2022-11-22 01:52:43,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:43,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:43,248 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:52:43,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:52:43,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:52:43,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:52:43,943 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:52:47,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2780#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:52:47,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:52:47,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:52:47,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-22 01:52:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533933157] [2022-11-22 01:52:47,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:52:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:52:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:52:47,368 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2022-11-22 01:52:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:47,657 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-22 01:52:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:52:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) Word has length 18 [2022-11-22 01:52:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:47,659 INFO L225 Difference]: With dead ends: 53 [2022-11-22 01:52:47,659 INFO L226 Difference]: Without dead ends: 53 [2022-11-22 01:52:47,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:52:47,660 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:47,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 92 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-22 01:52:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-11-22 01:52:47,662 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) [2022-11-22 01:52:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-22 01:52:47,663 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2022-11-22 01:52:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:47,663 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-22 01:52:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2022-11-22 01:52:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-22 01:52:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:52:47,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:47,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:47,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:47,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1537514964, now seen corresponding path program 1 times [2022-11-22 01:52:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:47,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561451621] [2022-11-22 01:52:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:48,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561451621] [2022-11-22 01:52:48,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561451621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137510503] [2022-11-22 01:52:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:48,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:48,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:48,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:52:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:52:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:48,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:48,635 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 5 treesize of output 3 [2022-11-22 01:52:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:48,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137510503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749089748] [2022-11-22 01:52:48,668 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:52:48,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:48,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:48,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:48,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:48,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:48,700 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 [2022-11-22 01:52:48,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:52:48,803 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 14 treesize of output 10 [2022-11-22 01:52:48,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:48,933 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:52:49,000 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:52:49,001 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 25 treesize of output 24 [2022-11-22 01:52:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:49,206 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:52:49,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:52:49,555 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:52:52,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3020#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:52:52,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:52:52,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:52:52,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-22 01:52:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950202037] [2022-11-22 01:52:52,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:52,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:52:52,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:52:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:52:52,872 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-11-22 01:52:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:53,206 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-11-22 01:52:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:52:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) Word has length 18 [2022-11-22 01:52:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:53,207 INFO L225 Difference]: With dead ends: 52 [2022-11-22 01:52:53,207 INFO L226 Difference]: Without dead ends: 52 [2022-11-22 01:52:53,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:52:53,209 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 162 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:53,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 128 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-22 01:52:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-11-22 01:52:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-22 01:52:53,211 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 18 [2022-11-22 01:52:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:53,212 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-22 01:52:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-11-22 01:52:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-22 01:52:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:52:53,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:53,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:53,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 01:52:53,418 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash 186419902, now seen corresponding path program 1 times [2022-11-22 01:52:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:53,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908245802] [2022-11-22 01:52:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:53,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:53,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908245802] [2022-11-22 01:52:53,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908245802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:53,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470176531] [2022-11-22 01:52:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:53,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:53,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:53,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:53,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:52:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:52:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:53,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:54,105 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 5 treesize of output 3 [2022-11-22 01:52:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:52:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470176531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126241350] [2022-11-22 01:52:54,134 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:52:54,134 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:54,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:54,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:54,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:54,170 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 [2022-11-22 01:52:54,238 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 11 treesize of output 7 [2022-11-22 01:52:54,298 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 14 treesize of output 10 [2022-11-22 01:52:54,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:54,426 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 [2022-11-22 01:52:54,504 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 14 treesize of output 10 [2022-11-22 01:52:54,558 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 14 treesize of output 10 [2022-11-22 01:52:54,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:52:54,687 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:52:54,687 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 25 treesize of output 24 [2022-11-22 01:52:54,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:54,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:54,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:54,910 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:52:54,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:52:55,137 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 11 treesize of output 7 [2022-11-22 01:52:55,424 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 11 treesize of output 7 [2022-11-22 01:52:55,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:52:58,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3273#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:52:58,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:52:58,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:52:58,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-22 01:52:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310614116] [2022-11-22 01:52:58,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:52:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:52:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:52:58,861 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 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) [2022-11-22 01:52:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:59,285 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-11-22 01:52:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:52:59,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 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) Word has length 19 [2022-11-22 01:52:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:59,286 INFO L225 Difference]: With dead ends: 74 [2022-11-22 01:52:59,286 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 01:52:59,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:52:59,287 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 269 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:59,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 162 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 01:52:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2022-11-22 01:52:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-22 01:52:59,290 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 19 [2022-11-22 01:52:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:59,290 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-22 01:52:59,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 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) [2022-11-22 01:52:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-22 01:52:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:52:59,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:59,291 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:59,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 01:52:59,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 01:52:59,497 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:52:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1717868928, now seen corresponding path program 2 times [2022-11-22 01:52:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:59,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68334989] [2022-11-22 01:52:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:00,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68334989] [2022-11-22 01:53:00,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68334989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:00,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84247351] [2022-11-22 01:53:00,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:53:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:00,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:00,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:53:00,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:53:00,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:00,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-22 01:53:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:00,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 01:53:00,523 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 [2022-11-22 01:53:00,625 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 24 treesize of output 23 [2022-11-22 01:53:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:00,888 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 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-22 01:53:01,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:01,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 10 [2022-11-22 01:53:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:01,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:01,847 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 74 treesize of output 68 [2022-11-22 01:53:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:03,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84247351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066938752] [2022-11-22 01:53:03,484 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:53:03,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:03,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:03,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:03,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:03,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:03,527 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 [2022-11-22 01:53:03,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:03,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:03,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:03,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:03,812 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:03,812 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 25 treesize of output 24 [2022-11-22 01:53:03,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:03,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:03,999 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:53:03,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:53:04,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:07,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3583#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:07,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:07,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:07,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-11-22 01:53:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267811094] [2022-11-22 01:53:07,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 01:53:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 01:53:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:53:07,999 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:09,955 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-11-22 01:53:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:53:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-22 01:53:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:09,957 INFO L225 Difference]: With dead ends: 112 [2022-11-22 01:53:09,957 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 01:53:09,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=454, Invalid=3452, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 01:53:09,959 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:09,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 288 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:53:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 01:53:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2022-11-22 01:53:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-11-22 01:53:09,962 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2022-11-22 01:53:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:09,962 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-11-22 01:53:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-11-22 01:53:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:53:09,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:09,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:09,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:53:10,174 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1069114481, now seen corresponding path program 2 times [2022-11-22 01:53:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076904143] [2022-11-22 01:53:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:10,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:10,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076904143] [2022-11-22 01:53:10,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076904143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310908435] [2022-11-22 01:53:10,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:53:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:10,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:10,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:53:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:53:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-22 01:53:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:10,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:53:10,674 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 [2022-11-22 01:53:10,915 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 26 treesize of output 26 [2022-11-22 01:53:11,164 INFO L321 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2022-11-22 01:53:11,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 01:53:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:11,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:11,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:11,537 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-22 01:53:11,561 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-22 01:53:11,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-22 01:53:11,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 39 [2022-11-22 01:53:11,597 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 [2022-11-22 01:53:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:12,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310908435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797759161] [2022-11-22 01:53:12,024 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:53:12,024 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:12,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:12,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:12,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:12,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:53:12,112 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 14 treesize of output 10 [2022-11-22 01:53:12,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:12,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:12,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:12,319 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 14 treesize of output 10 [2022-11-22 01:53:12,359 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 14 treesize of output 10 [2022-11-22 01:53:12,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:12,478 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:12,478 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 25 treesize of output 24 [2022-11-22 01:53:12,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:12,705 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:53:12,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:53:12,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:13,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:13,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:16,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3960#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:53:16,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:16,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:16,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-11-22 01:53:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591000520] [2022-11-22 01:53:16,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 01:53:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 01:53:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1499, Unknown=6, NotChecked=0, Total=1640 [2022-11-22 01:53:16,478 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:18,172 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-11-22 01:53:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 01:53:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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) Word has length 23 [2022-11-22 01:53:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:18,173 INFO L225 Difference]: With dead ends: 135 [2022-11-22 01:53:18,173 INFO L226 Difference]: Without dead ends: 131 [2022-11-22 01:53:18,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=440, Invalid=3843, Unknown=7, NotChecked=0, Total=4290 [2022-11-22 01:53:18,175 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:18,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 324 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:53:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-22 01:53:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2022-11-22 01:53:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-11-22 01:53:18,183 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 23 [2022-11-22 01:53:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:18,184 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-11-22 01:53:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-11-22 01:53:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:53:18,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:18,186 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:18,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:18,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:18,392 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash 343299848, now seen corresponding path program 3 times [2022-11-22 01:53:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498992721] [2022-11-22 01:53:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:18,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498992721] [2022-11-22 01:53:18,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498992721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742044798] [2022-11-22 01:53:18,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:53:18,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:18,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:53:18,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:53:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 01:53:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:18,925 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:53:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:53:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:19,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742044798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:19,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744599062] [2022-11-22 01:53:19,376 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:53:19,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:19,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:19,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:19,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:19,429 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 [2022-11-22 01:53:19,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:19,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:19,566 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 14 treesize of output 10 [2022-11-22 01:53:19,631 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 14 treesize of output 10 [2022-11-22 01:53:19,697 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:19,697 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 25 treesize of output 24 [2022-11-22 01:53:19,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:19,895 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:53:19,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:53:20,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:23,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4380#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:23,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:23,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:23,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-22 01:53:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924272586] [2022-11-22 01:53:23,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:23,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:53:23,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:53:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:53:23,293 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:23,971 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-11-22 01:53:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:53:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2022-11-22 01:53:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:23,973 INFO L225 Difference]: With dead ends: 97 [2022-11-22 01:53:23,973 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 01:53:23,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:53:23,974 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 306 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:23,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 253 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:53:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 01:53:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-11-22 01:53:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-11-22 01:53:23,977 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 23 [2022-11-22 01:53:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:23,977 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-11-22 01:53:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-11-22 01:53:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:53:23,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:23,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:24,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-22 01:53:24,186 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1537760653, now seen corresponding path program 1 times [2022-11-22 01:53:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:24,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977258795] [2022-11-22 01:53:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:24,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977258795] [2022-11-22 01:53:24,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977258795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310274264] [2022-11-22 01:53:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:24,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:24,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:24,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:53:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-22 01:53:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:24,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:53:25,096 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 13 treesize of output 9 [2022-11-22 01:53:25,211 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 14 treesize of output 16 [2022-11-22 01:53:25,281 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 [2022-11-22 01:53:25,308 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 [2022-11-22 01:53:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:25,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:25,356 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_512 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-11-22 01:53:25,379 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_512 (Array Int Int)) (v_ArrVal_511 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_511) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-11-22 01:53:25,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:25,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:53:25,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:25,494 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 [2022-11-22 01:53:25,507 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 [2022-11-22 01:53:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-22 01:53:25,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310274264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630152065] [2022-11-22 01:53:25,720 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:53:25,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:25,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:25,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:25,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:25,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:25,768 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 [2022-11-22 01:53:25,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:25,856 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 14 treesize of output 10 [2022-11-22 01:53:25,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:25,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:26,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:26,061 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 14 treesize of output 10 [2022-11-22 01:53:26,112 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 14 treesize of output 10 [2022-11-22 01:53:26,176 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:26,176 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 25 treesize of output 24 [2022-11-22 01:53:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,375 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:53:26,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:53:26,575 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 11 treesize of output 7 [2022-11-22 01:53:26,835 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 11 treesize of output 7 [2022-11-22 01:53:27,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:27,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:32,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4769#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |#NULL.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:53:32,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:32,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:32,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-11-22 01:53:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081450639] [2022-11-22 01:53:32,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 01:53:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 01:53:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1619, Unknown=2, NotChecked=166, Total=1980 [2022-11-22 01:53:32,993 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2022-11-22 01:53:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:33,646 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2022-11-22 01:53:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:53:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 25 [2022-11-22 01:53:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:33,648 INFO L225 Difference]: With dead ends: 93 [2022-11-22 01:53:33,648 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 01:53:33,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=295, Invalid=2161, Unknown=2, NotChecked=194, Total=2652 [2022-11-22 01:53:33,649 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:33,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 293 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-22 01:53:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 01:53:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-22 01:53:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 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) [2022-11-22 01:53:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-11-22 01:53:33,652 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 25 [2022-11-22 01:53:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:33,653 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-11-22 01:53:33,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2022-11-22 01:53:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-11-22 01:53:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 01:53:33,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:33,654 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:33,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-22 01:53:33,861 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 928690380, now seen corresponding path program 4 times [2022-11-22 01:53:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537079264] [2022-11-22 01:53:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:34,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537079264] [2022-11-22 01:53:34,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537079264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130127132] [2022-11-22 01:53:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:53:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:34,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:34,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:53:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 01:53:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:34,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 01:53:34,721 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 [2022-11-22 01:53:34,832 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 [2022-11-22 01:53:34,930 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 [2022-11-22 01:53:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:34,990 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_546 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_546) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-11-22 01:53:35,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:35,017 INFO L350 Elim1Store]: Elim1 eliminated variable 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 23 treesize of output 24 [2022-11-22 01:53:35,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:35,027 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 [2022-11-22 01:53:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130127132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310100621] [2022-11-22 01:53:35,212 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:53:35,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:35,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:35,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:35,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:35,242 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 [2022-11-22 01:53:35,298 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 11 treesize of output 7 [2022-11-22 01:53:35,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:35,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:35,550 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:35,550 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 25 treesize of output 24 [2022-11-22 01:53:35,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:35,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:35,752 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:53:35,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:53:36,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:39,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5143#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:39,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:39,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:39,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-11-22 01:53:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661188024] [2022-11-22 01:53:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:39,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:53:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:53:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1066, Unknown=1, NotChecked=66, Total=1260 [2022-11-22 01:53:39,121 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2022-11-22 01:53:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:39,651 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2022-11-22 01:53:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:53:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 26 [2022-11-22 01:53:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:39,653 INFO L225 Difference]: With dead ends: 149 [2022-11-22 01:53:39,653 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 01:53:39,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=230, Invalid=1752, Unknown=2, NotChecked=86, Total=2070 [2022-11-22 01:53:39,654 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 8 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:39,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 216 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 11 Unknown, 40 Unchecked, 0.2s Time] [2022-11-22 01:53:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 01:53:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2022-11-22 01:53:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 84 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-11-22 01:53:39,658 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 26 [2022-11-22 01:53:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:39,658 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-11-22 01:53:39,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2022-11-22 01:53:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-11-22 01:53:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:53:39,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:39,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:39,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 01:53:39,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:39,866 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 221963549, now seen corresponding path program 3 times [2022-11-22 01:53:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110129732] [2022-11-22 01:53:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:40,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110129732] [2022-11-22 01:53:40,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110129732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743836248] [2022-11-22 01:53:40,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:53:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:40,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:40,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:53:40,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:53:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 01:53:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:40,383 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:53:40,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:53:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:40,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743836248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351678452] [2022-11-22 01:53:40,854 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:53:40,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:40,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:40,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:40,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:40,879 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 [2022-11-22 01:53:40,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:40,982 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 [2022-11-22 01:53:41,018 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 14 treesize of output 10 [2022-11-22 01:53:41,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:41,137 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 14 treesize of output 10 [2022-11-22 01:53:41,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:41,229 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 14 treesize of output 10 [2022-11-22 01:53:41,296 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:41,297 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 25 treesize of output 24 [2022-11-22 01:53:41,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:41,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:41,444 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:53:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:53:41,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:41,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:41,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:44,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5585#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:44,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:44,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:44,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-11-22 01:53:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435802228] [2022-11-22 01:53:44,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:53:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:53:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:53:44,880 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:45,223 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-11-22 01:53:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:53:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 01:53:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:45,225 INFO L225 Difference]: With dead ends: 90 [2022-11-22 01:53:45,225 INFO L226 Difference]: Without dead ends: 90 [2022-11-22 01:53:45,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:53:45,226 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 283 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:45,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 134 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:53:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-22 01:53:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-11-22 01:53:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-11-22 01:53:45,229 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 27 [2022-11-22 01:53:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:45,229 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-11-22 01:53:45,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-11-22 01:53:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:53:45,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:45,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:45,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 01:53:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:45,434 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:45,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1709064559, now seen corresponding path program 2 times [2022-11-22 01:53:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:45,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763633516] [2022-11-22 01:53:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:45,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763633516] [2022-11-22 01:53:45,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763633516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855337965] [2022-11-22 01:53:45,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:53:45,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:45,747 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:53:46,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:53:46,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 01:53:46,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:46,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:46,463 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 5 [2022-11-22 01:53:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855337965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614240481] [2022-11-22 01:53:46,503 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:53:46,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:46,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:46,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:46,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:46,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:46,540 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 [2022-11-22 01:53:46,573 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 11 treesize of output 7 [2022-11-22 01:53:46,618 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 [2022-11-22 01:53:46,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:46,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:46,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:46,798 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 [2022-11-22 01:53:46,852 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 [2022-11-22 01:53:46,913 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:46,913 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 25 treesize of output 24 [2022-11-22 01:53:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:47,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:47,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:47,082 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:53:47,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:53:47,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:53:47,366 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 [2022-11-22 01:53:47,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:50,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5979#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:50,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:50,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:50,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-11-22 01:53:50,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360565190] [2022-11-22 01:53:50,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 01:53:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 01:53:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:53:50,109 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 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) [2022-11-22 01:53:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:50,901 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-11-22 01:53:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:53:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 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 28 [2022-11-22 01:53:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:50,902 INFO L225 Difference]: With dead ends: 134 [2022-11-22 01:53:50,902 INFO L226 Difference]: Without dead ends: 134 [2022-11-22 01:53:50,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:53:50,904 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 211 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:50,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 465 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:53:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-22 01:53:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 87. [2022-11-22 01:53:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.180722891566265) internal successors, (98), 86 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-11-22 01:53:50,907 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 28 [2022-11-22 01:53:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:50,907 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-11-22 01:53:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 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) [2022-11-22 01:53:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-11-22 01:53:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:53:50,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:50,908 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:50,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:51,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-22 01:53:51,115 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -404171452, now seen corresponding path program 5 times [2022-11-22 01:53:51,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702418379] [2022-11-22 01:53:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:51,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:51,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702418379] [2022-11-22 01:53:51,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702418379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201597587] [2022-11-22 01:53:51,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:53:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:51,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:51,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:51,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:53:51,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:53:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 01:53:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:51,673 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:53:51,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:53:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:51,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201597587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15912735] [2022-11-22 01:53:52,308 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:53:52,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:52,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:52,309 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:52,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:52,330 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 [2022-11-22 01:53:52,371 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 14 treesize of output 10 [2022-11-22 01:53:52,415 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 [2022-11-22 01:53:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:52,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:53:52,550 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:53:52,551 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 25 treesize of output 24 [2022-11-22 01:53:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:52,727 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:53:52,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:53:53,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:56,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6433#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:53:56,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:56,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:53:56,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-22 01:53:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661783050] [2022-11-22 01:53:56,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:56,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:53:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:53:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:53:56,133 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) [2022-11-22 01:53:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:57,012 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-11-22 01:53:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:53:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) Word has length 28 [2022-11-22 01:53:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:57,013 INFO L225 Difference]: With dead ends: 146 [2022-11-22 01:53:57,013 INFO L226 Difference]: Without dead ends: 146 [2022-11-22 01:53:57,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 01:53:57,015 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 378 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:57,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 326 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:53:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-22 01:53:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2022-11-22 01:53:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 120 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:53:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-11-22 01:53:57,026 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 28 [2022-11-22 01:53:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:57,026 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-11-22 01:53:57,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) [2022-11-22 01:53:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-11-22 01:53:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 01:53:57,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:57,028 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:57,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:57,229 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:53:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 326518431, now seen corresponding path program 2 times [2022-11-22 01:53:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867020005] [2022-11-22 01:53:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:58,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867020005] [2022-11-22 01:53:58,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867020005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463620580] [2022-11-22 01:53:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:53:58,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:58,791 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:58,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:53:58,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:53:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 01:53:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:58,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:53:59,189 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 [2022-11-22 01:53:59,346 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 [2022-11-22 01:53:59,459 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 [2022-11-22 01:53:59,510 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 [2022-11-22 01:53:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:59,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:59,609 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array Int Int)) (v_ArrVal_710 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_710) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))) is different from false [2022-11-22 01:53:59,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:59,684 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:53:59,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:53:59,690 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 [2022-11-22 01:53:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:53:59,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463620580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191471243] [2022-11-22 01:53:59,895 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:53:59,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:59,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:59,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:59,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:59,931 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 [2022-11-22 01:53:59,965 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 [2022-11-22 01:54:00,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:00,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:00,106 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 11 treesize of output 7 [2022-11-22 01:54:00,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:00,183 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 14 treesize of output 10 [2022-11-22 01:54:00,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:00,285 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:54:00,286 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 25 treesize of output 24 [2022-11-22 01:54:00,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:00,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:00,456 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:54:00,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:54:00,580 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 11 treesize of output 7 [2022-11-22 01:54:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:00,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:01,131 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:06,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6942#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:54:06,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:54:06,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:06,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 32 [2022-11-22 01:54:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970042046] [2022-11-22 01:54:06,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 01:54:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 01:54:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2248, Unknown=17, NotChecked=96, Total=2550 [2022-11-22 01:54:06,699 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-11-22 01:54:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:09,253 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2022-11-22 01:54:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:54:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 30 [2022-11-22 01:54:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:09,254 INFO L225 Difference]: With dead ends: 141 [2022-11-22 01:54:09,254 INFO L226 Difference]: Without dead ends: 113 [2022-11-22 01:54:09,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=465, Invalid=4488, Unknown=21, NotChecked=138, Total=5112 [2022-11-22 01:54:09,259 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 22 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:09,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 312 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 540 Invalid, 7 Unknown, 54 Unchecked, 0.5s Time] [2022-11-22 01:54:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-22 01:54:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-22 01:54:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.158878504672897) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2022-11-22 01:54:09,268 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 30 [2022-11-22 01:54:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:09,268 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2022-11-22 01:54:09,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-11-22 01:54:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2022-11-22 01:54:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 01:54:09,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:09,270 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:09,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:09,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 01:54:09,481 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:54:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1878345456, now seen corresponding path program 6 times [2022-11-22 01:54:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:09,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880131935] [2022-11-22 01:54:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:09,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:54:10,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880131935] [2022-11-22 01:54:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880131935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865842771] [2022-11-22 01:54:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:54:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:10,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:10,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:54:10,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:54:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:54:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-22 01:54:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:10,350 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:54:10,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:54:10,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:54:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:10,625 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 21 treesize of output 20 [2022-11-22 01:54:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:11,211 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-22 01:54:11,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 26 [2022-11-22 01:54:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:54:11,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:12,136 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 29 treesize of output 25 [2022-11-22 01:54:12,142 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 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-22 01:54:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:54:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865842771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853345172] [2022-11-22 01:54:12,618 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:54:12,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:54:12,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:54:12,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:54:12,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:54:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:12,653 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 [2022-11-22 01:54:12,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:12,729 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 14 treesize of output 10 [2022-11-22 01:54:12,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:12,803 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 14 treesize of output 10 [2022-11-22 01:54:12,860 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:54:12,860 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 25 treesize of output 24 [2022-11-22 01:54:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:13,008 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:54:13,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:54:13,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:17,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7481#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:54:17,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:54:17,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:17,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 45 [2022-11-22 01:54:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558244493] [2022-11-22 01:54:17,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 01:54:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 01:54:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2917, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 01:54:17,341 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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) [2022-11-22 01:54:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:20,888 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2022-11-22 01:54:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 01:54:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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 [2022-11-22 01:54:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:20,890 INFO L225 Difference]: With dead ends: 230 [2022-11-22 01:54:20,890 INFO L226 Difference]: Without dead ends: 210 [2022-11-22 01:54:20,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1072, Invalid=8048, Unknown=0, NotChecked=0, Total=9120 [2022-11-22 01:54:20,893 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 950 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:20,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 552 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:54:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-22 01:54:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 126. [2022-11-22 01:54:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 125 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) [2022-11-22 01:54:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2022-11-22 01:54:20,897 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 31 [2022-11-22 01:54:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:20,898 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2022-11-22 01:54:20,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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) [2022-11-22 01:54:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2022-11-22 01:54:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:54:20,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:20,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:20,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:21,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-22 01:54:21,104 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:54:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash 521645538, now seen corresponding path program 4 times [2022-11-22 01:54:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:21,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635896911] [2022-11-22 01:54:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:21,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:54:21,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635896911] [2022-11-22 01:54:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635896911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127862667] [2022-11-22 01:54:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:54:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:21,344 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:21,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:54:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-22 01:54:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:54:21,663 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 [2022-11-22 01:54:21,784 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 [2022-11-22 01:54:21,914 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 [2022-11-22 01:54:22,019 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 01:54:22,019 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 [2022-11-22 01:54:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:54:22,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:22,157 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-22 01:54:22,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:22,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:54:22,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:22,301 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 [2022-11-22 01:54:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 6 not checked. [2022-11-22 01:54:22,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127862667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341011142] [2022-11-22 01:54:22,480 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:54:22,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:54:22,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:54:22,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:54:22,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:54:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:22,511 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 [2022-11-22 01:54:22,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:22,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:22,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:22,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:22,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:22,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:54:22,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:22,849 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:54:22,849 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 25 treesize of output 24 [2022-11-22 01:54:22,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:22,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:22,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:23,024 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:54:23,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:54:23,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:23,280 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 11 treesize of output 7 [2022-11-22 01:54:23,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:26,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8143#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:54:26,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:54:26,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:26,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-11-22 01:54:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628347559] [2022-11-22 01:54:26,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:54:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:54:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1637, Unknown=35, NotChecked=82, Total=1892 [2022-11-22 01:54:26,540 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:28,408 INFO L93 Difference]: Finished difference Result 236 states and 254 transitions. [2022-11-22 01:54:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-22 01:54:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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 32 [2022-11-22 01:54:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:28,416 INFO L225 Difference]: With dead ends: 236 [2022-11-22 01:54:28,416 INFO L226 Difference]: Without dead ends: 231 [2022-11-22 01:54:28,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=457, Invalid=4622, Unknown=37, NotChecked=140, Total=5256 [2022-11-22 01:54:28,417 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 321 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:28,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 629 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 854 Invalid, 0 Unknown, 100 Unchecked, 0.6s Time] [2022-11-22 01:54:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-22 01:54:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 143. [2022-11-22 01:54:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 142 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) [2022-11-22 01:54:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2022-11-22 01:54:28,426 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 32 [2022-11-22 01:54:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:28,426 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2022-11-22 01:54:28,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2022-11-22 01:54:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:54:28,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:28,427 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:28,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:28,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-22 01:54:28,634 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:54:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1249781536, now seen corresponding path program 3 times [2022-11-22 01:54:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256749727] [2022-11-22 01:54:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:54:29,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256749727] [2022-11-22 01:54:29,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256749727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571638777] [2022-11-22 01:54:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:54:29,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:29,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:29,762 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:54:29,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:54:29,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:54:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-22 01:54:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:30,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:54:30,328 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:54:30,328 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 16 treesize of output 22 [2022-11-22 01:54:30,337 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 [2022-11-22 01:54:30,544 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:54:30,545 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 27 treesize of output 33 [2022-11-22 01:54:30,729 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:54:30,729 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 32 treesize of output 39 [2022-11-22 01:54:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:30,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:30,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-22 01:54:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:54:30,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:35,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:35,050 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 01:54:35,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:35,497 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:54:35,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:35,505 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 [2022-11-22 01:54:35,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:35,512 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 20 treesize of output 20 [2022-11-22 01:54:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:54:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571638777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180797324] [2022-11-22 01:54:35,964 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:54:35,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:54:35,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:54:35,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:54:35,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:54:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:35,996 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 [2022-11-22 01:54:36,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:36,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:36,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:36,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:36,229 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 14 treesize of output 10 [2022-11-22 01:54:36,263 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 14 treesize of output 10 [2022-11-22 01:54:36,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:36,367 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:54:36,367 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 25 treesize of output 24 [2022-11-22 01:54:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:36,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:36,561 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:54:36,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:54:36,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:36,892 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 11 treesize of output 7 [2022-11-22 01:54:37,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:37,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:44,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8836#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:54:44,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:54:44,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:44,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 42 [2022-11-22 01:54:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116971646] [2022-11-22 01:54:44,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 01:54:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 01:54:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3401, Unknown=17, NotChecked=0, Total=3660 [2022-11-22 01:54:44,346 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:47,340 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2022-11-22 01:54:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:54:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-22 01:54:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:47,342 INFO L225 Difference]: With dead ends: 170 [2022-11-22 01:54:47,342 INFO L226 Difference]: Without dead ends: 120 [2022-11-22 01:54:47,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=627, Invalid=6666, Unknown=17, NotChecked=0, Total=7310 [2022-11-22 01:54:47,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:47,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 496 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:54:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-22 01:54:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-22 01:54:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2022-11-22 01:54:47,347 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 34 [2022-11-22 01:54:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:47,347 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2022-11-22 01:54:47,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2022-11-22 01:54:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:54:47,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:47,348 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:47,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-22 01:54:47,555 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:54:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1618176605, now seen corresponding path program 4 times [2022-11-22 01:54:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43160993] [2022-11-22 01:54:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:54:48,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43160993] [2022-11-22 01:54:48,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43160993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446646496] [2022-11-22 01:54:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:54:48,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:48,300 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:48,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:54:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-22 01:54:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:48,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 01:54:48,723 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 [2022-11-22 01:54:48,978 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 [2022-11-22 01:54:49,158 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 [2022-11-22 01:54:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:49,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:49,518 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 [2022-11-22 01:54:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:54:49,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:49,544 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-11-22 01:54:49,564 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int)) (v_ArrVal_901 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_901) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2022-11-22 01:54:49,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:49,768 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:54:49,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:54:49,778 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 [2022-11-22 01:54:49,783 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 [2022-11-22 01:54:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-22 01:54:50,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446646496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:50,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11219487] [2022-11-22 01:54:50,375 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:54:50,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:54:50,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:54:50,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:54:50,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:54:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:50,406 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 [2022-11-22 01:54:50,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:54:50,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:54:50,757 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:54:50,757 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 25 treesize of output 24 [2022-11-22 01:54:50,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:50,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:50,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:50,915 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:54:50,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:54:51,038 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 [2022-11-22 01:54:51,186 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 11 treesize of output 7 [2022-11-22 01:54:51,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:54:51,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:57,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9440#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:54:57,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:54:57,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:57,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-11-22 01:54:57,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912006005] [2022-11-22 01:54:57,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:58,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:54:58,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:54:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3072, Unknown=2, NotChecked=226, Total=3540 [2022-11-22 01:54:58,001 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 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) [2022-11-22 01:54:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:59,393 INFO L93 Difference]: Finished difference Result 199 states and 218 transitions. [2022-11-22 01:54:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:54:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 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 35 [2022-11-22 01:54:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:59,395 INFO L225 Difference]: With dead ends: 199 [2022-11-22 01:54:59,396 INFO L226 Difference]: Without dead ends: 177 [2022-11-22 01:54:59,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=405, Invalid=4571, Unknown=2, NotChecked=278, Total=5256 [2022-11-22 01:54:59,397 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 196 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:59,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 401 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 514 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-11-22 01:54:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-22 01:54:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 125. [2022-11-22 01:54:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-11-22 01:54:59,401 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 35 [2022-11-22 01:54:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:59,402 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-11-22 01:54:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 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) [2022-11-22 01:54:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-11-22 01:54:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:54:59,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:59,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:59,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:59,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:59,609 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:54:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:59,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1826804588, now seen corresponding path program 5 times [2022-11-22 01:54:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:59,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513818181] [2022-11-22 01:54:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:59,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:00,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513818181] [2022-11-22 01:55:00,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513818181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695126218] [2022-11-22 01:55:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:55:00,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:00,151 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:00,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:55:00,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:55:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-22 01:55:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:00,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:01,055 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 5 [2022-11-22 01:55:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:01,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695126218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:01,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990799346] [2022-11-22 01:55:01,148 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:55:01,148 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:01,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:01,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:01,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:01,174 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 [2022-11-22 01:55:01,210 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 14 treesize of output 10 [2022-11-22 01:55:01,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:01,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:01,319 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 [2022-11-22 01:55:01,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:01,392 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 14 treesize of output 10 [2022-11-22 01:55:01,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:01,507 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:55:01,507 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 25 treesize of output 24 [2022-11-22 01:55:01,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:01,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:01,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:01,672 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:55:01,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:55:01,797 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:01,956 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 11 treesize of output 7 [2022-11-22 01:55:02,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:55:05,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10048#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:55:05,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:55:05,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:55:05,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-11-22 01:55:05,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956530056] [2022-11-22 01:55:05,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 01:55:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 01:55:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:55:05,430 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 28 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 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) [2022-11-22 01:55:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:06,207 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2022-11-22 01:55:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:55:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 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) Word has length 36 [2022-11-22 01:55:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:06,209 INFO L225 Difference]: With dead ends: 137 [2022-11-22 01:55:06,209 INFO L226 Difference]: Without dead ends: 137 [2022-11-22 01:55:06,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:55:06,210 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 586 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:06,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 224 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:55:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-22 01:55:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 126. [2022-11-22 01:55:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 125 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2022-11-22 01:55:06,214 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 36 [2022-11-22 01:55:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:06,214 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2022-11-22 01:55:06,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 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) [2022-11-22 01:55:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2022-11-22 01:55:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:55:06,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:06,215 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:06,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-22 01:55:06,422 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:55:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1307255236, now seen corresponding path program 7 times [2022-11-22 01:55:06,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539589848] [2022-11-22 01:55:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:07,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539589848] [2022-11-22 01:55:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539589848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650520243] [2022-11-22 01:55:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:55:07,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:07,232 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:07,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:55:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-22 01:55:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:07,684 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 13 treesize of output 9 [2022-11-22 01:55:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:07,828 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 21 treesize of output 20 [2022-11-22 01:55:08,122 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 [2022-11-22 01:55:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:08,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:08,334 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 67 treesize of output 61 [2022-11-22 01:55:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:08,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650520243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785194401] [2022-11-22 01:55:08,817 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:55:08,818 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:08,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:08,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:08,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:08,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:08,851 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 [2022-11-22 01:55:08,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:08,919 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 14 treesize of output 10 [2022-11-22 01:55:08,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:08,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:55:09,039 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:55:09,039 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 25 treesize of output 24 [2022-11-22 01:55:09,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:09,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:09,195 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:55:09,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:55:09,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:55:13,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10596#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:55:13,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:55:13,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:55:13,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-11-22 01:55:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569056045] [2022-11-22 01:55:13,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:55:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:55:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:55:13,506 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:15,196 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2022-11-22 01:55:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:55:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-11-22 01:55:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:15,198 INFO L225 Difference]: With dead ends: 289 [2022-11-22 01:55:15,198 INFO L226 Difference]: Without dead ends: 266 [2022-11-22 01:55:15,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 01:55:15,202 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 258 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:15,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 767 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:55:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-22 01:55:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 140. [2022-11-22 01:55:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.161764705882353) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-11-22 01:55:15,208 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 36 [2022-11-22 01:55:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:15,209 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-11-22 01:55:15,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-11-22 01:55:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:55:15,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:15,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:15,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-22 01:55:15,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:55:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -796367366, now seen corresponding path program 3 times [2022-11-22 01:55:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:15,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907970778] [2022-11-22 01:55:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:15,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907970778] [2022-11-22 01:55:15,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907970778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553429368] [2022-11-22 01:55:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:55:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:15,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:15,861 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:55:16,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:55:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:16,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 01:55:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:16,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-22 01:55:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:55:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553429368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045422791] [2022-11-22 01:55:16,813 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:55:16,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:16,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:16,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:16,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:16,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:16,853 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 [2022-11-22 01:55:16,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:16,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:16,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:17,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:17,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:17,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:17,162 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 14 treesize of output 10 [2022-11-22 01:55:17,223 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:55:17,223 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 25 treesize of output 24 [2022-11-22 01:55:17,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:17,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:17,375 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:55:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:55:17,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:17,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:17,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:55:22,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11320#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:55:22,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:55:22,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:55:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-11-22 01:55:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502417216] [2022-11-22 01:55:22,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:22,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:55:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:55:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1711, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:55:22,110 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) [2022-11-22 01:55:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:23,063 INFO L93 Difference]: Finished difference Result 221 states and 238 transitions. [2022-11-22 01:55:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:55:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) Word has length 37 [2022-11-22 01:55:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:23,065 INFO L225 Difference]: With dead ends: 221 [2022-11-22 01:55:23,065 INFO L226 Difference]: Without dead ends: 221 [2022-11-22 01:55:23,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=648, Invalid=3134, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:55:23,066 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 454 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:23,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 477 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:55:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-22 01:55:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 141. [2022-11-22 01:55:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 140 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2022-11-22 01:55:23,071 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 37 [2022-11-22 01:55:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:23,072 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2022-11-22 01:55:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 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) [2022-11-22 01:55:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2022-11-22 01:55:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:55:23,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:23,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:23,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:23,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:23,278 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:55:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1174064357, now seen corresponding path program 5 times [2022-11-22 01:55:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:23,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610182881] [2022-11-22 01:55:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:23,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:55:23,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610182881] [2022-11-22 01:55:23,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610182881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482278929] [2022-11-22 01:55:23,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:55:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:23,814 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:55:23,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:55:23,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-22 01:55:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:24,195 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 13 treesize of output 9 [2022-11-22 01:55:24,372 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:55:24,373 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 16 treesize of output 22 [2022-11-22 01:55:24,380 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 [2022-11-22 01:55:24,591 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:55:24,591 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 40 treesize of output 47 [2022-11-22 01:55:25,388 INFO L321 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-11-22 01:55:25,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 42 treesize of output 54 [2022-11-22 01:55:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:55:25,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:27,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:55:27,342 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2022-11-22 01:55:27,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:55:27,784 INFO L350 Elim1Store]: Elim1 eliminated variable 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 70 treesize of output 48 [2022-11-22 01:55:27,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:55:27,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 108 [2022-11-22 01:55:27,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:55:27,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:55:27,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 74 [2022-11-22 01:55:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:55:29,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482278929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:29,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471055050] [2022-11-22 01:55:29,262 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:55:29,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:29,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:29,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:29,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:29,308 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 [2022-11-22 01:55:29,341 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 11 treesize of output 7 [2022-11-22 01:55:29,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:29,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:29,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:29,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:29,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:29,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:29,663 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:55:29,664 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 25 treesize of output 24 [2022-11-22 01:55:29,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:29,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:29,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:29,835 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:55:29,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:55:29,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:30,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:30,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:55:30,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:55:38,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11995#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:55:38,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:55:38,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:55:38,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 48 [2022-11-22 01:55:38,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987683356] [2022-11-22 01:55:38,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:38,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 01:55:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 01:55:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=4132, Unknown=11, NotChecked=0, Total=4556 [2022-11-22 01:55:38,186 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:46,688 INFO L93 Difference]: Finished difference Result 227 states and 248 transitions. [2022-11-22 01:55:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:55:46,689 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 01:55:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:46,690 INFO L225 Difference]: With dead ends: 227 [2022-11-22 01:55:46,690 INFO L226 Difference]: Without dead ends: 227 [2022-11-22 01:55:46,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1713, Invalid=11386, Unknown=11, NotChecked=0, Total=13110 [2022-11-22 01:55:46,692 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 512 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:46,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 755 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 01:55:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-22 01:55:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 180. [2022-11-22 01:55:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.1420454545454546) internal successors, (201), 179 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2022-11-22 01:55:46,698 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 37 [2022-11-22 01:55:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:46,698 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2022-11-22 01:55:46,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2022-11-22 01:55:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:55:46,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:46,699 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:46,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:46,906 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:55:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2105134260, now seen corresponding path program 8 times [2022-11-22 01:55:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:46,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146571320] [2022-11-22 01:55:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:46,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:47,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:47,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146571320] [2022-11-22 01:55:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146571320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091901328] [2022-11-22 01:55:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:55:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:47,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:47,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 01:55:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:55:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 01:55:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:48,559 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 5 [2022-11-22 01:55:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:48,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091901328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:48,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829747880] [2022-11-22 01:55:48,700 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:55:48,700 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:48,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:48,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:48,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:48,727 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 [2022-11-22 01:55:48,766 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 11 treesize of output 7 [2022-11-22 01:55:48,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:48,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:48,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:55:48,976 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:55:48,977 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 25 treesize of output 24 [2022-11-22 01:55:49,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:49,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:55:49,134 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 01:55:49,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 01:55:49,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:55:53,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12774#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:55:53,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:55:53,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:55:53,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-11-22 01:55:53,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148147513] [2022-11-22 01:55:53,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 01:55:53,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 01:55:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 01:55:53,109 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:54,725 INFO L93 Difference]: Finished difference Result 322 states and 350 transitions. [2022-11-22 01:55:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:55:54,726 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 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 [2022-11-22 01:55:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:54,728 INFO L225 Difference]: With dead ends: 322 [2022-11-22 01:55:54,728 INFO L226 Difference]: Without dead ends: 322 [2022-11-22 01:55:54,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 01:55:54,729 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 549 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:54,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 496 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:55:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-22 01:55:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 218. [2022-11-22 01:55:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 217 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 246 transitions. [2022-11-22 01:55:54,735 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 246 transitions. Word has length 38 [2022-11-22 01:55:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:54,735 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 246 transitions. [2022-11-22 01:55:54,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 246 transitions. [2022-11-22 01:55:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:55:54,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:54,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:54,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:54,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-22 01:55:54,943 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:55:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1875159612, now seen corresponding path program 6 times [2022-11-22 01:55:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:54,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107289106] [2022-11-22 01:55:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:54,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:57,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107289106] [2022-11-22 01:55:57,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107289106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179140923] [2022-11-22 01:55:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:55:57,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:57,999 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 01:55:58,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:55:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:58,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-22 01:55:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:58,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:55:58,933 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:55:58,933 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 16 treesize of output 22 [2022-11-22 01:55:58,942 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 7 treesize of output 3 [2022-11-22 01:55:59,251 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:55:59,251 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 27 treesize of output 33 [2022-11-22 01:55:59,486 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:55:59,487 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 32 treesize of output 35 [2022-11-22 01:56:00,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:00,170 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-22 01:56:00,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-11-22 01:56:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:56:00,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:01,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:56:01,036 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2022-11-22 01:56:01,448 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_11 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_130| Int)) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_130| v_arrayElimArr_11) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (not (= (select v_arrayElimArr_11 (+ 2 |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset|)) 0)) (= (select .cse0 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)))) is different from false [2022-11-22 01:56:01,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:56:01,478 INFO L350 Elim1Store]: Elim1 eliminated variable 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 47 treesize of output 36 [2022-11-22 01:56:01,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:56:01,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2022-11-22 01:56:01,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:56:01,513 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 31 treesize of output 37 [2022-11-22 01:56:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 12 refuted. 2 times theorem prover too weak. 4 trivial. 4 not checked. [2022-11-22 01:56:02,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179140923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:02,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146311661] [2022-11-22 01:56:02,363 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:56:02,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:02,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:02,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:02,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:02,412 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 [2022-11-22 01:56:02,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:56:02,499 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 14 treesize of output 10 [2022-11-22 01:56:02,522 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 14 treesize of output 10 [2022-11-22 01:56:02,571 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 [2022-11-22 01:56:02,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:56:02,651 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 14 treesize of output 10 [2022-11-22 01:56:02,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:56:02,759 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:56:02,759 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 25 treesize of output 24 [2022-11-22 01:56:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:02,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:02,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:02,925 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 01:56:02,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:56:03,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:56:03,263 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 11 treesize of output 7 [2022-11-22 01:56:03,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:56:03,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:12,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13649#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |#NULL.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 01:56:12,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:56:12,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:56:12,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 59 [2022-11-22 01:56:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381002761] [2022-11-22 01:56:12,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-22 01:56:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-22 01:56:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5417, Unknown=16, NotChecked=148, Total=5852 [2022-11-22 01:56:12,507 INFO L87 Difference]: Start difference. First operand 218 states and 246 transitions. Second operand has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:35,337 INFO L93 Difference]: Finished difference Result 331 states and 358 transitions. [2022-11-22 01:56:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-22 01:56:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2022-11-22 01:56:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:35,339 INFO L225 Difference]: With dead ends: 331 [2022-11-22 01:56:35,339 INFO L226 Difference]: Without dead ends: 306 [2022-11-22 01:56:35,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=1237, Invalid=14501, Unknown=16, NotChecked=248, Total=16002 [2022-11-22 01:56:35,341 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 692 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 68 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:35,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 724 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1633 Invalid, 21 Unknown, 114 Unchecked, 2.4s Time] [2022-11-22 01:56:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-22 01:56:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 208. [2022-11-22 01:56:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.1470588235294117) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-11-22 01:56:35,348 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 39 [2022-11-22 01:56:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:35,349 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-11-22 01:56:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-11-22 01:56:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 01:56:35,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:35,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:35,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:35,557 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 01:56:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -375752501, now seen corresponding path program 6 times [2022-11-22 01:56:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328364404] [2022-11-22 01:56:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:56:35,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328364404] [2022-11-22 01:56:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328364404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:56:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586431805] [2022-11-22 01:56:35,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:56:35,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:35,959 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:35,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 01:56:36,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:56:36,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-22 01:56:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:36,933 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:56:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:37,021 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 01:56:37,021 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 22 [2022-11-22 01:56:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:37,312 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:56:37,312 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:56:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:37,606 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:56:37,606 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:56:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:37,890 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:56:37,891 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:56:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:38,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:56:38,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-22 01:56:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:56:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:39,087 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 3126 treesize of output 3102 [2022-11-22 02:04:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:04:58,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586431805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:04:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737546693] [2022-11-22 02:04:58,556 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 02:04:58,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:04:58,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:04:58,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:04:58,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:04:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:04:58,585 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 [2022-11-22 02:04:58,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:04:58,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:04:58,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:04:58,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:04:58,805 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 14 treesize of output 10 [2022-11-22 02:04:58,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:04:58,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:04:58,947 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 02:04:58,948 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 25 treesize of output 24 [2022-11-22 02:04:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:04:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:04:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:04:59,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:04:59,124 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 02:04:59,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 02:04:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:04:59,396 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 [2022-11-22 02:04:59,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:05:03,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14599#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:05:03,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:05:03,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:05:03,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 22] total 54 [2022-11-22 02:05:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372955482] [2022-11-22 02:05:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-22 02:05:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:05:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-22 02:05:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4153, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 02:05:03,880 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:10,741 INFO L93 Difference]: Finished difference Result 381 states and 408 transitions. [2022-11-22 02:05:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-22 02:05:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 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 41 [2022-11-22 02:05:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:10,743 INFO L225 Difference]: With dead ends: 381 [2022-11-22 02:05:10,743 INFO L226 Difference]: Without dead ends: 374 [2022-11-22 02:05:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=959, Invalid=10597, Unknown=0, NotChecked=0, Total=11556 [2022-11-22 02:05:10,745 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 531 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:10,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1826 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 02:05:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-22 02:05:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 238. [2022-11-22 02:05:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.1324786324786325) internal successors, (265), 237 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 265 transitions. [2022-11-22 02:05:10,751 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 265 transitions. Word has length 41 [2022-11-22 02:05:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:10,752 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 265 transitions. [2022-11-22 02:05:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 265 transitions. [2022-11-22 02:05:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:05:10,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:10,753 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:10,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:10,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-22 02:05:10,959 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 02:05:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1057666144, now seen corresponding path program 9 times [2022-11-22 02:05:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:05:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727143982] [2022-11-22 02:05:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:10,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:05:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:11,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:05:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727143982] [2022-11-22 02:05:11,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727143982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:05:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445183293] [2022-11-22 02:05:11,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:05:11,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:11,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:11,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:11,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 02:05:11,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:05:11,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:05:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-22 02:05:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:11,924 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:05:11,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 02:05:12,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:05:12,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:12,319 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 21 treesize of output 20 [2022-11-22 02:05:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:13,261 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-22 02:05:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 26 [2022-11-22 02:05:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:13,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:14,615 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 29 treesize of output 25 [2022-11-22 02:05:14,621 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 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-22 02:05:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445183293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261822452] [2022-11-22 02:05:15,492 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 02:05:15,492 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:05:15,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:05:15,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:05:15,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:05:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:15,516 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 [2022-11-22 02:05:15,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:15,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:15,614 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 [2022-11-22 02:05:15,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:05:15,734 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 02:05:15,734 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 25 treesize of output 24 [2022-11-22 02:05:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:15,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:15,858 INFO L321 Elim1Store]: treesize reduction 52, result has 16.1 percent of original size [2022-11-22 02:05:15,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 02:05:16,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:05:21,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15610#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 0) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |ULTIMATE.start_main_~n~1#1| 1) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 1) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:05:21,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:05:21,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:05:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 56 [2022-11-22 02:05:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016748241] [2022-11-22 02:05:21,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 02:05:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:05:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 02:05:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4200, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 02:05:21,111 INFO L87 Difference]: Start difference. First operand 238 states and 265 transitions. Second operand has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:26,423 INFO L93 Difference]: Finished difference Result 491 states and 536 transitions. [2022-11-22 02:05:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-22 02:05:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 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 41 [2022-11-22 02:05:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:26,426 INFO L225 Difference]: With dead ends: 491 [2022-11-22 02:05:26,426 INFO L226 Difference]: Without dead ends: 465 [2022-11-22 02:05:26,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1604, Invalid=12438, Unknown=0, NotChecked=0, Total=14042 [2022-11-22 02:05:26,428 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1213 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:26,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 822 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:05:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-22 02:05:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 262. [2022-11-22 02:05:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 258 states have (on average 1.1395348837209303) internal successors, (294), 261 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2022-11-22 02:05:26,434 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 41 [2022-11-22 02:05:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:26,435 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2022-11-22 02:05:26,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2022-11-22 02:05:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:05:26,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:26,436 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:26,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:26,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:26,642 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 02:05:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2138692553, now seen corresponding path program 7 times [2022-11-22 02:05:26,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:05:26,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641969313] [2022-11-22 02:05:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:05:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:05:28,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:05:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641969313] [2022-11-22 02:05:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641969313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:05:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925637190] [2022-11-22 02:05:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:05:28,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:28,257 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:28,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 02:05:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-22 02:05:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:28,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-22 02:05:28,748 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 [2022-11-22 02:05:28,919 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 [2022-11-22 02:05:29,039 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 [2022-11-22 02:05:29,122 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 [2022-11-22 02:05:29,171 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 [2022-11-22 02:05:29,179 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 [2022-11-22 02:05:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:05:29,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:29,285 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1382 (Array Int Int)) (v_ArrVal_1381 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1381) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1382) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-11-22 02:05:29,294 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1382 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1382) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-22 02:05:33,791 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int)) (v_ArrVal_1382 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1382) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-11-22 02:05:33,801 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1382 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1382) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-11-22 02:05:33,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:05:33,814 INFO L350 Elim1Store]: Elim1 eliminated variable 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 23 treesize of output 24 [2022-11-22 02:05:33,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:05:33,821 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 [2022-11-22 02:05:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 18 not checked. [2022-11-22 02:05:34,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925637190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:34,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128419826] [2022-11-22 02:05:34,085 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 02:05:34,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:05:34,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:05:34,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:05:34,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:05:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:34,115 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 [2022-11-22 02:05:34,150 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 11 treesize of output 7 [2022-11-22 02:05:34,193 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 14 treesize of output 10 [2022-11-22 02:05:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:34,274 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 [2022-11-22 02:05:34,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:34,358 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 14 treesize of output 10 [2022-11-22 02:05:34,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:34,456 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 02:05:34,456 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 25 treesize of output 24 [2022-11-22 02:05:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:34,608 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 02:05:34,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 02:05:34,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:05:34,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:05:35,051 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 [2022-11-22 02:05:35,262 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:05:42,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16773#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:05:42,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:05:42,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:05:42,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 44 [2022-11-22 02:05:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738791456] [2022-11-22 02:05:42,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:05:42,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 02:05:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:05:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 02:05:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3163, Unknown=37, NotChecked=468, Total=3906 [2022-11-22 02:05:42,003 INFO L87 Difference]: Start difference. First operand 262 states and 294 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:05:46,151 INFO L93 Difference]: Finished difference Result 289 states and 320 transitions. [2022-11-22 02:05:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 02:05:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-22 02:05:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:05:46,153 INFO L225 Difference]: With dead ends: 289 [2022-11-22 02:05:46,153 INFO L226 Difference]: Without dead ends: 227 [2022-11-22 02:05:46,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 2174 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=708, Invalid=7643, Unknown=37, NotChecked=732, Total=9120 [2022-11-22 02:05:46,154 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 377 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 41 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:05:46,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 615 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 781 Invalid, 4 Unknown, 288 Unchecked, 0.7s Time] [2022-11-22 02:05:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-22 02:05:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-22 02:05:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.1524663677130045) internal successors, (257), 226 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 257 transitions. [2022-11-22 02:05:46,158 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 257 transitions. Word has length 43 [2022-11-22 02:05:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:05:46,159 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 257 transitions. [2022-11-22 02:05:46,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:05:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 257 transitions. [2022-11-22 02:05:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:05:46,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:05:46,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:05:46,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-22 02:05:46,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-22 02:05:46,366 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 02:05:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:05:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash 512054672, now seen corresponding path program 8 times [2022-11-22 02:05:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:05:46,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898090943] [2022-11-22 02:05:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:05:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:05:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:05:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:05:47,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:05:47,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898090943] [2022-11-22 02:05:47,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898090943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:05:47,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396365196] [2022-11-22 02:05:47,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:05:47,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:05:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:05:47,446 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:05:47,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b484027-a1ea-4b3b-9d83-09787135a0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 02:05:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:05:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:05:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-22 02:05:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:05:47,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:05:48,220 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 13 treesize of output 9 [2022-11-22 02:05:48,425 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 [2022-11-22 02:05:48,636 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 [2022-11-22 02:05:48,771 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 [2022-11-22 02:05:49,521 INFO L321 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-11-22 02:05:49,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2022-11-22 02:05:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:05:49,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:51,562 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1443 (Array Int Int)) (v_ArrVal_1442 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_185| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1442) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1443) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (<= (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_185|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select .cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_185|)) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_185|) 0) (< (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_185|) (= (select .cse0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)))) is different from false [2022-11-22 02:05:52,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:05:52,517 INFO L350 Elim1Store]: Elim1 eliminated variable 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 68 treesize of output 46 [2022-11-22 02:05:52,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:05:52,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 108 [2022-11-22 02:05:52,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:05:52,590 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 32 treesize of output 42 [2022-11-22 02:05:52,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:05:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-22 02:05:53,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396365196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:05:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092801991] [2022-11-22 02:05:53,815 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 02:05:53,815 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:05:53,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:05:53,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:05:53,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:05:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:53,841 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 [2022-11-22 02:05:53,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:53,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:05:53,951 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 14 treesize of output 10 [2022-11-22 02:05:54,000 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 14 treesize of output 10 [2022-11-22 02:05:54,046 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 14 treesize of output 10 [2022-11-22 02:05:54,076 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 [2022-11-22 02:05:54,131 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 14 treesize of output 10 [2022-11-22 02:05:54,197 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 02:05:54,197 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 25 treesize of output 24 [2022-11-22 02:05:54,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:54,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:05:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:05:54,347 INFO L321 Elim1Store]: treesize reduction 79, result has 18.6 percent of original size [2022-11-22 02:05:54,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 02:05:54,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:05:54,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:05:54,835 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 11 treesize of output 7 [2022-11-22 02:05:55,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:06:03,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17705#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= 0 |#NULL.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-22 02:06:03,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:06:03,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:06:03,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 23] total 69 [2022-11-22 02:06:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354266375] [2022-11-22 02:06:03,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:06:03,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-22 02:06:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-22 02:06:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=6826, Unknown=22, NotChecked=168, Total=7482 [2022-11-22 02:06:03,392 INFO L87 Difference]: Start difference. First operand 227 states and 257 transitions. Second operand has 70 states, 70 states have (on average 1.8285714285714285) internal successors, (128), 69 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:06:14,908 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 78 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)