./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS --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 fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- 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-8393723 [2022-11-19 07:27:01,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:27:01,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:27:01,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:27:01,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:27:01,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:27:01,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:27:01,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:27:01,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:27:01,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:27:01,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:27:01,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:27:01,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:27:01,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:27:01,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:27:01,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:27:01,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:27:01,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:27:01,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:27:01,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:27:01,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:27:01,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:27:01,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:27:01,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:27:01,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:27:01,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:27:01,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:27:01,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:27:01,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:27:01,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:27:01,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:27:01,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:27:01,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:27:01,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:27:01,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:27:01,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:27:01,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:27:01,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:27:01,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:27:01,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:27:01,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:27:01,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:27:01,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:27:01,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:27:01,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:27:01,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:27:01,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:27:01,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:27:01,134 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:27:01,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:27:01,135 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:27:01,135 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:27:01,135 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:27:01,135 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:27:01,136 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:27:01,136 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:27:01,136 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:27:01,136 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:27:01,137 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:27:01,137 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:27:01,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:27:01,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:27:01,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:27:01,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:27:01,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:27:01,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:27:01,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:27:01,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:27:01,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:27:01,140 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:27:01,140 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:27:01,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:27:01,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:27:01,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:27:01,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:27:01,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:27:01,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:27:01,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:01,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:27:01,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:27:01,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:27:01,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:27:01,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:27:01,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:27:01,144 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_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2022-11-19 07:27:01,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:27:01,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:27:01,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:27:01,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:27:01,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:27:01,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2022-11-19 07:27:01,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/data/85a0841b4/37d2f287aaff4b43aa1cc94f0cf49a80/FLAGa2345f871 [2022-11-19 07:27:02,037 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:27:02,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2022-11-19 07:27:02,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/data/85a0841b4/37d2f287aaff4b43aa1cc94f0cf49a80/FLAGa2345f871 [2022-11-19 07:27:02,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/data/85a0841b4/37d2f287aaff4b43aa1cc94f0cf49a80 [2022-11-19 07:27:02,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:27:02,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:27:02,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:02,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:27:02,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:27:02,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740cdce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02, skipping insertion in model container [2022-11-19 07:27:02,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:27:02,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:27:02,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:02,812 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:27:02,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:02,896 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:27:02,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02 WrapperNode [2022-11-19 07:27:02,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:02,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:02,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:27:02,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:27:02,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,959 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-19 07:27:02,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:02,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:27:02,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:27:02,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:27:02,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:02,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:03,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:03,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:03,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:03,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:27:03,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:27:03,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:27:03,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:27:03,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (1/1) ... [2022-11-19 07:27:03,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:03,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:27:03,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:27:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:27:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:27:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:27:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:27:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:27:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:27:03,214 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:27:03,216 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:27:03,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:27:03,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:27:03,485 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:27:03,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:03 BoogieIcfgContainer [2022-11-19 07:27:03,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:27:03,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:27:03,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:27:03,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:27:03,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:27:02" (1/3) ... [2022-11-19 07:27:03,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b32f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:03, skipping insertion in model container [2022-11-19 07:27:03,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:02" (2/3) ... [2022-11-19 07:27:03,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b32f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:03, skipping insertion in model container [2022-11-19 07:27:03,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:03" (3/3) ... [2022-11-19 07:27:03,498 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2022-11-19 07:27:03,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:27:03,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-19 07:27:03,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:27:03,571 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;@2d67cd2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:27:03,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-19 07:27:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:27:03,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:03,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:27:03,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 104379, now seen corresponding path program 1 times [2022-11-19 07:27:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:03,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048068520] [2022-11-19 07:27:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:03,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048068520] [2022-11-19 07:27:03,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048068520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:03,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:03,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:27:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852218332] [2022-11-19 07:27:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:03,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:03,809 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-19 07:27:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:03,869 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-19 07:27:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:03,871 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 [2022-11-19 07:27:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:03,878 INFO L225 Difference]: With dead ends: 22 [2022-11-19 07:27:03,879 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:27:03,885 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 [2022-11-19 07:27:03,889 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 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 [2022-11-19 07:27:03,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:27:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 07:27:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-19 07:27:03,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 3 [2022-11-19 07:27:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:03,920 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-19 07:27:03,920 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) [2022-11-19 07:27:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-19 07:27:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:27:03,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:03,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:27:03,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:27:03,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 3236553, now seen corresponding path program 1 times [2022-11-19 07:27:03,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:03,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679578653] [2022-11-19 07:27:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:03,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:04,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:04,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679578653] [2022-11-19 07:27:04,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679578653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:04,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:04,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:27:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346734234] [2022-11-19 07:27:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:04,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:04,116 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:04,158 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-19 07:27:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:27:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:04,160 INFO L225 Difference]: With dead ends: 18 [2022-11-19 07:27:04,160 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 07:27:04,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:04,161 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:04,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 07:27:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 07:27:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-19 07:27:04,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2022-11-19 07:27:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:04,166 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-19 07:27:04,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-19 07:27:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:27:04,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:04,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:27:04,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:27:04,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash 3236554, now seen corresponding path program 1 times [2022-11-19 07:27:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492268730] [2022-11-19 07:27:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:04,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492268730] [2022-11-19 07:27:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492268730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:04,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:04,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275010078] [2022-11-19 07:27:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:04,493 INFO L87 Difference]: Start difference. First operand 18 states and 19 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) [2022-11-19 07:27:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:04,584 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-19 07:27:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:04,585 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 [2022-11-19 07:27:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:04,587 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:27:04,588 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 07:27:04,588 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 [2022-11-19 07:27:04,596 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:04,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 07:27:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2022-11-19 07:27:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-19 07:27:04,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2022-11-19 07:27:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:04,608 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-19 07:27:04,609 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) [2022-11-19 07:27:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-19 07:27:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:27:04,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:04,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:27:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:27:04,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:04,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash 3238051, now seen corresponding path program 1 times [2022-11-19 07:27:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:04,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971364236] [2022-11-19 07:27:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:04,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971364236] [2022-11-19 07:27:04,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971364236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:04,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:04,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294251721] [2022-11-19 07:27:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:04,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:04,909 INFO L87 Difference]: Start difference. First operand 20 states and 22 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) [2022-11-19 07:27:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:04,974 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-19 07:27:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:04,975 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 [2022-11-19 07:27:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:04,977 INFO L225 Difference]: With dead ends: 32 [2022-11-19 07:27:04,978 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 07:27:04,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:04,988 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:04,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 07:27:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2022-11-19 07:27:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 07:27:04,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 4 [2022-11-19 07:27:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:04,992 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 07:27:04,992 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) [2022-11-19 07:27:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 07:27:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:27:04,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:04,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 07:27:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:27:04,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1184601517, now seen corresponding path program 1 times [2022-11-19 07:27:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:04,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448421733] [2022-11-19 07:27:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:05,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448421733] [2022-11-19 07:27:05,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448421733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48041809] [2022-11-19 07:27:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:05,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:05,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:27:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:27:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:05,553 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:27:05,554 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 [2022-11-19 07:27:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:05,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48041809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244844581] [2022-11-19 07:27:05,890 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 07:27:05,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:05,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:05,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:05,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:05,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 07:27:06,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:06,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:06,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:06,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:06,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:06,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:06,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:06,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-19 07:27:06,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274474891] [2022-11-19 07:27:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:06,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:27:06,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:27:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:27:06,663 INFO L87 Difference]: Start difference. First operand 21 states and 23 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) [2022-11-19 07:27:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:07,059 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-11-19 07:27:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:27:07,060 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 [2022-11-19 07:27:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:07,060 INFO L225 Difference]: With dead ends: 45 [2022-11-19 07:27:07,061 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 07:27:07,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:27:07,062 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 157 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:07,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 66 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 07:27:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 19. [2022-11-19 07:27:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-19 07:27:07,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-11-19 07:27:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:07,065 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-19 07:27:07,065 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) [2022-11-19 07:27:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-19 07:27:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:27:07,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:07,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:27:07,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:07,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1184600020, now seen corresponding path program 1 times [2022-11-19 07:27:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:07,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317363391] [2022-11-19 07:27:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:07,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317363391] [2022-11-19 07:27:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317363391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107610955] [2022-11-19 07:27:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:07,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:07,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:07,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:07,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:27:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:27:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:07,671 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:27:07,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-19 07:27:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:07,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107610955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67384856] [2022-11-19 07:27:07,976 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 07:27:07,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:07,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:07,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:07,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:08,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:08,037 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 [2022-11-19 07:27:08,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:08,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:08,167 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 14 treesize of output 10 [2022-11-19 07:27:08,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:08,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length2~0#1|)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (not (<= (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:08,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:08,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:08,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-19 07:27:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577926846] [2022-11-19 07:27:08,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:27:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:27:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:27:08,814 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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) [2022-11-19 07:27:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:09,188 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-19 07:27:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:27:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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 6 [2022-11-19 07:27:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:09,190 INFO L225 Difference]: With dead ends: 30 [2022-11-19 07:27:09,190 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:27:09,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:27:09,191 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:09,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 55 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:27:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2022-11-19 07:27:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-19 07:27:09,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2022-11-19 07:27:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:09,194 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-19 07:27:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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) [2022-11-19 07:27:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-19 07:27:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:27:09,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:09,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:27:09,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:09,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:09,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167129, now seen corresponding path program 1 times [2022-11-19 07:27:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127934961] [2022-11-19 07:27:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:09,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:09,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127934961] [2022-11-19 07:27:09,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127934961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:09,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:09,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:09,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817787258] [2022-11-19 07:27:09,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:09,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:09,548 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:09,603 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-19 07:27:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2022-11-19 07:27:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:09,604 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:27:09,604 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 07:27:09,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:27:09,605 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 07:27:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-11-19 07:27:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-19 07:27:09,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2022-11-19 07:27:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:09,609 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-19 07:27:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-19 07:27:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:27:09,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:09,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:27:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:27:09,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167130, now seen corresponding path program 1 times [2022-11-19 07:27:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:09,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440820509] [2022-11-19 07:27:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:09,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440820509] [2022-11-19 07:27:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440820509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:09,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335154437] [2022-11-19 07:27:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:09,656 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:09,687 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-19 07:27:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:27:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2022-11-19 07:27:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:09,688 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:27:09,688 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:27:09,688 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 [2022-11-19 07:27:09,689 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:09,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:27:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 07:27:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 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) [2022-11-19 07:27:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-19 07:27:09,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 6 [2022-11-19 07:27:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:09,692 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-19 07:27:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-19 07:27:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:27:09,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:09,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:27:09,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524653, now seen corresponding path program 1 times [2022-11-19 07:27:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281668498] [2022-11-19 07:27:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:09,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:09,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:09,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281668498] [2022-11-19 07:27:09,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281668498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:09,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:09,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941011118] [2022-11-19 07:27:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:09,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:09,817 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:09,865 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-19 07:27:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:27:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:09,867 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:27:09,867 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:27:09,867 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 [2022-11-19 07:27:09,870 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:09,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:27:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:27:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-19 07:27:09,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2022-11-19 07:27:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:09,875 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-19 07:27:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-19 07:27:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:27:09,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:09,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:27:09,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524654, now seen corresponding path program 1 times [2022-11-19 07:27:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399224527] [2022-11-19 07:27:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:10,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399224527] [2022-11-19 07:27:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399224527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:10,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:27:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479820253] [2022-11-19 07:27:10,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:10,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:27:10,185 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:10,339 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-19 07:27:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:10,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:27:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:10,340 INFO L225 Difference]: With dead ends: 32 [2022-11-19 07:27:10,340 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 07:27:10,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:27:10,341 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:10,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 16 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 07:27:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2022-11-19 07:27:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 07:27:10,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-11-19 07:27:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:10,344 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 07:27:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 07:27:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:27:10,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:10,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:10,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:27:10,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1328103237, now seen corresponding path program 1 times [2022-11-19 07:27:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:10,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049961595] [2022-11-19 07:27:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:10,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049961595] [2022-11-19 07:27:10,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049961595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932302363] [2022-11-19 07:27:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:10,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:10,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:10,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:27:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:27:10,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:10,799 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 [2022-11-19 07:27:10,805 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 [2022-11-19 07:27:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:10,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:10,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:10,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932302363] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:10,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:27:10,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 13 [2022-11-19 07:27:10,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535906665] [2022-11-19 07:27:10,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:10,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:10,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:27:10,996 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-19 07:27:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:11,213 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-19 07:27:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:27:11,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-11-19 07:27:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:11,214 INFO L225 Difference]: With dead ends: 31 [2022-11-19 07:27:11,214 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:27:11,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:27:11,215 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:11,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:27:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-11-19 07:27:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 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) [2022-11-19 07:27:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-19 07:27:11,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-11-19 07:27:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:11,218 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-19 07:27:11,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-19 07:27:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-19 07:27:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:27:11,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:11,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:11,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:11,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:27:11,420 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1355666300, now seen corresponding path program 1 times [2022-11-19 07:27:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:11,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070171684] [2022-11-19 07:27:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:11,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070171684] [2022-11-19 07:27:11,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070171684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:11,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:11,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:27:11,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221536859] [2022-11-19 07:27:11,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:11,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:11,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:11,560 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:11,580 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-19 07:27:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:27:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:27:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:11,581 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:27:11,581 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 07:27:11,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:11,582 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:11,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 07:27:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 07:27:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 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) [2022-11-19 07:27:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-19 07:27:11,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-19 07:27:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:11,585 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-19 07:27:11,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-19 07:27:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:27:11,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:11,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:27:11,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1355665169, now seen corresponding path program 1 times [2022-11-19 07:27:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423092524] [2022-11-19 07:27:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:11,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423092524] [2022-11-19 07:27:11,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423092524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:11,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:11,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:27:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103263384] [2022-11-19 07:27:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:27:11,797 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-19 07:27:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:11,956 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-19 07:27:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 [2022-11-19 07:27:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:11,957 INFO L225 Difference]: With dead ends: 21 [2022-11-19 07:27:11,957 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:27:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:27:11,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:11,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:27:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-19 07:27:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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) [2022-11-19 07:27:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-19 07:27:11,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-11-19 07:27:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-19 07:27:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-19 07:27:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-19 07:27:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:27:11,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:11,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:27:11,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash 284798392, now seen corresponding path program 1 times [2022-11-19 07:27:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:11,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324008834] [2022-11-19 07:27:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:12,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324008834] [2022-11-19 07:27:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324008834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858440371] [2022-11-19 07:27:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:12,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:12,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:12,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:27:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:12,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:27:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:12,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:12,493 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 [2022-11-19 07:27:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858440371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74738587] [2022-11-19 07:27:12,520 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:12,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:12,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:12,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:12,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:12,577 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 [2022-11-19 07:27:12,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:27:12,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:12,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:12,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:12,912 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:12,913 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:13,197 INFO L321 Elim1Store]: treesize reduction 169, result has 12.9 percent of original size [2022-11-19 07:27:13,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 261 [2022-11-19 07:27:13,642 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:13,642 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 19 treesize of output 18 [2022-11-19 07:27:13,807 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:13,807 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 19 treesize of output 18 [2022-11-19 07:27:13,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:15,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:15,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:15,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:15,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-11-19 07:27:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451123593] [2022-11-19 07:27:15,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:27:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:27:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:27:15,907 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:16,138 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-19 07:27:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:27:16,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:27:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:16,140 INFO L225 Difference]: With dead ends: 22 [2022-11-19 07:27:16,140 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:27:16,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:27:16,141 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:16,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 13 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:27:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2022-11-19 07:27:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-19 07:27:16,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2022-11-19 07:27:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-19 07:27:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-19 07:27:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:27:16,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:16,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:16,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:16,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:27:16,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash 238815549, now seen corresponding path program 1 times [2022-11-19 07:27:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:16,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715006108] [2022-11-19 07:27:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:16,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715006108] [2022-11-19 07:27:16,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715006108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067697685] [2022-11-19 07:27:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:16,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:16,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:16,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:16,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:27:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:16,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:27:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:16,910 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 [2022-11-19 07:27:16,918 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 [2022-11-19 07:27:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:17,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:17,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067697685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:17,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326810827] [2022-11-19 07:27:17,402 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:17,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:17,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:17,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:17,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:17,446 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 [2022-11-19 07:27:17,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:17,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:17,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:17,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:17,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:17,728 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:17,728 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:18,011 INFO L321 Elim1Store]: treesize reduction 171, result has 20.5 percent of original size [2022-11-19 07:27:18,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 265 [2022-11-19 07:27:18,451 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:18,451 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 19 treesize of output 18 [2022-11-19 07:27:18,568 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:18,568 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 19 treesize of output 18 [2022-11-19 07:27:18,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:20,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1102#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:20,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:20,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:20,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-11-19 07:27:20,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486707058] [2022-11-19 07:27:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:27:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:27:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:27:20,603 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:21,324 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-19 07:27:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:27:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2022-11-19 07:27:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:21,325 INFO L225 Difference]: With dead ends: 21 [2022-11-19 07:27:21,325 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:27:21,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:27:21,327 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:21,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 11 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:27:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-19 07:27:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 07:27:21,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2022-11-19 07:27:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:21,331 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 07:27:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 07:27:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:27:21,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:21,332 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:21,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:21,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2088173760, now seen corresponding path program 2 times [2022-11-19 07:27:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:21,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187751512] [2022-11-19 07:27:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:22,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187751512] [2022-11-19 07:27:22,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187751512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609828028] [2022-11-19 07:27:22,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:22,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:22,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:22,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:27:22,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:27:22,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-19 07:27:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:22,301 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 [2022-11-19 07:27:22,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:27:22,453 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 [2022-11-19 07:27:22,486 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 [2022-11-19 07:27:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:22,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:22,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:22,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-19 07:27:22,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:22,656 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 [2022-11-19 07:27:22,659 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 [2022-11-19 07:27:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:22,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609828028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144984334] [2022-11-19 07:27:22,816 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:22,816 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:22,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:22,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:22,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:22,867 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 [2022-11-19 07:27:22,912 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 [2022-11-19 07:27:22,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:22,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:23,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:23,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:23,146 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:23,147 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:23,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:23,434 INFO L321 Elim1Store]: treesize reduction 171, result has 20.5 percent of original size [2022-11-19 07:27:23,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 265 [2022-11-19 07:27:23,790 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:23,790 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 19 treesize of output 18 [2022-11-19 07:27:23,921 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:23,922 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 19 treesize of output 18 [2022-11-19 07:27:23,985 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:25,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1280#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:25,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:25,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-11-19 07:27:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348971812] [2022-11-19 07:27:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:27:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:27:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=877, Unknown=8, NotChecked=0, Total=992 [2022-11-19 07:27:26,000 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:26,360 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-19 07:27:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:27:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 07:27:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:26,361 INFO L225 Difference]: With dead ends: 31 [2022-11-19 07:27:26,361 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:27:26,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=188, Invalid=1210, Unknown=8, NotChecked=0, Total=1406 [2022-11-19 07:27:26,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:26,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 47 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-19 07:27:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:27:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-19 07:27:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-19 07:27:26,373 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-11-19 07:27:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:26,374 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-19 07:27:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-19 07:27:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:27:26,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:26,375 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:27:26,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:27:26,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash 980812489, now seen corresponding path program 3 times [2022-11-19 07:27:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:26,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553830574] [2022-11-19 07:27:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:26,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:26,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:26,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553830574] [2022-11-19 07:27:26,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553830574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:26,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622402655] [2022-11-19 07:27:26,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:27:26,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:26,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:26,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:27:27,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:27:27,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:27:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:27,037 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:27:27,038 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 [2022-11-19 07:27:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:27,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:27,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622402655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:27,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169614653] [2022-11-19 07:27:27,413 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:27,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:27,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:27,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:27,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:27,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 07:27:27,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:27:27,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:27,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:27,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:27,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:27,711 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:27,711 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:27,932 INFO L321 Elim1Store]: treesize reduction 169, result has 12.9 percent of original size [2022-11-19 07:27:27,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 261 [2022-11-19 07:27:28,334 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:28,335 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 19 treesize of output 18 [2022-11-19 07:27:28,450 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:28,450 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 19 treesize of output 18 [2022-11-19 07:27:28,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:30,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1478#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:30,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:30,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:30,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-19 07:27:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064747253] [2022-11-19 07:27:30,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:27:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:27:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:27:30,522 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-11-19 07:27:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:30,848 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-11-19 07:27:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:27:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) Word has length 18 [2022-11-19 07:27:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:30,849 INFO L225 Difference]: With dead ends: 27 [2022-11-19 07:27:30,849 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 07:27:30,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:27:30,850 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:30,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 23 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 07:27:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-19 07:27:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-19 07:27:30,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-11-19 07:27:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:30,853 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-19 07:27:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-11-19 07:27:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-19 07:27:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:27:30,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:30,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:27:30,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:31,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:27:31,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 340416076, now seen corresponding path program 2 times [2022-11-19 07:27:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:31,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088955016] [2022-11-19 07:27:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:31,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:31,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088955016] [2022-11-19 07:27:31,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088955016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381082630] [2022-11-19 07:27:31,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:31,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:31,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:27:31,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:27:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:31,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-19 07:27:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:31,781 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 [2022-11-19 07:27:31,784 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 [2022-11-19 07:27:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:32,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:32,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381082630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045809864] [2022-11-19 07:27:32,541 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:32,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:32,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:32,542 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:32,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:32,576 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 [2022-11-19 07:27:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:32,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:32,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:32,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:32,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:32,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:32,819 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:32,819 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:33,076 INFO L321 Elim1Store]: treesize reduction 169, result has 22.8 percent of original size [2022-11-19 07:27:33,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 266 treesize of output 277 [2022-11-19 07:27:33,511 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:33,512 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 19 treesize of output 18 [2022-11-19 07:27:33,624 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:33,625 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 19 treesize of output 18 [2022-11-19 07:27:33,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:35,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1693#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:35,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:35,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:35,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-11-19 07:27:35,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538582203] [2022-11-19 07:27:35,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:35,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:27:35,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:35,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:27:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:27:35,839 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-11-19 07:27:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:36,901 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-19 07:27:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:27:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 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 19 [2022-11-19 07:27:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:36,902 INFO L225 Difference]: With dead ends: 26 [2022-11-19 07:27:36,902 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:27:36,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:27:36,903 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:36,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:27:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:27:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-19 07:27:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-19 07:27:36,905 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2022-11-19 07:27:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:36,906 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-19 07:27:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-11-19 07:27:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-19 07:27:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:27:36,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:36,906 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:27:36,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:37,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:27:37,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash 917529937, now seen corresponding path program 4 times [2022-11-19 07:27:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:37,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795129054] [2022-11-19 07:27:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:37,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:37,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795129054] [2022-11-19 07:27:37,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795129054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:37,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576442305] [2022-11-19 07:27:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:27:37,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:37,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:37,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:27:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:37,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 07:27:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:37,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:27:37,906 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 [2022-11-19 07:27:38,122 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 17 treesize of output 19 [2022-11-19 07:27:38,296 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 [2022-11-19 07:27:38,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:27:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:38,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:39,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:39,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-19 07:27:39,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:39,331 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 [2022-11-19 07:27:39,344 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 [2022-11-19 07:27:39,349 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 [2022-11-19 07:27:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576442305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992696956] [2022-11-19 07:27:39,556 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:39,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:39,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:39,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:39,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:39,591 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 [2022-11-19 07:27:39,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:39,667 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 [2022-11-19 07:27:39,691 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 14 treesize of output 10 [2022-11-19 07:27:39,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:39,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:39,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:39,849 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:39,850 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:39,952 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:39,953 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 19 treesize of output 18 [2022-11-19 07:27:40,062 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:40,062 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 19 treesize of output 18 [2022-11-19 07:27:40,113 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:41,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1945#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:41,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:41,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:41,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2022-11-19 07:27:41,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787262287] [2022-11-19 07:27:41,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:41,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:27:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:27:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2352, Unknown=3, NotChecked=0, Total=2550 [2022-11-19 07:27:41,720 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:42,728 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2022-11-19 07:27:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:27:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:27:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:42,729 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:27:42,729 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 07:27:42,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=375, Invalid=3912, Unknown=3, NotChecked=0, Total=4290 [2022-11-19 07:27:42,731 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:42,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 58 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 227 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2022-11-19 07:27:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 07:27:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-11-19 07:27:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-19 07:27:42,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2022-11-19 07:27:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:42,734 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-19 07:27:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-19 07:27:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:27:42,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:42,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 07:27:42,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:42,936 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1572968091, now seen corresponding path program 3 times [2022-11-19 07:27:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:42,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817195582] [2022-11-19 07:27:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:43,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817195582] [2022-11-19 07:27:43,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817195582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365959279] [2022-11-19 07:27:43,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:27:43,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:43,719 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:27:43,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:27:43,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:27:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:43,919 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 [2022-11-19 07:27:43,923 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 [2022-11-19 07:27:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:44,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:45,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365959279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730323148] [2022-11-19 07:27:45,197 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:45,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:45,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:45,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:45,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,234 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 [2022-11-19 07:27:45,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:27:45,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:45,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:27:45,402 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 [2022-11-19 07:27:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,467 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:27:45,468 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:27:45,725 INFO L321 Elim1Store]: treesize reduction 169, result has 22.8 percent of original size [2022-11-19 07:27:45,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 267 [2022-11-19 07:27:46,106 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:46,106 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 19 treesize of output 18 [2022-11-19 07:27:46,214 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:27:46,214 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 19 treesize of output 18 [2022-11-19 07:27:46,270 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:48,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2244#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:27:48,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:48,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:48,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-11-19 07:27:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771736792] [2022-11-19 07:27:48,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:48,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:27:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:27:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:27:48,465 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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) [2022-11-19 07:27:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:50,062 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-11-19 07:27:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:27:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 07:27:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:50,063 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:27:50,063 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 07:27:50,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=445, Invalid=3215, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 07:27:50,065 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 193 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:50,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 34 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:27:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 07:27:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-19 07:27:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-19 07:27:50,070 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2022-11-19 07:27:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:50,070 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-19 07:27:50,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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) [2022-11-19 07:27:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-19 07:27:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:27:50,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:50,071 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 07:27:50,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:50,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:50,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:27:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2095771998, now seen corresponding path program 5 times [2022-11-19 07:27:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:50,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159736009] [2022-11-19 07:27:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:51,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159736009] [2022-11-19 07:27:51,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159736009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087181659] [2022-11-19 07:27:51,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:51,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:51,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:51,124 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:51,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:27:51,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-19 07:27:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:51,434 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 [2022-11-19 07:27:51,564 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 [2022-11-19 07:27:51,715 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 [2022-11-19 07:27:51,885 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 [2022-11-19 07:27:52,075 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 [2022-11-19 07:27:58,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:27:58,253 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 20 treesize of output 17 [2022-11-19 07:27:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:58,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:03,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:28:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-19 07:28:03,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:28:03,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-19 07:28:03,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 07:28:03,431 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 [2022-11-19 07:28:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:28:03,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087181659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:03,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728033799] [2022-11-19 07:28:03,742 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:28:03,742 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:03,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:03,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:03,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:03,775 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 [2022-11-19 07:28:03,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:28:03,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:28:03,881 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 14 treesize of output 10 [2022-11-19 07:28:03,928 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 14 treesize of output 10 [2022-11-19 07:28:03,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:03,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:04,002 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:28:04,003 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:28:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:04,281 INFO L321 Elim1Store]: treesize reduction 163, result has 22.7 percent of original size [2022-11-19 07:28:04,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 269 [2022-11-19 07:28:05,133 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:28:05,133 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 19 treesize of output 18 [2022-11-19 07:28:05,231 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:28:05,232 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 19 treesize of output 18 [2022-11-19 07:28:05,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:08,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2559#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:28:08,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:08,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:08,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2022-11-19 07:28:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815967974] [2022-11-19 07:28:08,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:08,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 07:28:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 07:28:08,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3176, Unknown=23, NotChecked=0, Total=3422 [2022-11-19 07:28:08,011 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2022-11-19 07:28:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:57,461 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-19 07:28:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 07:28:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) Word has length 28 [2022-11-19 07:28:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:57,462 INFO L225 Difference]: With dead ends: 54 [2022-11-19 07:28:57,463 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:28:57,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=705, Invalid=6747, Unknown=30, NotChecked=0, Total=7482 [2022-11-19 07:28:57,464 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:57,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 53 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-19 07:28:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:28:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-11-19 07:28:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 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) [2022-11-19 07:28:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-19 07:28:57,467 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 28 [2022-11-19 07:28:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:57,467 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-19 07:28:57,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2022-11-19 07:28:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-19 07:28:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:28:57,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:57,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-19 07:28:57,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:57,674 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:28:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1001579990, now seen corresponding path program 4 times [2022-11-19 07:28:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:57,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227268761] [2022-11-19 07:28:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:57,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:28:58,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227268761] [2022-11-19 07:28:58,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227268761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600425169] [2022-11-19 07:28:58,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:28:58,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:58,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:58,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:28:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:58,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:28:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:58,714 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 [2022-11-19 07:28:58,717 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 [2022-11-19 07:28:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:28:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:00,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600425169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499775445] [2022-11-19 07:29:00,091 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:29:00,091 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:00,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:00,091 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:00,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:00,129 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 [2022-11-19 07:29:00,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:00,195 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 14 treesize of output 10 [2022-11-19 07:29:00,220 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 [2022-11-19 07:29:00,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:00,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:00,359 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:29:00,359 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:29:00,493 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:00,494 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 19 treesize of output 18 [2022-11-19 07:29:00,627 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:00,627 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 19 treesize of output 18 [2022-11-19 07:29:00,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:03,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2942#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:29:03,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:03,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:03,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2022-11-19 07:29:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93056776] [2022-11-19 07:29:03,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:29:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:29:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:29:03,172 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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) [2022-11-19 07:29:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:05,055 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-11-19 07:29:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:29:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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 [2022-11-19 07:29:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:05,058 INFO L225 Difference]: With dead ends: 38 [2022-11-19 07:29:05,058 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 07:29:05,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=605, Invalid=3951, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:29:05,061 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 308 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:05,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 45 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 07:29:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-19 07:29:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 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) [2022-11-19 07:29:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-19 07:29:05,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2022-11-19 07:29:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:05,064 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-19 07:29:05,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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) [2022-11-19 07:29:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-19 07:29:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:29:05,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:05,065 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-19 07:29:05,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:05,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:05,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:29:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -931681101, now seen corresponding path program 6 times [2022-11-19 07:29:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:05,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96714872] [2022-11-19 07:29:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:06,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:06,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96714872] [2022-11-19 07:29:06,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96714872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:06,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975057702] [2022-11-19 07:29:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:06,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:06,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:06,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:06,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:29:06,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-19 07:29:06,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:06,802 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 [2022-11-19 07:29:07,110 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 [2022-11-19 07:29:07,270 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 [2022-11-19 07:29:07,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:29:07,453 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 [2022-11-19 07:29:07,476 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 [2022-11-19 07:29:07,486 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 [2022-11-19 07:29:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:07,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:07,506 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-19 07:29:16,625 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_497 (Array Int Int)) (v_ArrVal_499 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_497) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:16,635 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:16,644 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_496 (Array Int Int)) (v_ArrVal_499 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_496) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:16,653 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:16,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:16,660 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-19 07:29:16,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:16,667 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 [2022-11-19 07:29:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 29 not checked. [2022-11-19 07:29:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975057702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43560169] [2022-11-19 07:29:16,877 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:29:16,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:16,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:16,878 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:16,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:16,909 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 [2022-11-19 07:29:16,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:29:16,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:17,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:17,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:17,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:17,153 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:29:17,154 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:29:17,244 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:17,244 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 19 treesize of output 18 [2022-11-19 07:29:17,370 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:17,370 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 19 treesize of output 18 [2022-11-19 07:29:17,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:19,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3301#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:29:19,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:19,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:19,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 45 [2022-11-19 07:29:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800569618] [2022-11-19 07:29:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:19,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:29:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:29:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2165, Unknown=36, NotChecked=490, Total=2862 [2022-11-19 07:29:19,967 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:20,884 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-11-19 07:29:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:29:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-19 07:29:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:20,885 INFO L225 Difference]: With dead ends: 61 [2022-11-19 07:29:20,885 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 07:29:20,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=236, Invalid=3054, Unknown=36, NotChecked=580, Total=3906 [2022-11-19 07:29:20,887 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:20,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 280 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2022-11-19 07:29:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 07:29:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-19 07:29:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 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) [2022-11-19 07:29:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-19 07:29:20,890 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-11-19 07:29:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:20,891 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-19 07:29:20,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-19 07:29:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:29:20,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:20,892 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 07:29:20,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 07:29:21,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:29:21,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:29:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash 880254588, now seen corresponding path program 7 times [2022-11-19 07:29:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:21,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972913503] [2022-11-19 07:29:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:21,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:21,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972913503] [2022-11-19 07:29:21,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972913503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:21,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115556403] [2022-11-19 07:29:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:29:21,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:21,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:21,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:29:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-19 07:29:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:22,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:22,509 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 [2022-11-19 07:29:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:22,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115556403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:22,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895265752] [2022-11-19 07:29:22,644 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:29:22,644 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:22,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:22,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:22,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,680 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 [2022-11-19 07:29:22,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:22,773 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 14 treesize of output 10 [2022-11-19 07:29:22,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:22,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:22,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:22,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:22,941 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:29:22,941 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:29:23,053 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:23,053 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 19 treesize of output 18 [2022-11-19 07:29:23,166 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:23,167 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 19 treesize of output 18 [2022-11-19 07:29:23,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:24,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3675#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:29:24,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:24,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:24,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-19 07:29:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190034945] [2022-11-19 07:29:24,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:24,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:29:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:24,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:29:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:29:24,719 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:25,442 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-19 07:29:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:29:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 07:29:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:25,443 INFO L225 Difference]: With dead ends: 45 [2022-11-19 07:29:25,443 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 07:29:25,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:29:25,445 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:25,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 45 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 07:29:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-19 07:29:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.075) internal successors, (43), 41 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) [2022-11-19 07:29:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-19 07:29:25,447 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2022-11-19 07:29:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:25,448 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-19 07:29:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-19 07:29:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:29:25,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:25,449 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 07:29:25,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:25,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:29:25,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:29:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1518088441, now seen corresponding path program 5 times [2022-11-19 07:29:25,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547223407] [2022-11-19 07:29:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:25,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:26,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547223407] [2022-11-19 07:29:26,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547223407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198850406] [2022-11-19 07:29:26,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:29:26,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:26,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:26,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:26,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:29:27,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:29:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:27,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-19 07:29:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:27,146 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 [2022-11-19 07:29:27,152 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 [2022-11-19 07:29:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:28,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:29,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:29,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198850406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114868517] [2022-11-19 07:29:29,079 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:29:29,079 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:29,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:29,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:29,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:29,106 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 [2022-11-19 07:29:29,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:29,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:29,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:29:29,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:29,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:29,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:29,354 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:29:29,354 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:29:29,441 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:29,441 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 19 treesize of output 18 [2022-11-19 07:29:29,534 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:29,534 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 19 treesize of output 18 [2022-11-19 07:29:29,581 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:31,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4065#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:29:31,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:31,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:31,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 48 [2022-11-19 07:29:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385924961] [2022-11-19 07:29:31,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:31,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 07:29:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 07:29:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:29:31,475 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 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) [2022-11-19 07:29:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:34,288 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-19 07:29:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:29:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 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 37 [2022-11-19 07:29:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:34,289 INFO L225 Difference]: With dead ends: 44 [2022-11-19 07:29:34,289 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 07:29:34,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=934, Invalid=5872, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 07:29:34,290 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 264 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:34,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 57 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 07:29:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-19 07:29:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 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) [2022-11-19 07:29:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-19 07:29:34,293 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2022-11-19 07:29:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:34,293 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-19 07:29:34,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 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) [2022-11-19 07:29:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-19 07:29:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:29:34,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:34,294 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 07:29:34,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:34,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:34,504 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:29:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -632885372, now seen corresponding path program 8 times [2022-11-19 07:29:34,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:34,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139509630] [2022-11-19 07:29:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:35,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:35,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139509630] [2022-11-19 07:29:35,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139509630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:35,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765064574] [2022-11-19 07:29:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:29:35,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:35,845 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:29:36,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:29:36,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:36,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-19 07:29:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:36,288 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 [2022-11-19 07:29:36,743 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 [2022-11-19 07:29:36,918 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 [2022-11-19 07:29:37,118 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 [2022-11-19 07:29:37,318 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 [2022-11-19 07:29:37,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:29:37,735 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 [2022-11-19 07:29:37,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:37,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:37,904 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 [2022-11-19 07:29:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:37,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:37,924 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-19 07:29:42,213 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:44,263 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_675) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:44,379 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int)) (v_ArrVal_674 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_674) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:29:52,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:52,747 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-19 07:29:52,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:52,753 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 [2022-11-19 07:29:52,758 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 [2022-11-19 07:29:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 34 not checked. [2022-11-19 07:29:53,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765064574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:53,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158288630] [2022-11-19 07:29:53,248 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:29:53,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:53,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:53,248 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:53,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,285 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 [2022-11-19 07:29:53,319 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 [2022-11-19 07:29:53,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:53,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:53,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:29:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:53,537 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:29:53,537 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:29:53,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:53,759 INFO L321 Elim1Store]: treesize reduction 163, result has 21.3 percent of original size [2022-11-19 07:29:53,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 251 treesize of output 260 [2022-11-19 07:29:54,339 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:54,340 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 19 treesize of output 18 [2022-11-19 07:29:54,441 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:29:54,441 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 19 treesize of output 18 [2022-11-19 07:29:54,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:57,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4509#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:29:57,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:57,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:57,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 66 [2022-11-19 07:29:57,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808502194] [2022-11-19 07:29:57,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:57,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-19 07:29:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-19 07:29:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4665, Unknown=65, NotChecked=564, Total=5550 [2022-11-19 07:29:57,352 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:58,772 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-11-19 07:29:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:29:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-19 07:29:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:58,773 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:29:58,773 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 07:29:58,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 4 IntricatePredicates, 3 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=366, Invalid=6725, Unknown=65, NotChecked=676, Total=7832 [2022-11-19 07:29:58,775 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:58,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 212 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 354 Invalid, 0 Unknown, 293 Unchecked, 0.3s Time] [2022-11-19 07:29:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 07:29:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-19 07:29:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-19 07:29:58,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2022-11-19 07:29:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:58,777 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-19 07:29:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-19 07:29:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:29:58,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:58,778 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2022-11-19 07:29:58,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:58,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:29:58,979 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:29:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1368565389, now seen corresponding path program 9 times [2022-11-19 07:29:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768857622] [2022-11-19 07:29:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:59,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768857622] [2022-11-19 07:29:59,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768857622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130054784] [2022-11-19 07:29:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:59,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:59,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:59,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:29:59,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 07:29:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:59,975 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:29:59,976 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 [2022-11-19 07:30:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:00,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130054784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655871583] [2022-11-19 07:30:00,995 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:30:00,995 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:00,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:00,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:00,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:01,028 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 [2022-11-19 07:30:01,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:01,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:01,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:01,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:01,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:01,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:01,262 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:30:01,263 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:30:01,361 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:01,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:30:01,514 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:01,514 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 19 treesize of output 18 [2022-11-19 07:30:01,575 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:04,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4952#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:30:04,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:04,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:04,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-11-19 07:30:04,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373620617] [2022-11-19 07:30:04,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:30:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:30:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2369, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:30:04,044 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 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) [2022-11-19 07:30:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:05,000 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-19 07:30:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:30:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 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 42 [2022-11-19 07:30:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:05,001 INFO L225 Difference]: With dead ends: 51 [2022-11-19 07:30:05,002 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:30:05,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=740, Invalid=3816, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:30:05,003 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 322 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:05,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 69 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:30:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:30:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-11-19 07:30:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 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) [2022-11-19 07:30:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-19 07:30:05,005 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2022-11-19 07:30:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:05,006 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-19 07:30:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 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) [2022-11-19 07:30:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-19 07:30:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:30:05,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:05,007 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2022-11-19 07:30:05,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:30:05,208 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:30:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash -524145912, now seen corresponding path program 6 times [2022-11-19 07:30:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348262550] [2022-11-19 07:30:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:06,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348262550] [2022-11-19 07:30:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348262550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681016031] [2022-11-19 07:30:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:30:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:06,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:06,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:30:06,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:30:06,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-19 07:30:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:06,570 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 [2022-11-19 07:30:06,574 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 [2022-11-19 07:30:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 21 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:08,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:09,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:09,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681016031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807168231] [2022-11-19 07:30:09,377 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:30:09,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:09,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:09,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:09,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:09,410 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 [2022-11-19 07:30:09,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:09,483 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 [2022-11-19 07:30:09,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:09,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:09,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:09,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:09,633 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:30:09,633 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:30:09,726 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:09,727 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 19 treesize of output 18 [2022-11-19 07:30:09,824 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:09,824 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 19 treesize of output 18 [2022-11-19 07:30:09,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:11,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5400#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:30:11,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:11,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:11,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 54 [2022-11-19 07:30:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704743648] [2022-11-19 07:30:11,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:11,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:30:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:30:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:30:11,805 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:14,651 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-11-19 07:30:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:30:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 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 [2022-11-19 07:30:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:14,652 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:30:14,652 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 07:30:14,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1217, Invalid=7525, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:30:14,653 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 309 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:14,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 98 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:30:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 07:30:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-19 07:30:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-19 07:30:14,656 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2022-11-19 07:30:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:14,656 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-19 07:30:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-19 07:30:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:30:14,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:14,657 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2022-11-19 07:30:14,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:14,863 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:30:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1670219541, now seen corresponding path program 10 times [2022-11-19 07:30:14,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:14,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667040987] [2022-11-19 07:30:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:16,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667040987] [2022-11-19 07:30:16,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667040987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641185092] [2022-11-19 07:30:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:30:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:16,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:30:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 07:30:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:16,835 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 [2022-11-19 07:30:17,238 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 [2022-11-19 07:30:17,397 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 [2022-11-19 07:30:17,506 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 [2022-11-19 07:30:17,594 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 [2022-11-19 07:30:17,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:30:17,750 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 [2022-11-19 07:30:17,772 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 [2022-11-19 07:30:17,781 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 [2022-11-19 07:30:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:17,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:30,660 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)))) is different from false [2022-11-19 07:30:43,632 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_881 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_876) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:30:43,640 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-19 07:30:43,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:43,648 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-19 07:30:43,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:43,655 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 [2022-11-19 07:30:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 29 not checked. [2022-11-19 07:30:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641185092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539153912] [2022-11-19 07:30:43,970 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:30:43,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:43,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:43,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:43,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:44,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:44,006 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 [2022-11-19 07:30:44,046 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 [2022-11-19 07:30:44,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:44,113 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 [2022-11-19 07:30:44,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:44,250 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:30:44,251 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:30:44,352 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:44,352 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 19 treesize of output 18 [2022-11-19 07:30:44,466 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:44,466 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 19 treesize of output 18 [2022-11-19 07:30:44,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:46,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5897#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:30:46,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:46,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:46,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 26] total 61 [2022-11-19 07:30:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420425576] [2022-11-19 07:30:46,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-19 07:30:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-19 07:30:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4057, Unknown=143, NotChecked=396, Total=4830 [2022-11-19 07:30:46,568 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 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) [2022-11-19 07:30:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:47,953 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-11-19 07:30:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:30:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 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 46 [2022-11-19 07:30:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:47,954 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:30:47,954 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 07:30:47,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=334, Invalid=6015, Unknown=143, NotChecked=480, Total=6972 [2022-11-19 07:30:47,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:47,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 205 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 284 Unchecked, 0.3s Time] [2022-11-19 07:30:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 07:30:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-19 07:30:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-19 07:30:47,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-19 07:30:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:47,959 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-19 07:30:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 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) [2022-11-19 07:30:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-19 07:30:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 07:30:47,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:47,960 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-19 07:30:47,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 07:30:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:30:48,166 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:30:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1728844638, now seen corresponding path program 11 times [2022-11-19 07:30:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:48,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565979931] [2022-11-19 07:30:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:49,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565979931] [2022-11-19 07:30:49,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565979931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066463615] [2022-11-19 07:30:49,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:30:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:49,129 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:49,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:30:49,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:30:49,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:49,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-19 07:30:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:50,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:50,813 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 [2022-11-19 07:30:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:51,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066463615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003841318] [2022-11-19 07:30:51,011 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:30:51,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:51,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:51,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:51,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:51,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:51,049 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 [2022-11-19 07:30:51,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:51,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:51,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:51,280 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:30:51,280 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:30:51,379 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:51,380 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 19 treesize of output 18 [2022-11-19 07:30:51,478 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:30:51,479 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 19 treesize of output 18 [2022-11-19 07:30:51,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:53,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6397#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:30:53,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:53,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:53,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2022-11-19 07:30:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198368922] [2022-11-19 07:30:53,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 07:30:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 07:30:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2819, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:30:53,227 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:54,707 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-19 07:30:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:30:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 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 48 [2022-11-19 07:30:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:54,708 INFO L225 Difference]: With dead ends: 57 [2022-11-19 07:30:54,708 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 07:30:54,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=893, Invalid=4657, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:30:54,709 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 240 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:54,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 70 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:30:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 07:30:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-11-19 07:30:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-11-19 07:30:54,712 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2022-11-19 07:30:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:54,712 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-11-19 07:30:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-11-19 07:30:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:30:54,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:54,713 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-19 07:30:54,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:54,920 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:30:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2054576215, now seen corresponding path program 7 times [2022-11-19 07:30:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060686721] [2022-11-19 07:30:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:56,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060686721] [2022-11-19 07:30:56,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060686721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285258209] [2022-11-19 07:30:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:30:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:56,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:30:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-19 07:30:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:56,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:56,622 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 [2022-11-19 07:30:56,630 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 [2022-11-19 07:30:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285258209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602369470] [2022-11-19 07:30:59,143 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:30:59,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:59,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:59,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:59,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:59,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:59,175 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 [2022-11-19 07:30:59,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:59,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:30:59,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:59,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:30:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:59,423 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-19 07:30:59,423 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 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:30:59,624 INFO L321 Elim1Store]: treesize reduction 161, result has 23.7 percent of original size [2022-11-19 07:30:59,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 272 [2022-11-19 07:31:00,077 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:31:00,077 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 19 treesize of output 18 [2022-11-19 07:31:00,178 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:31:00,178 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 19 treesize of output 18 [2022-11-19 07:31:00,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:03,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6902#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-19 07:31:03,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:03,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:03,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 59 [2022-11-19 07:31:03,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32139227] [2022-11-19 07:31:03,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-19 07:31:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-19 07:31:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=4496, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 07:31:03,226 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:06,171 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-19 07:31:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:31:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 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 49 [2022-11-19 07:31:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:06,172 INFO L225 Difference]: With dead ends: 56 [2022-11-19 07:31:06,172 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 07:31:06,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1219, Invalid=7711, Unknown=0, NotChecked=0, Total=8930 [2022-11-19 07:31:06,174 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 344 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:06,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 127 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:31:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 07:31:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-19 07:31:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 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) [2022-11-19 07:31:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-19 07:31:06,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2022-11-19 07:31:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:06,177 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-19 07:31:06,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-19 07:31:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:31:06,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:06,178 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2022-11-19 07:31:06,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:06,384 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-19 07:31:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash 301081446, now seen corresponding path program 12 times [2022-11-19 07:31:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028826945] [2022-11-19 07:31:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:08,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028826945] [2022-11-19 07:31:08,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028826945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:08,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491027189] [2022-11-19 07:31:08,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:08,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:08,474 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:08,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc871503-8900-418f-a0e6-10c63410e7e9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:31:08,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-19 07:31:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:09,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:31:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:09,712 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 22 treesize of output 21 [2022-11-19 07:31:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:09,958 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 22 treesize of output 21 [2022-11-19 07:31:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:10,209 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 22 treesize of output 21 [2022-11-19 07:31:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:10,467 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 22 treesize of output 21 [2022-11-19 07:31:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:10,740 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 22 treesize of output 21 [2022-11-19 07:31:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:11,027 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 22 treesize of output 21 [2022-11-19 07:31:11,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:11,293 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 22 treesize of output 21 [2022-11-19 07:31:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:11,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:11,520 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 [2022-11-19 07:31:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:11,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:08,055 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| Int) (v_ArrVal_1112 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| Int) (v_ArrVal_1111 Int) (v_ArrVal_1114 Int) (v_ArrVal_1102 Int) (v_ArrVal_1104 Int) (v_ArrVal_1106 Int) (v_ArrVal_1109 Int)) (or (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266|) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242| (store (store (store (store (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| v_ArrVal_1102) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| v_ArrVal_1104) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| v_ArrVal_1106) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| v_ArrVal_1109) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| v_ArrVal_1111) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| v_ArrVal_1112) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266| v_ArrVal_1114)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272|) (not (<= |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| |c_ULTIMATE.start_cstrcpy_~dst~0#1.offset|)) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268|))) is different from false [2022-11-19 07:37:08,546 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 838991838 treesize of output 838205406