./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7 --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 --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:01:44,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:01:44,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:01:44,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:01:44,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:01:44,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:01:44,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:01:44,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:01:44,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:01:44,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:01:44,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:01:44,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:01:44,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:01:44,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:01:44,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:01:44,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:01:44,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:01:44,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:01:44,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:01:44,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:01:44,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:01:44,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:01:44,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:01:44,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:01:44,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:01:44,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:01:44,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:01:44,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:01:44,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:01:44,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:01:44,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:01:44,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:01:44,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:01:44,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:01:44,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:01:44,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:01:44,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:01:44,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:01:44,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:01:44,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:01:44,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:01:44,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:01:44,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:01:44,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:01:44,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:01:44,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:01:44,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:01:44,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:01:44,931 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:01:44,931 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:01:44,931 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:01:44,932 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:01:44,932 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:01:44,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:01:44,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:01:44,933 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:01:44,933 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:01:44,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:01:44,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:01:44,934 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:01:44,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:01:44,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:01:44,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:01:44,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:01:44,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:01:44,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:01:44,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:01:44,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:01:44,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:01:44,938 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:01:44,938 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:01:44,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:01:44,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:01:44,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:01:44,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:01:44,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:01:44,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:01:44,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:01:44,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:01:44,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:01:44,940 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:01:44,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:01:44,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:01:44,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:01:44,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2021-11-25 19:01:45,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:01:45,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:01:45,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:01:45,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:01:45,287 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:01:45,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-11-25 19:01:45,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/data/8e8c43919/a90bc87e4b6441978559f9bba303d135/FLAG4105ef4db [2021-11-25 19:01:45,920 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:01:45,925 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-11-25 19:01:45,948 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/data/8e8c43919/a90bc87e4b6441978559f9bba303d135/FLAG4105ef4db [2021-11-25 19:01:46,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/data/8e8c43919/a90bc87e4b6441978559f9bba303d135 [2021-11-25 19:01:46,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:01:46,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:01:46,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:01:46,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:01:46,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:01:46,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317ca7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46, skipping insertion in model container [2021-11-25 19:01:46,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:01:46,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:01:46,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:01:46,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:01:46,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:01:46,836 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:01:46,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46 WrapperNode [2021-11-25 19:01:46,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:01:46,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:01:46,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:01:46,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:01:46,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,898 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-25 19:01:46,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:01:46,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:01:46,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:01:46,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:01:46,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:01:46,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:01:46,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:01:46,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:01:46,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (1/1) ... [2021-11-25 19:01:46,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:01:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:46,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:01:47,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:01:47,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:01:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:01:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:01:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:01:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:01:47,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:01:47,181 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:01:47,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:01:47,391 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:01:47,446 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:01:47,447 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:01:47,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:01:47 BoogieIcfgContainer [2021-11-25 19:01:47,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:01:47,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:01:47,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:01:47,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:01:47,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:01:46" (1/3) ... [2021-11-25 19:01:47,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1c2f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:01:47, skipping insertion in model container [2021-11-25 19:01:47,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:46" (2/3) ... [2021-11-25 19:01:47,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1c2f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:01:47, skipping insertion in model container [2021-11-25 19:01:47,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:01:47" (3/3) ... [2021-11-25 19:01:47,463 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2021-11-25 19:01:47,471 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:01:47,471 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-25 19:01:47,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:01:47,529 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:01:47,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-25 19:01:47,546 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) [2021-11-25 19:01:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:01:47,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:47,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:01:47,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 104379, now seen corresponding path program 1 times [2021-11-25 19:01:47,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:47,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017638154] [2021-11-25 19:01:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:47,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:47,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:47,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017638154] [2021-11-25 19:01:47,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017638154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:47,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:47,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:01:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704863800] [2021-11-25 19:01:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:01:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:01:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:01:47,778 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) [2021-11-25 19:01:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:47,851 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-25 19:01:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:01:47,854 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 [2021-11-25 19:01:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:47,861 INFO L225 Difference]: With dead ends: 22 [2021-11-25 19:01:47,861 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 19:01:47,864 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:47,868 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 9 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:47,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 19:01:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 19:01:47,902 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) [2021-11-25 19:01:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-25 19:01:47,904 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 3 [2021-11-25 19:01:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:47,905 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-25 19:01:47,905 INFO L471 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) [2021-11-25 19:01:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-25 19:01:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:01:47,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:47,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:01:47,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:01:47,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash 3236553, now seen corresponding path program 1 times [2021-11-25 19:01:47,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:47,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145343579] [2021-11-25 19:01:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:47,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:47,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145343579] [2021-11-25 19:01:47,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145343579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:47,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:47,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:01:47,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374860396] [2021-11-25 19:01:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:47,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:01:47,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:01:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:01:47,982 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) [2021-11-25 19:01:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:48,003 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-25 19:01:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:01:48,003 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 [2021-11-25 19:01:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:48,004 INFO L225 Difference]: With dead ends: 18 [2021-11-25 19:01:48,004 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:01:48,005 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:48,006 INFO L933 BasicCegarLoop]: 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 [2021-11-25 19:01:48,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:01:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:01:48,010 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) [2021-11-25 19:01:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 19:01:48,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2021-11-25 19:01:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 19:01:48,011 INFO L471 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) [2021-11-25 19:01:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 19:01:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:01:48,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:48,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:01:48,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:01:48,013 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 3236554, now seen corresponding path program 1 times [2021-11-25 19:01:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:48,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990017779] [2021-11-25 19:01:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:48,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:48,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990017779] [2021-11-25 19:01:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990017779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:48,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:01:48,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040253530] [2021-11-25 19:01:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:01:48,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:01:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:01:48,164 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:48,277 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-25 19:01:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:01:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 19:01:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:48,279 INFO L225 Difference]: With dead ends: 33 [2021-11-25 19:01:48,279 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 19:01:48,279 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:48,281 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:48,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 19:01:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2021-11-25 19:01:48,301 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) [2021-11-25 19:01:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-25 19:01:48,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2021-11-25 19:01:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:48,302 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-25 19:01:48,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:48,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-25 19:01:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:01:48,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:48,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:01:48,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:01:48,304 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 3238051, now seen corresponding path program 1 times [2021-11-25 19:01:48,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891414776] [2021-11-25 19:01:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:48,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:48,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:48,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891414776] [2021-11-25 19:01:48,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891414776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:48,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:48,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:01:48,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123310639] [2021-11-25 19:01:48,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:48,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:01:48,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:48,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:01:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:01:48,415 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:48,464 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-25 19:01:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:01:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 19:01:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:48,465 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:01:48,466 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 19:01:48,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:01:48,468 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 19:01:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 19:01:48,471 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) [2021-11-25 19:01:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 19:01:48,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 4 [2021-11-25 19:01:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:48,472 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 19:01:48,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 19:01:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:01:48,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:48,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-11-25 19:01:48,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:01:48,477 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1184601517, now seen corresponding path program 1 times [2021-11-25 19:01:48,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750484357] [2021-11-25 19:01:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:48,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:48,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:48,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750484357] [2021-11-25 19:01:48,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750484357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483474215] [2021-11-25 19:01:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:48,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:48,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:48,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:01:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:01:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:48,737 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:48,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:48,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483474215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:48,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136343123] [2021-11-25 19:01:48,959 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 19:01:48,959 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:48,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:48,973 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:48,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:49,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:49,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:01:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:49,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:49,447 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:49,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '248#(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) (< (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1)) (<= 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) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:49,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:49,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:01:49,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 19:01:49,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124519423] [2021-11-25 19:01:49,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:49,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:01:49,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:01:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:01:49,811 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:49,986 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-11-25 19:01:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:01:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:01:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:49,987 INFO L225 Difference]: With dead ends: 43 [2021-11-25 19:01:49,987 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 19:01:49,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:01:49,992 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:49,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 19:01:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 16. [2021-11-25 19:01:50,002 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) [2021-11-25 19:01:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 19:01:50,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2021-11-25 19:01:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,004 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 19:01:50,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 19:01:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:01:50,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:50,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:50,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167129, now seen corresponding path program 1 times [2021-11-25 19:01:50,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382480966] [2021-11-25 19:01:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:50,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382480966] [2021-11-25 19:01:50,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382480966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:50,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:50,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:01:50,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808863828] [2021-11-25 19:01:50,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:50,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:01:50,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:01:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:01:50,320 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) [2021-11-25 19:01:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:50,368 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-25 19:01:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:01:50,368 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 [2021-11-25 19:01:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:50,369 INFO L225 Difference]: With dead ends: 23 [2021-11-25 19:01:50,369 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 19:01:50,371 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:50,374 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:50,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 19:01:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-11-25 19:01:50,380 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) [2021-11-25 19:01:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-25 19:01:50,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-11-25 19:01:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,385 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-25 19:01:50,386 INFO L471 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) [2021-11-25 19:01:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-25 19:01:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:01:50,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:01:50,387 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167130, now seen corresponding path program 1 times [2021-11-25 19:01:50,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551786817] [2021-11-25 19:01:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:50,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:50,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551786817] [2021-11-25 19:01:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551786817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:50,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:50,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:01:50,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667534279] [2021-11-25 19:01:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:50,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:01:50,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:01:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:01:50,498 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) [2021-11-25 19:01:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:50,523 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 19:01:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:01:50,524 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 [2021-11-25 19:01:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:50,525 INFO L225 Difference]: With dead ends: 17 [2021-11-25 19:01:50,525 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:01:50,525 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:50,526 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 4 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 [2021-11-25 19:01:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:01:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 19:01:50,534 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) [2021-11-25 19:01:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 19:01:50,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 6 [2021-11-25 19:01:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,536 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 19:01:50,536 INFO L471 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) [2021-11-25 19:01:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 19:01:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:01:50,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:01:50,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524653, now seen corresponding path program 1 times [2021-11-25 19:01:50,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945520158] [2021-11-25 19:01:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:50,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945520158] [2021-11-25 19:01:50,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945520158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:50,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:50,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:01:50,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819466268] [2021-11-25 19:01:50,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:50,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:01:50,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:01:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:01:50,637 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) [2021-11-25 19:01:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:50,678 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 19:01:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:01:50,678 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 [2021-11-25 19:01:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:50,679 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:01:50,679 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:01:50,680 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:50,680 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:50,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:01:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 19:01:50,683 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) [2021-11-25 19:01:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 19:01:50,683 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2021-11-25 19:01:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,684 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 19:01:50,684 INFO L471 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) [2021-11-25 19:01:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 19:01:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:01:50,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:01:50,685 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524654, now seen corresponding path program 1 times [2021-11-25 19:01:50,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257381813] [2021-11-25 19:01:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:50,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257381813] [2021-11-25 19:01:50,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257381813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:50,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:50,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:01:50,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548396658] [2021-11-25 19:01:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:50,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:01:50,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:01:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:01:50,751 INFO L87 Difference]: Start difference. First operand 16 states and 17 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) [2021-11-25 19:01:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:50,803 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 19:01:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:01:50,804 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 [2021-11-25 19:01:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:50,804 INFO L225 Difference]: With dead ends: 18 [2021-11-25 19:01:50,804 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:01:50,805 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:50,805 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:50,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:01:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-25 19:01:50,808 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) [2021-11-25 19:01:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 19:01:50,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2021-11-25 19:01:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,808 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 19:01:50,808 INFO L471 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) [2021-11-25 19:01:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 19:01:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:01:50,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:01:50,809 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1355666300, now seen corresponding path program 1 times [2021-11-25 19:01:50,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290170100] [2021-11-25 19:01:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:50,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290170100] [2021-11-25 19:01:50,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290170100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:50,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:50,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:01:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151113657] [2021-11-25 19:01:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:50,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:01:50,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:01:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:01:50,957 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) [2021-11-25 19:01:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:50,973 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 19:01:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:01:50,973 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 [2021-11-25 19:01:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:50,974 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:01:50,974 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 19:01:50,974 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:50,975 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 7 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 [2021-11-25 19:01:50,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 19:01:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-25 19:01:50,978 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) [2021-11-25 19:01:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-25 19:01:50,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-11-25 19:01:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:50,981 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-25 19:01:50,981 INFO L471 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) [2021-11-25 19:01:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-25 19:01:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:01:50,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:50,982 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:50,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:01:50,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1355665169, now seen corresponding path program 1 times [2021-11-25 19:01:50,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:50,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116051482] [2021-11-25 19:01:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:50,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:51,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:51,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116051482] [2021-11-25 19:01:51,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116051482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:51,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:51,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:01:51,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217622653] [2021-11-25 19:01:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:51,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:01:51,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:01:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:01:51,121 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) [2021-11-25 19:01:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:51,262 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-25 19:01:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:01:51,263 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 [2021-11-25 19:01:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:51,263 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:01:51,264 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:01:51,264 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:01:51,264 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:51,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:01:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:01:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-25 19:01:51,266 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) [2021-11-25 19:01:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 19:01:51,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-25 19:01:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:51,267 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 19:01:51,267 INFO L471 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) [2021-11-25 19:01:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 19:01:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:01:51,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:51,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:51,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:01:51,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 284798392, now seen corresponding path program 1 times [2021-11-25 19:01:51,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:51,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800092820] [2021-11-25 19:01:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:51,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:51,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:51,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800092820] [2021-11-25 19:01:51,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800092820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:51,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618166326] [2021-11-25 19:01:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:51,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:51,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:51,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:51,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:01:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:51,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 19:01:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:51,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:51,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618166326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458136584] [2021-11-25 19:01:51,823 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:51,824 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:51,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:51,824 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:51,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:01:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:01:51,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:52,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:52,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,290 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:01:52,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:52,431 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:52,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:52,637 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:52,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:53,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '660#(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 [2021-11-25 19:01:53,811 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:53,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:01:53,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-25 19:01:53,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400166841] [2021-11-25 19:01:53,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:53,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:01:53,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:01:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:01:53,813 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) [2021-11-25 19:01:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:54,089 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-25 19:01:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:01:54,090 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 [2021-11-25 19:01:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:54,090 INFO L225 Difference]: With dead ends: 22 [2021-11-25 19:01:54,090 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:01:54,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:01:54,092 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:54,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 14 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:01:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-11-25 19:01:54,094 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) [2021-11-25 19:01:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 19:01:54,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2021-11-25 19:01:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 19:01:54,095 INFO L471 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) [2021-11-25 19:01:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 19:01:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:01:54,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:54,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:54,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:54,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:01:54,297 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 238815549, now seen corresponding path program 1 times [2021-11-25 19:01:54,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:54,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337294693] [2021-11-25 19:01:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:54,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:54,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:54,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337294693] [2021-11-25 19:01:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337294693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287015915] [2021-11-25 19:01:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:54,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:54,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:01:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 19:01:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:54,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287015915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500901718] [2021-11-25 19:01:54,927 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:54,928 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:54,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:54,928 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:54,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:54,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:01:55,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:55,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:55,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:55,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:55,314 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:01:55,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:55,444 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:55,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:55,613 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:55,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:55,711 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:56,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816#(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 [2021-11-25 19:01:56,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:56,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:01:56,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-11-25 19:01:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367580825] [2021-11-25 19:01:56,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:01:56,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:01:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:01:56,744 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 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) [2021-11-25 19:01:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:57,033 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-25 19:01:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:01:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:01:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:57,034 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:01:57,034 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:01:57,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:01:57,035 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:57,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 9 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:01:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-25 19:01:57,037 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) [2021-11-25 19:01:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 19:01:57,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2021-11-25 19:01:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:57,038 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 19:01:57,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 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) [2021-11-25 19:01:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 19:01:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:01:57,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:57,039 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:57,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:57,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:57,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:01:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2088173760, now seen corresponding path program 2 times [2021-11-25 19:01:57,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89747748] [2021-11-25 19:01:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:57,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:57,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89747748] [2021-11-25 19:01:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89747748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424227785] [2021-11-25 19:01:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:57,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:57,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:57,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:01:57,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:01:57,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:57,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 19:01:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:57,933 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-25 19:01:57,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:57,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:57,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_158) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:01:58,031 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_158) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:01:58,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:01:58,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:58,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:01:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 19:01:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424227785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304086691] [2021-11-25 19:01:58,237 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:58,237 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:58,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:58,237 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:58,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:58,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:01:58,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:01:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:58,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:58,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:01:58,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:58,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:58,629 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:01:58,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:58,772 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:58,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:58,930 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:01:58,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:59,040 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:00,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '995#(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 [2021-11-25 19:02:00,186 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:00,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:00,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-11-25 19:02:00,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214466184] [2021-11-25 19:02:00,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:00,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:02:00,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:02:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=941, Unknown=2, NotChecked=126, Total=1190 [2021-11-25 19:02:00,187 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2021-11-25 19:02:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:00,493 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-25 19:02:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:02:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 19:02:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:00,494 INFO L225 Difference]: With dead ends: 31 [2021-11-25 19:02:00,494 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:02:00,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=1303, Unknown=2, NotChecked=150, Total=1640 [2021-11-25 19:02:00,495 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:00,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2021-11-25 19:02:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:02:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-25 19:02:00,497 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) [2021-11-25 19:02:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-25 19:02:00,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-11-25 19:02:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:00,498 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-25 19:02:00,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2021-11-25 19:02:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-25 19:02:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:02:00,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:00,499 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:02:00,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:00,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:02:00,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash 980812489, now seen corresponding path program 3 times [2021-11-25 19:02:00,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695798526] [2021-11-25 19:02:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:00,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:00,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:00,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695798526] [2021-11-25 19:02:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695798526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274220829] [2021-11-25 19:02:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:00,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:00,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:00,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:02:00,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 19:02:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:00,963 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:02:00,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:00,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:01,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:02:01,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:01,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:01,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2021-11-25 19:02:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:01,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:01,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:01,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:01,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:01,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:02:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:02,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274220829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850971640] [2021-11-25 19:02:02,050 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:02,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:02,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:02,050 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:02,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:02,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:02,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:02,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:02,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:02,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:02,402 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:02,534 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:02,675 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:02,748 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:03,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1203#(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 [2021-11-25 19:02:03,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:03,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:03,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2021-11-25 19:02:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276787893] [2021-11-25 19:02:03,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:03,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 19:02:03,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 19:02:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:02:03,865 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 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) [2021-11-25 19:02:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:04,500 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-25 19:02:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:02:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:02:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:04,501 INFO L225 Difference]: With dead ends: 27 [2021-11-25 19:02:04,501 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:02:04,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=2389, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:02:04,503 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:04,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 14 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 153 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-11-25 19:02:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:02:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-25 19:02:04,505 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) [2021-11-25 19:02:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-25 19:02:04,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-11-25 19:02:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:04,506 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-25 19:02:04,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 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) [2021-11-25 19:02:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-25 19:02:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:02:04,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:04,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:02:04,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:04,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:02:04,716 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 340416076, now seen corresponding path program 2 times [2021-11-25 19:02:04,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627119526] [2021-11-25 19:02:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:04,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:04,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627119526] [2021-11-25 19:02:04,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627119526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23251462] [2021-11-25 19:02:04,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:04,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:04,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:02:04,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:02:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-25 19:02:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:04,991 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:02:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:02:05,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:02:05,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23251462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149659051] [2021-11-25 19:02:05,740 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:05,741 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:05,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:05,741 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:05,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:05,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:05,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:05,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:06,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:06,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:06,087 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:06,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:06,204 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:06,361 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:06,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:06,434 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:07,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(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 [2021-11-25 19:02:07,414 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:07,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:07,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-11-25 19:02:07,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308400284] [2021-11-25 19:02:07,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:07,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:02:07,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:02:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:02:07,416 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:08,158 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-11-25 19:02:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:02:08,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 19:02:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:08,159 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:02:08,160 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 19:02:08,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:02:08,161 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:08,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 20 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 268 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2021-11-25 19:02:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 19:02:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-25 19:02:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-25 19:02:08,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-11-25 19:02:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:08,165 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-25 19:02:08,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-25 19:02:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:02:08,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:08,167 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:02:08,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 19:02:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:02:08,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 917529937, now seen corresponding path program 4 times [2021-11-25 19:02:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:08,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587306991] [2021-11-25 19:02:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:08,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:08,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587306991] [2021-11-25 19:02:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587306991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297686197] [2021-11-25 19:02:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:02:08,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:08,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:08,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:02:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 19:02:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:08,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:08,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:08,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:09,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:09,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:09,131 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_268 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_268) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:02:09,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_268 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_268) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:02:09,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int)) (v_ArrVal_268 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_267) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_268) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)))) is different from false [2021-11-25 19:02:09,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:09,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:09,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:09,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:02:09,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:02:09,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297686197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:09,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075416673] [2021-11-25 19:02:09,454 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:09,454 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:09,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:09,454 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:09,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:09,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:09,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:09,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:09,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:09,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:09,780 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:09,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:09,907 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:10,110 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:10,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:10,203 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:11,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1683#(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 [2021-11-25 19:02:11,674 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:11,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:11,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-11-25 19:02:11,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544748799] [2021-11-25 19:02:11,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:11,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 19:02:11,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 19:02:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1352, Unknown=3, NotChecked=228, Total=1722 [2021-11-25 19:02:11,677 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:12,071 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-25 19:02:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:02:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:02:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:12,073 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:02:12,073 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:02:12,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=199, Invalid=1880, Unknown=3, NotChecked=270, Total=2352 [2021-11-25 19:02:12,074 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:12,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 76 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 237 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-11-25 19:02:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:02:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-25 19:02:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-25 19:02:12,078 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2021-11-25 19:02:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:12,078 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-25 19:02:12,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-25 19:02:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:02:12,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:12,080 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 19:02:12,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:02:12,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:02:12,292 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:12,293 INFO L85 PathProgramCache]: Analyzing trace with hash -503448422, now seen corresponding path program 5 times [2021-11-25 19:02:12,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:12,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534941782] [2021-11-25 19:02:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:12,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:12,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:12,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534941782] [2021-11-25 19:02:12,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534941782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:12,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086401028] [2021-11-25 19:02:12,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:12,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:12,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:12,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:02:12,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:02:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 19:02:12,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:12,595 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:02:12,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:13,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086401028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:13,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145218945] [2021-11-25 19:02:13,294 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:13,294 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:13,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:13,295 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:13,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:13,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:13,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:13,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:13,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:13,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:13,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:13,638 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:13,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:13,764 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:13,943 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:13,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:14,043 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:15,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1964#(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 [2021-11-25 19:02:15,399 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:15,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:15,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-11-25 19:02:15,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754644304] [2021-11-25 19:02:15,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:15,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 19:02:15,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 19:02:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:02:15,401 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:15,841 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-25 19:02:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:02:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 19:02:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:15,842 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:02:15,842 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 19:02:15,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=380, Invalid=2170, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 19:02:15,843 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 142 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:15,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 22 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 19:02:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-25 19:02:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 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) [2021-11-25 19:02:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-25 19:02:15,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2021-11-25 19:02:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:15,848 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-25 19:02:15,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-25 19:02:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:02:15,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:15,849 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 19:02:15,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:16,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:02:16,053 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2095771998, now seen corresponding path program 6 times [2021-11-25 19:02:16,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:16,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152759883] [2021-11-25 19:02:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:16,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:16,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152759883] [2021-11-25 19:02:16,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152759883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119776760] [2021-11-25 19:02:16,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:16,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:16,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:16,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:02:16,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:16,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-25 19:02:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:16,558 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:02:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:16,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:17,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 19:02:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:17,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:22,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:22,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:22,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:22,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 [2021-11-25 19:02:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 28 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119776760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422105323] [2021-11-25 19:02:22,747 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:22,747 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:22,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:22,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:22,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:22,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:23,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:23,085 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:23,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:23,189 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:23,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:23,320 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:23,368 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:24,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2273#(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 [2021-11-25 19:02:24,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:24,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:24,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 48 [2021-11-25 19:02:24,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868030862] [2021-11-25 19:02:24,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:24,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 19:02:24,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 19:02:24,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2939, Unknown=36, NotChecked=0, Total=3192 [2021-11-25 19:02:24,506 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 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) [2021-11-25 19:02:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:25,426 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-11-25 19:02:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:02:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 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 28 [2021-11-25 19:02:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:25,427 INFO L225 Difference]: With dead ends: 55 [2021-11-25 19:02:25,427 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 19:02:25,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=479, Invalid=5185, Unknown=36, NotChecked=0, Total=5700 [2021-11-25 19:02:25,430 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:25,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2021-11-25 19:02:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 19:02:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-25 19:02:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 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) [2021-11-25 19:02:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-25 19:02:25,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2021-11-25 19:02:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:25,443 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-25 19:02:25,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 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) [2021-11-25 19:02:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-25 19:02:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:02:25,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:25,447 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 19:02:25,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:25,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:25,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1556329685, now seen corresponding path program 7 times [2021-11-25 19:02:25,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392699683] [2021-11-25 19:02:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:25,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:25,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392699683] [2021-11-25 19:02:25,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392699683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627362657] [2021-11-25 19:02:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:02:25,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:25,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:25,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:02:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 19:02:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:26,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:26,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:26,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627362657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:26,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408315624] [2021-11-25 19:02:26,466 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:26,466 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:26,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:26,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:26,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:26,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:26,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:26,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:26,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:26,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:26,778 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:26,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:26,885 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:27,027 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:27,083 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:28,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2616#(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 [2021-11-25 19:02:28,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:28,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:28,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2021-11-25 19:02:28,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828609232] [2021-11-25 19:02:28,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:28,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:02:28,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:02:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:02:28,033 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:28,602 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-25 19:02:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:02:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 19:02:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:28,603 INFO L225 Difference]: With dead ends: 38 [2021-11-25 19:02:28,603 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 19:02:28,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:02:28,605 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 177 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:28,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 35 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:02:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 19:02:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-25 19:02:28,608 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) [2021-11-25 19:02:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-25 19:02:28,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 30 [2021-11-25 19:02:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:28,609 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-25 19:02:28,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-25 19:02:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:02:28,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:28,610 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 19:02:28,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:28,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:28,812 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash -931681101, now seen corresponding path program 8 times [2021-11-25 19:02:28,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:28,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616840925] [2021-11-25 19:02:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:28,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:29,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616840925] [2021-11-25 19:02:29,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616840925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641423806] [2021-11-25 19:02:29,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:29,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:29,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:29,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:02:29,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:02:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-25 19:02:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:29,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:30,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:30,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:30,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:30,528 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:02:30,538 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:02:30,547 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int)) (v_ArrVal_462 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_461) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:02:30,557 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:02:30,566 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 (Array Int Int)) (v_ArrVal_462 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_460) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:02:30,577 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:02:30,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_459 (Array Int Int)) (v_ArrVal_462 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_459) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:02:30,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_462) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:02:30,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:30,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:30,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:02:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-11-25 19:02:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641423806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342503575] [2021-11-25 19:02:30,911 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:30,911 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:30,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:30,912 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:30,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:30,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:31,211 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:31,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:31,319 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:31,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:31,560 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:33,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2984#(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 [2021-11-25 19:02:33,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:33,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:33,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 56 [2021-11-25 19:02:33,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270116937] [2021-11-25 19:02:33,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:33,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 19:02:33,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 19:02:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3008, Unknown=8, NotChecked=936, Total=4160 [2021-11-25 19:02:33,219 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:33,856 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-25 19:02:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 19:02:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 19:02:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:33,857 INFO L225 Difference]: With dead ends: 61 [2021-11-25 19:02:33,857 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 19:02:33,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=275, Invalid=4039, Unknown=8, NotChecked=1080, Total=5402 [2021-11-25 19:02:33,859 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:33,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 134 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2021-11-25 19:02:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 19:02:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-25 19:02:33,861 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) [2021-11-25 19:02:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-25 19:02:33,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-11-25 19:02:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:33,862 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-25 19:02:33,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-25 19:02:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:02:33,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:33,864 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 19:02:33,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:34,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:34,084 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash 880254588, now seen corresponding path program 9 times [2021-11-25 19:02:34,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646331042] [2021-11-25 19:02:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:34,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:34,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646331042] [2021-11-25 19:02:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646331042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087303640] [2021-11-25 19:02:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:34,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:34,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:02:34,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:34,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 19:02:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:34,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:34,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:02:34,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:34,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:35,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:35,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:02:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:36,288 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_123| Int)) (or (<= (+ 6 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_123|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_123|) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_123| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_526) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 4 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_123|)) 0))) is different from false [2021-11-25 19:02:36,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:36,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:36,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:36,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:02:36,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 19:02:37,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087303640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:37,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201220135] [2021-11-25 19:02:37,084 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:37,084 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:37,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:37,084 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:37,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:37,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:37,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:37,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:37,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:37,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:37,334 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:37,458 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:37,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:37,614 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:37,695 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:39,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3384#(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 [2021-11-25 19:02:39,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:39,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:39,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 55 [2021-11-25 19:02:39,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211373515] [2021-11-25 19:02:39,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:39,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 19:02:39,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 19:02:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3668, Unknown=3, NotChecked=124, Total=4160 [2021-11-25 19:02:39,598 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:40,500 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|))) (and (<= |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4) (<= (+ |c_ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |c_#length| |c_ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= 5 .cse0) (not (= |c_ULTIMATE.start_main_~nondetArea~0#1.base| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ (- 1) .cse0)) 0) (<= (+ 5 |c_ULTIMATE.start_main_~nondetString~0#1.offset|) .cse1) (= |c_ULTIMATE.start_main_~length2~0#1| .cse1) (or (and (<= (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3) .cse0) (<= 0 .cse2)) (forall ((v_ArrVal_526 (Array Int Int)) (v_ArrVal_525 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_525) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_526) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0))) (<= 4 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) (not (= |c_ULTIMATE.start_cstrcpy_~src~0#1.base| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|)) (<= 0 |c_ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= .cse2 .cse0) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= 6 |c_ULTIMATE.start_main_~length2~0#1|))) is different from false [2021-11-25 19:02:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:41,141 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-11-25 19:02:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:02:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2021-11-25 19:02:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:41,144 INFO L225 Difference]: With dead ends: 47 [2021-11-25 19:02:41,144 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:02:41,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=751, Invalid=5887, Unknown=12, NotChecked=322, Total=6972 [2021-11-25 19:02:41,146 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:41,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 75 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 528 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2021-11-25 19:02:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:02:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-25 19:02:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-25 19:02:41,150 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 36 [2021-11-25 19:02:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:41,150 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-25 19:02:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-25 19:02:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:02:41,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:41,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 19:02:41,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:41,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 19:02:41,356 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1518088441, now seen corresponding path program 3 times [2021-11-25 19:02:41,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98549117] [2021-11-25 19:02:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:41,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:41,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98549117] [2021-11-25 19:02:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98549117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659409027] [2021-11-25 19:02:41,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:41,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:41,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:41,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:02:41,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 19:02:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:02:42,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:02:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659409027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67015017] [2021-11-25 19:02:43,191 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:43,191 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:43,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:43,191 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:43,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:43,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:43,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:43,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:43,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:43,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:43,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:43,484 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:43,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:43,577 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:43,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:43,692 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:43,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:43,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:45,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3785#(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 [2021-11-25 19:02:45,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:45,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:45,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 38 [2021-11-25 19:02:45,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695908067] [2021-11-25 19:02:45,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:45,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 19:02:45,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 19:02:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:02:45,035 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 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) [2021-11-25 19:02:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:47,239 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-25 19:02:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 19:02:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 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 37 [2021-11-25 19:02:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:47,240 INFO L225 Difference]: With dead ends: 67 [2021-11-25 19:02:47,240 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 19:02:47,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=891, Invalid=5429, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 19:02:47,243 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:47,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 74 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 650 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2021-11-25 19:02:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 19:02:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-11-25 19:02:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-25 19:02:47,246 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 37 [2021-11-25 19:02:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-25 19:02:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 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) [2021-11-25 19:02:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-25 19:02:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 19:02:47,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:47,249 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 19:02:47,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:47,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 19:02:47,456 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:47,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1987476620, now seen corresponding path program 10 times [2021-11-25 19:02:47,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:47,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880612395] [2021-11-25 19:02:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:47,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 81 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:47,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:47,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880612395] [2021-11-25 19:02:47,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880612395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:47,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759528186] [2021-11-25 19:02:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:02:47,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:47,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:47,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:02:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:47,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-25 19:02:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:47,875 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:02:47,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:48,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:48,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759528186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:48,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501380699] [2021-11-25 19:02:48,588 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:48,588 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:48,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:48,589 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:48,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:48,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:48,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:02:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:48,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:48,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:48,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:48,858 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:48,947 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:48,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:49,165 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:49,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:49,243 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:50,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4288#(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 [2021-11-25 19:02:50,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:50,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:50,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2021-11-25 19:02:50,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693255319] [2021-11-25 19:02:50,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:50,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 19:02:50,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 19:02:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:02:50,655 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:51,195 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-11-25 19:02:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:02:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 19:02:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:51,197 INFO L225 Difference]: With dead ends: 93 [2021-11-25 19:02:51,197 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 19:02:51,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=694, Invalid=3466, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 19:02:51,199 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:51,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 60 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:02:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 19:02:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-25 19:02:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-11-25 19:02:51,203 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 44 [2021-11-25 19:02:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-11-25 19:02:51,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-11-25 19:02:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 19:02:51,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:51,205 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-25 19:02:51,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:51,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 19:02:51,406 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1670219541, now seen corresponding path program 11 times [2021-11-25 19:02:51,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:51,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338340235] [2021-11-25 19:02:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:51,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:52,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338340235] [2021-11-25 19:02:52,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338340235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715235028] [2021-11-25 19:02:52,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:52,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:52,159 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:02:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:02:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 174 conjunts are in the unsatisfiable core [2021-11-25 19:02:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:52,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:53,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:53,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:53,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:53,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:02:53,948 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:02:53,955 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_722 (Array Int Int)) (v_ArrVal_723 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_722) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)))) is different from false [2021-11-25 19:02:53,963 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:02:53,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int)) (v_ArrVal_723 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_721) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:02:53,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:02:53,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int)) (v_ArrVal_720 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_720) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:02:54,001 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:02:54,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int)) (v_ArrVal_719 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_719) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:02:54,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:02:54,026 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int)) (v_ArrVal_718 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_718) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:02:54,034 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:02:54,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:02:54,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:02:54,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2021-11-25 19:02:54,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715235028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862823431] [2021-11-25 19:02:54,508 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:02:54,508 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:54,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:54,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:54,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:02:54,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:54,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:02:54,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:54,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:54,774 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:02:54,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:54,880 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:54,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:54,994 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:02:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:55,048 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:56,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4831#(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 [2021-11-25 19:02:56,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:56,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:56,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 26] total 76 [2021-11-25 19:02:56,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596990382] [2021-11-25 19:02:56,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:56,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-25 19:02:56,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-25 19:02:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5024, Unknown=12, NotChecked=1836, Total=7140 [2021-11-25 19:02:56,287 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 76 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:57,916 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-11-25 19:02:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 19:02:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 76 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-11-25 19:02:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:57,917 INFO L225 Difference]: With dead ends: 97 [2021-11-25 19:02:57,917 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 19:02:57,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 12 IntricatePredicates, 5 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=421, Invalid=8357, Unknown=12, NotChecked=2340, Total=11130 [2021-11-25 19:02:57,919 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 274 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 772 Invalid, 0 Unknown, 584 Unchecked, 0.4s Time] [2021-11-25 19:02:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 19:02:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-25 19:02:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-11-25 19:02:57,922 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 46 [2021-11-25 19:02:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:57,923 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-11-25 19:02:57,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 76 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-11-25 19:02:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:02:57,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:57,924 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 19:02:57,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 19:02:58,136 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:02:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1728844638, now seen corresponding path program 12 times [2021-11-25 19:02:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919391891] [2021-11-25 19:02:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:58,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919391891] [2021-11-25 19:02:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919391891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000317885] [2021-11-25 19:02:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:58,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:58,486 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:58,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:02:58,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-25 19:02:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:02:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:02:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:02:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:02:59,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:59,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:02:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:01,152 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_804 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_195| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_804) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 6 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_195|)) 0) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_195| 0) (<= (+ 8 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_195|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_195|))) is different from false [2021-11-25 19:03:01,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:01,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:03:01,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:03:01,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 49 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-25 19:03:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000317885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:02,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060826640] [2021-11-25 19:03:02,269 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:02,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:02,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:02,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:02,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:03:02,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:02,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:02,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:02,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:02,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:02,564 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:02,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:02,661 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:02,845 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:02,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:02,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:04,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5406#(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 [2021-11-25 19:03:04,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:04,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:04,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27, 27] total 71 [2021-11-25 19:03:04,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215516647] [2021-11-25 19:03:04,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:04,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-25 19:03:04,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-25 19:03:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=5758, Unknown=5, NotChecked=156, Total=6480 [2021-11-25 19:03:04,819 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:07,340 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-11-25 19:03:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:03:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.0) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-25 19:03:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:07,341 INFO L225 Difference]: With dead ends: 67 [2021-11-25 19:03:07,341 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 19:03:07,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1365, Invalid=9731, Unknown=38, NotChecked=208, Total=11342 [2021-11-25 19:03:07,343 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 159 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:07,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 33 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 475 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2021-11-25 19:03:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 19:03:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-25 19:03:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-25 19:03:07,346 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 48 [2021-11-25 19:03:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:07,347 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-25 19:03:07,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.0) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-25 19:03:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:03:07,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:07,349 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 19:03:07,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:07,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 19:03:07,564 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1144983698, now seen corresponding path program 13 times [2021-11-25 19:03:07,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:07,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656337596] [2021-11-25 19:03:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:07,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 139 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:07,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656337596] [2021-11-25 19:03:07,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656337596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867264264] [2021-11-25 19:03:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:03:07,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:07,913 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:07,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 19:03:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:08,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-25 19:03:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:08,051 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:08,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 147 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 146 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:09,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867264264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:09,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865811221] [2021-11-25 19:03:09,085 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:09,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:09,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:09,085 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:09,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:09,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:09,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:09,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:03:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:09,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:09,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:09,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:09,325 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:09,432 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:09,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:09,590 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:09,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:11,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5990#(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 [2021-11-25 19:03:11,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:11,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:11,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2021-11-25 19:03:11,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994646159] [2021-11-25 19:03:11,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:11,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 19:03:11,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 19:03:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3076, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 19:03:11,188 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:11,893 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2021-11-25 19:03:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 19:03:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 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 56 [2021-11-25 19:03:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:11,894 INFO L225 Difference]: With dead ends: 105 [2021-11-25 19:03:11,894 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 19:03:11,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1056, Invalid=5106, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 19:03:11,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:11,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 115 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:03:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 19:03:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-25 19:03:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-25 19:03:11,899 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 56 [2021-11-25 19:03:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:11,899 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-25 19:03:11,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-25 19:03:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:03:11,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:11,901 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 19:03:11,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-25 19:03:12,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:12,104 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2135460745, now seen corresponding path program 14 times [2021-11-25 19:03:12,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563863850] [2021-11-25 19:03:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:12,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:13,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563863850] [2021-11-25 19:03:13,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563863850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961605116] [2021-11-25 19:03:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:03:13,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:13,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:13,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:03:13,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-25 19:03:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:03:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 210 conjunts are in the unsatisfiable core [2021-11-25 19:03:13,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:14,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:14,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:14,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:16,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:16,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:16,089 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:03:16,096 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:03:16,104 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int)) (v_ArrVal_976 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_976) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:03:16,112 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:03:16,119 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_975 (Array Int Int)) (v_ArrVal_977 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_975) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:03:16,127 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:03:16,134 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_974 (Array Int Int)) (v_ArrVal_977 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_974) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:03:16,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:03:16,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int)) (v_ArrVal_973 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_973) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:03:16,157 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:03:16,163 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int)) (v_ArrVal_972 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_972) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:03:16,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:03:16,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int)) (v_ArrVal_971 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_971) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:03:16,185 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:03:16,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int)) (v_ArrVal_970 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_970) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:03:16,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_977) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:03:16,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:03:16,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:16,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:03:16,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 143 not checked. [2021-11-25 19:03:16,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961605116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:16,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688871536] [2021-11-25 19:03:16,789 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:16,790 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:16,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:16,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:16,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:16,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:16,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:16,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:16,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:16,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:16,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:17,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:17,083 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:17,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,179 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:17,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,337 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,432 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:19,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6649#(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 [2021-11-25 19:03:19,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:19,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:19,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32, 32] total 96 [2021-11-25 19:03:19,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187675985] [2021-11-25 19:03:19,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:19,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 19:03:19,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 19:03:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=7552, Unknown=16, NotChecked=3024, Total=10920 [2021-11-25 19:03:19,309 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 96 states, 96 states have (on average 1.6770833333333333) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:21,397 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-11-25 19:03:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:03:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6770833333333333) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 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 58 [2021-11-25 19:03:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:21,398 INFO L225 Difference]: With dead ends: 109 [2021-11-25 19:03:21,398 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 19:03:21,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 16 IntricatePredicates, 12 DeprecatedPredicates, 4089 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=543, Invalid=13311, Unknown=16, NotChecked=3952, Total=17822 [2021-11-25 19:03:21,400 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:21,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 346 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 609 Invalid, 0 Unknown, 587 Unchecked, 0.3s Time] [2021-11-25 19:03:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 19:03:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-25 19:03:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 70 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) [2021-11-25 19:03:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-25 19:03:21,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 58 [2021-11-25 19:03:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:21,404 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-25 19:03:21,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6770833333333333) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-25 19:03:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:03:21,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:21,408 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 19:03:21,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:21,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 19:03:21,612 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash -501163200, now seen corresponding path program 15 times [2021-11-25 19:03:21,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:21,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563351194] [2021-11-25 19:03:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:21,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:22,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563351194] [2021-11-25 19:03:22,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563351194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680433061] [2021-11-25 19:03:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:03:22,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:22,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:22,084 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:22,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 19:03:22,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:03:22,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:03:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-25 19:03:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:22,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:03:22,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:23,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:24,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:03:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 72 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:24,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:26,034 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1076 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_264| Int)) (or (<= (+ 10 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_264|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_264|) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_264| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1076) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 8 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_264|)) 0))) is different from false [2021-11-25 19:03:26,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:26,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:03:26,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:03:26,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 81 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:03:27,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680433061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:27,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409763206] [2021-11-25 19:03:27,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:27,525 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:27,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:27,526 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:27,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:27,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:27,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:03:27,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:27,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:27,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:27,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:27,808 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:27,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:27,907 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:27,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:28,048 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:28,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:30,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7341#(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 [2021-11-25 19:03:30,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:30,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:30,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33, 33] total 87 [2021-11-25 19:03:30,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210930172] [2021-11-25 19:03:30,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:30,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-25 19:03:30,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-25 19:03:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=8312, Unknown=8, NotChecked=188, Total=9312 [2021-11-25 19:03:30,243 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 88 states, 87 states have (on average 2.045977011494253) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:33,769 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-11-25 19:03:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 19:03:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.045977011494253) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 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 60 [2021-11-25 19:03:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:33,770 INFO L225 Difference]: With dead ends: 71 [2021-11-25 19:03:33,770 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 19:03:33,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 108 SyntacticMatches, 12 SemanticMatches, 123 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1965, Invalid=13263, Unknown=28, NotChecked=244, Total=15500 [2021-11-25 19:03:33,772 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 209 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 712 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:33,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 142 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1116 Invalid, 0 Unknown, 712 Unchecked, 0.6s Time] [2021-11-25 19:03:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 19:03:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-25 19:03:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-11-25 19:03:33,775 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 60 [2021-11-25 19:03:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:33,776 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-11-25 19:03:33,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.045977011494253) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-11-25 19:03:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 19:03:33,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:33,777 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 19:03:33,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:33,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 19:03:33,980 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash -108481200, now seen corresponding path program 16 times [2021-11-25 19:03:33,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:33,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311578280] [2021-11-25 19:03:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:33,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 213 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:34,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311578280] [2021-11-25 19:03:34,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311578280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507703686] [2021-11-25 19:03:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:03:34,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:34,461 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 19:03:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 19:03:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:34,659 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 223 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 222 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:36,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507703686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:36,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553565317] [2021-11-25 19:03:36,055 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:36,055 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:36,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:36,056 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:36,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:36,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:36,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:03:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:36,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:36,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:36,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:36,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:36,302 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:36,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:36,405 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:36,555 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:36,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:36,618 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:38,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8025#(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 [2021-11-25 19:03:38,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:38,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:38,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2021-11-25 19:03:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451342675] [2021-11-25 19:03:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:38,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-25 19:03:38,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-25 19:03:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4220, Unknown=0, NotChecked=0, Total=4830 [2021-11-25 19:03:38,309 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:39,569 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-11-25 19:03:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-25 19:03:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 states have internal predecessors, (153), 0 states have call successors, (0), 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 68 [2021-11-25 19:03:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:39,570 INFO L225 Difference]: With dead ends: 117 [2021-11-25 19:03:39,570 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 19:03:39,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1674, Invalid=8628, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 19:03:39,571 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:39,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 125 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:03:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 19:03:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-25 19:03:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 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) [2021-11-25 19:03:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-25 19:03:39,574 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2021-11-25 19:03:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:39,574 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-25 19:03:39,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-25 19:03:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 19:03:39,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:39,575 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 19:03:39,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:39,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:39,775 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1920660697, now seen corresponding path program 17 times [2021-11-25 19:03:39,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375145138] [2021-11-25 19:03:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:39,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:41,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:41,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375145138] [2021-11-25 19:03:41,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375145138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:41,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817234567] [2021-11-25 19:03:41,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:03:41,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:41,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:03:42,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 19:03:42,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:03:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 199 conjunts are in the unsatisfiable core [2021-11-25 19:03:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:43,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:43,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:03:43,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:03:43,668 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int)) (v_ArrVal_1283 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1283) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:03:43,681 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:03:43,691 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int)) (v_ArrVal_1282 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1282) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:03:43,701 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:03:43,711 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int)) (v_ArrVal_1281 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1281) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:03:43,721 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:03:43,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1280 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1280) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:03:43,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:03:43,745 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1279 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1279) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:03:43,758 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)))) is different from false [2021-11-25 19:03:43,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1278 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1278) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:03:43,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:03:43,794 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1277 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1277) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:03:43,803 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:03:43,812 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1276 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1276) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)))) is different from false [2021-11-25 19:03:43,822 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:03:43,830 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1275 (Array Int Int)) (v_ArrVal_1284 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1275) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:03:43,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:03:43,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:03:43,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:43,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:03:43,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 219 not checked. [2021-11-25 19:03:44,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817234567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208262320] [2021-11-25 19:03:44,637 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:44,637 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:44,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:44,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:44,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:44,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:44,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:44,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:44,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:44,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:44,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:44,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:44,904 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:44,987 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:45,143 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:45,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:45,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:47,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8806#(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 [2021-11-25 19:03:47,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:47,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:47,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38, 38] total 104 [2021-11-25 19:03:47,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931349191] [2021-11-25 19:03:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-25 19:03:47,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-25 19:03:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=8279, Unknown=20, NotChecked=4020, Total=12656 [2021-11-25 19:03:47,216 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 104 states, 104 states have (on average 1.7019230769230769) internal successors, (177), 104 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:49,996 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-11-25 19:03:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:03:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.7019230769230769) internal successors, (177), 104 states have internal predecessors, (177), 0 states have call successors, (0), 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 70 [2021-11-25 19:03:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:49,997 INFO L225 Difference]: With dead ends: 121 [2021-11-25 19:03:49,998 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 19:03:49,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 151 SyntacticMatches, 19 SemanticMatches, 133 ConstructedPredicates, 20 IntricatePredicates, 0 DeprecatedPredicates, 4101 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=475, Invalid=12695, Unknown=20, NotChecked=4900, Total=18090 [2021-11-25 19:03:49,999 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1281 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:49,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 594 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2302 Invalid, 0 Unknown, 1281 Unchecked, 0.9s Time] [2021-11-25 19:03:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 19:03:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-25 19:03:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-25 19:03:50,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2021-11-25 19:03:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:50,002 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-25 19:03:50,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.7019230769230769) internal successors, (177), 104 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-25 19:03:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:03:50,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:50,003 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 19:03:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:50,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:50,208 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:03:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2010871330, now seen corresponding path program 18 times [2021-11-25 19:03:50,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:50,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726276055] [2021-11-25 19:03:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:50,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 81 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:50,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726276055] [2021-11-25 19:03:50,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726276055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874125178] [2021-11-25 19:03:50,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:03:50,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:50,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:50,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 19:03:50,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:03:50,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:03:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-25 19:03:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:03:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:51,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:03:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:52,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:53,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:03:53,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:53,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:03:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 110 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:53,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:55,827 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_345| Int) (v_ArrVal_1401 (Array Int Int))) (or (<= (+ 12 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_345|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_345|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1401) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 10 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_345|)) 0) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_345| 0))) is different from false [2021-11-25 19:03:55,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:03:55,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:55,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:03:55,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 121 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-25 19:03:57,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874125178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605594589] [2021-11-25 19:03:57,837 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:03:57,837 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:57,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:57,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:57,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:57,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:03:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:57,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:57,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:03:58,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:58,090 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:03:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:58,181 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:58,286 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:03:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:58,336 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:00,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9610#(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 [2021-11-25 19:04:00,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:00,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 39, 39] total 103 [2021-11-25 19:04:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693557437] [2021-11-25 19:04:00,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-25 19:04:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-25 19:04:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=11328, Unknown=12, NotChecked=220, Total=12656 [2021-11-25 19:04:00,137 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:04,085 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|))) (and (<= 11 .cse0) (<= 11 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) (or (not (= |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| .cse0)) (= |c_ULTIMATE.start_cstrcpy_#t~mem4#1| 0)) (<= |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11) (<= .cse1 .cse0) (or (and (<= 0 .cse1) (<= (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2) .cse0)) (forall ((v_ArrVal_1401 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1401) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0))))) is different from false [2021-11-25 19:04:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:04,410 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-11-25 19:04:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 19:04:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 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 72 [2021-11-25 19:04:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:04,411 INFO L225 Difference]: With dead ends: 83 [2021-11-25 19:04:04,411 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 19:04:04,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 150 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2966, Invalid=19331, Unknown=61, NotChecked=594, Total=22952 [2021-11-25 19:04:04,413 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 202 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:04,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 115 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1166 Invalid, 0 Unknown, 510 Unchecked, 0.6s Time] [2021-11-25 19:04:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 19:04:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-11-25 19:04:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-11-25 19:04:04,416 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 72 [2021-11-25 19:04:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:04,416 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-11-25 19:04:04,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-11-25 19:04:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:04:04,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:04,417 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 19:04:04,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:04,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:04,617 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2087498221, now seen corresponding path program 4 times [2021-11-25 19:04:04,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:04,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056066192] [2021-11-25 19:04:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:04,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 81 proven. 293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:05,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056066192] [2021-11-25 19:04:05,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056066192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675111152] [2021-11-25 19:04:05,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:04:05,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:05,180 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:05,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:04:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:05,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-25 19:04:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:05,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 100 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 121 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675111152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955889986] [2021-11-25 19:04:08,112 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:04:08,113 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:08,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:08,113 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:08,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:04:08,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:04:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:08,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:08,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:08,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:08,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:08,377 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:04:08,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:08,468 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:08,571 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:08,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:08,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:10,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10382#(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 [2021-11-25 19:04:10,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:10,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:10,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 80 [2021-11-25 19:04:10,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769087114] [2021-11-25 19:04:10,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-25 19:04:10,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-25 19:04:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=7291, Unknown=0, NotChecked=0, Total=8010 [2021-11-25 19:04:10,057 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 81 states, 80 states have (on average 2.7125) internal successors, (217), 81 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:12,325 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-25 19:04:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 19:04:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.7125) internal successors, (217), 81 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-25 19:04:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:12,326 INFO L225 Difference]: With dead ends: 82 [2021-11-25 19:04:12,326 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 19:04:12,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2450, Invalid=13300, Unknown=0, NotChecked=0, Total=15750 [2021-11-25 19:04:12,328 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:12,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 219 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:04:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 19:04:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-25 19:04:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-25 19:04:12,330 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 73 [2021-11-25 19:04:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:12,330 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-25 19:04:12,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.7125) internal successors, (217), 81 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-25 19:04:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:04:12,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:12,331 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 19:04:12,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:12,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-25 19:04:12,531 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash -834273013, now seen corresponding path program 5 times [2021-11-25 19:04:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265808662] [2021-11-25 19:04:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 265 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:13,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:13,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265808662] [2021-11-25 19:04:13,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265808662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:13,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256291513] [2021-11-25 19:04:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:04:13,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:13,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:13,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:04:15,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 19:04:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-25 19:04:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:15,199 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:04:15,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 288 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 288 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:17,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256291513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409671780] [2021-11-25 19:04:17,167 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:04:17,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:17,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:17,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:17,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:04:17,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:17,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:17,448 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:04:17,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:17,541 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:17,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:17,694 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:17,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:17,755 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:19,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11154#(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 [2021-11-25 19:04:19,423 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:19,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:19,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 71 [2021-11-25 19:04:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364728200] [2021-11-25 19:04:19,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:19,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 19:04:19,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 19:04:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=5490, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 19:04:19,425 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 71 states, 71 states have (on average 2.5211267605633805) internal successors, (179), 71 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:20,653 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-11-25 19:04:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 19:04:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.5211267605633805) internal successors, (179), 71 states have internal predecessors, (179), 0 states have call successors, (0), 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 77 [2021-11-25 19:04:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:20,655 INFO L225 Difference]: With dead ends: 136 [2021-11-25 19:04:20,655 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 19:04:20,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1746, Invalid=9596, Unknown=0, NotChecked=0, Total=11342 [2021-11-25 19:04:20,656 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:20,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 119 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:04:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 19:04:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-25 19:04:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-25 19:04:20,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 77 [2021-11-25 19:04:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:20,659 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-25 19:04:20,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.5211267605633805) internal successors, (179), 71 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-25 19:04:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:04:20,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:20,663 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2021-11-25 19:04:20,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-25 19:04:20,872 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash 330836898, now seen corresponding path program 6 times [2021-11-25 19:04:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:20,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851453385] [2021-11-25 19:04:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:20,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 100 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:21,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851453385] [2021-11-25 19:04:21,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851453385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701141043] [2021-11-25 19:04:21,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:04:21,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:21,588 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:21,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 19:04:21,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:04:21,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 206 conjunts are in the unsatisfiable core [2021-11-25 19:04:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:21,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:04:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-25 19:04:23,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-25 19:04:24,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701141043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:24,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185123625] [2021-11-25 19:04:24,922 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:04:24,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:24,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:24,922 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:24,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:24,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:04:24,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:04:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:25,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:25,188 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:04:25,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:25,298 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:25,456 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:25,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:25,527 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:27,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11972#(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 [2021-11-25 19:04:27,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:27,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:27,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 66 [2021-11-25 19:04:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105700549] [2021-11-25 19:04:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:27,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-25 19:04:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-25 19:04:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=5170, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 19:04:27,502 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:35,717 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-11-25 19:04:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-25 19:04:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 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 79 [2021-11-25 19:04:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:35,718 INFO L225 Difference]: With dead ends: 145 [2021-11-25 19:04:35,718 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 19:04:35,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3551, Invalid=18799, Unknown=0, NotChecked=0, Total=22350 [2021-11-25 19:04:35,719 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:35,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 337 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2041 Invalid, 0 Unknown, 2 Unchecked, 1.0s Time] [2021-11-25 19:04:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 19:04:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-11-25 19:04:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2021-11-25 19:04:35,723 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 79 [2021-11-25 19:04:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:35,724 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2021-11-25 19:04:35,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2021-11-25 19:04:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:04:35,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:35,725 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-11-25 19:04:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:35,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 19:04:35,950 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -987920325, now seen corresponding path program 19 times [2021-11-25 19:04:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719685723] [2021-11-25 19:04:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:35,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:37,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719685723] [2021-11-25 19:04:37,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719685723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:37,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102504091] [2021-11-25 19:04:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:04:37,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:37,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:37,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 19:04:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 220 conjunts are in the unsatisfiable core [2021-11-25 19:04:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:37,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:38,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:39,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:39,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|))) is different from false [2021-11-25 19:04:39,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:04:39,793 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1857 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1857) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:04:39,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:04:39,807 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1856 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1856) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:04:39,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:04:39,821 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1855 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1855) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:04:39,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)))) is different from false [2021-11-25 19:04:39,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1854 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1854) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:04:39,871 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:04:39,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1853 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1853) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:04:39,889 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:04:39,898 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1852 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1852) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:04:39,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:04:39,915 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1851 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1851) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:04:39,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:04:39,934 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1850 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1850) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)))) is different from false [2021-11-25 19:04:39,943 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)))) is different from false [2021-11-25 19:04:39,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1849 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1849) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:04:39,957 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)))) is different from false [2021-11-25 19:04:39,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1848 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1848) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:04:39,971 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:04:39,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1847 (Array Int Int)) (v_ArrVal_1858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_1847) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:04:39,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_1858) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:04:39,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:04:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:04:39,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:04:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:04:39,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 311 not checked. [2021-11-25 19:04:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102504091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293565849] [2021-11-25 19:04:40,332 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:04:40,332 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:40,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:40,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:40,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:04:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:04:40,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:40,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:40,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:40,620 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:04:40,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:40,711 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:40,843 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:40,907 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:42,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13003#(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 [2021-11-25 19:04:42,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:42,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:42,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 44, 44] total 109 [2021-11-25 19:04:42,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830015854] [2021-11-25 19:04:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-25 19:04:42,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:42,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-25 19:04:42,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8478, Unknown=24, NotChecked=4968, Total=13806 [2021-11-25 19:04:42,468 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 109 states, 109 states have (on average 1.7889908256880733) internal successors, (195), 109 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:46,006 INFO L93 Difference]: Finished difference Result 189 states and 202 transitions. [2021-11-25 19:04:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-25 19:04:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.7889908256880733) internal successors, (195), 109 states have internal predecessors, (195), 0 states have call successors, (0), 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 82 [2021-11-25 19:04:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:46,007 INFO L225 Difference]: With dead ends: 189 [2021-11-25 19:04:46,007 INFO L226 Difference]: Without dead ends: 136 [2021-11-25 19:04:46,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 191 SyntacticMatches, 26 SemanticMatches, 142 ConstructedPredicates, 24 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=490, Invalid=13862, Unknown=24, NotChecked=6216, Total=20592 [2021-11-25 19:04:46,008 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 4379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1804 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:46,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 632 Invalid, 4379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2536 Invalid, 0 Unknown, 1804 Unchecked, 1.0s Time] [2021-11-25 19:04:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-25 19:04:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-11-25 19:04:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.112781954887218) internal successors, (148), 134 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2021-11-25 19:04:46,013 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 82 [2021-11-25 19:04:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:46,013 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2021-11-25 19:04:46,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.7889908256880733) internal successors, (195), 109 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2021-11-25 19:04:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:04:46,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:46,014 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2021-11-25 19:04:46,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 19:04:46,232 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1004444668, now seen corresponding path program 20 times [2021-11-25 19:04:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469719189] [2021-11-25 19:04:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 121 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:46,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:46,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469719189] [2021-11-25 19:04:46,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469719189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:46,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659413004] [2021-11-25 19:04:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:04:46,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:46,911 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:46,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 19:04:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-25 19:04:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-25 19:04:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:50,287 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:04:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:51,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 169 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659413004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096495938] [2021-11-25 19:04:53,202 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:04:53,202 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:53,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:53,203 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:53,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:53,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:04:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:04:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:53,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:53,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:04:53,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:53,508 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:04:53,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:53,586 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:53,715 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:04:53,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:53,789 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:55,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14011#(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 [2021-11-25 19:04:55,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:55,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:04:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2021-11-25 19:04:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11721518] [2021-11-25 19:04:55,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:55,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-25 19:04:55,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-25 19:04:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=8934, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:04:55,104 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand has 92 states, 91 states have (on average 2.7472527472527473) internal successors, (250), 92 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:56,885 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-11-25 19:04:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 19:04:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.7472527472527473) internal successors, (250), 92 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-25 19:04:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:56,887 INFO L225 Difference]: With dead ends: 135 [2021-11-25 19:04:56,887 INFO L226 Difference]: Without dead ends: 135 [2021-11-25 19:04:56,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4806 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3000, Invalid=14030, Unknown=0, NotChecked=0, Total=17030 [2021-11-25 19:04:56,888 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 411 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 155 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:04:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-25 19:04:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-25 19:04:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.105263157894737) internal successors, (147), 134 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) [2021-11-25 19:04:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2021-11-25 19:04:56,891 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 84 [2021-11-25 19:04:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:56,892 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2021-11-25 19:04:56,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.7472527472527473) internal successors, (250), 92 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:04:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2021-11-25 19:04:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 19:04:56,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:56,893 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-25 19:04:56,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 19:04:57,108 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:04:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1292022028, now seen corresponding path program 21 times [2021-11-25 19:04:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005534029] [2021-11-25 19:04:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:57,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 28 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:59,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:59,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005534029] [2021-11-25 19:04:59,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005534029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:59,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238749190] [2021-11-25 19:04:59,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:04:59,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:59,107 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:59,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 19:04:59,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:04:59,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 195 conjunts are in the unsatisfiable core [2021-11-25 19:04:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:04:59,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:00,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:00,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:01,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:01,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:01,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:02,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:02,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:03,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:03,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 19:05:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 293 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:03,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:35,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:05:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:05:35,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:05:35,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 [2021-11-25 19:05:35,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 166 proven. 238 refuted. 157 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:37,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238749190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781055690] [2021-11-25 19:05:37,489 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:05:37,489 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:37,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:37,490 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:37,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:37,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:05:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:05:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:37,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:37,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:37,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:37,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:37,761 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:05:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:37,855 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:05:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:37,991 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:05:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:38,059 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:05:40,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15020#(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 [2021-11-25 19:05:40,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:40,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:05:40,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47, 47] total 148 [2021-11-25 19:05:40,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217142169] [2021-11-25 19:05:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:40,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-25 19:05:40,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-25 19:05:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=22769, Unknown=326, NotChecked=0, Total=24492 [2021-11-25 19:05:40,711 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 148 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 148 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:05:46,146 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2021-11-25 19:05:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-25 19:05:46,146 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 148 states have internal predecessors, (254), 0 states have call successors, (0), 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 88 [2021-11-25 19:05:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:05:46,147 INFO L225 Difference]: With dead ends: 195 [2021-11-25 19:05:46,147 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 19:05:46,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11393 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=3184, Invalid=42930, Unknown=326, NotChecked=0, Total=46440 [2021-11-25 19:05:46,149 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:05:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 452 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1459 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2021-11-25 19:05:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 19:05:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-25 19:05:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1037037037037036) internal successors, (149), 136 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-11-25 19:05:46,153 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 88 [2021-11-25 19:05:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:05:46,153 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-11-25 19:05:46,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 148 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-11-25 19:05:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 19:05:46,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:05:46,154 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2021-11-25 19:05:46,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-25 19:05:46,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:46,364 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:05:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:05:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash 993710613, now seen corresponding path program 22 times [2021-11-25 19:05:46,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:05:46,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43915852] [2021-11-25 19:05:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:46,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:05:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:05:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 144 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:47,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:05:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43915852] [2021-11-25 19:05:47,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43915852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:05:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239228812] [2021-11-25 19:05:47,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:05:47,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:05:47,140 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:05:47,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 19:05:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:05:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-25 19:05:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:05:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:48,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:49,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:49,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239228812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576748548] [2021-11-25 19:05:49,151 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:05:49,151 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:49,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:49,152 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:49,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:05:49,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:05:49,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:49,407 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:05:49,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:49,486 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:05:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:49,615 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:05:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:05:49,661 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:05:51,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16086#(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 [2021-11-25 19:05:51,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:51,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:05:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2021-11-25 19:05:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682945371] [2021-11-25 19:05:51,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:51,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-25 19:05:51,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-25 19:05:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=5363, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:05:51,054 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 68 states, 67 states have (on average 2.716417910447761) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:05:53,609 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-11-25 19:05:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:05:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.716417910447761) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 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 90 [2021-11-25 19:05:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:05:53,610 INFO L225 Difference]: With dead ends: 137 [2021-11-25 19:05:53,610 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 19:05:53,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2533, Invalid=12229, Unknown=0, NotChecked=0, Total=14762 [2021-11-25 19:05:53,611 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 462 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:05:53,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 249 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:05:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 19:05:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-25 19:05:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-11-25 19:05:53,615 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 90 [2021-11-25 19:05:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:05:53,616 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-11-25 19:05:53,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.716417910447761) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:05:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-11-25 19:05:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 19:05:53,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:05:53,617 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-25 19:05:53,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 19:05:53,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 19:05:53,817 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:05:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:05:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1633374563, now seen corresponding path program 23 times [2021-11-25 19:05:53,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:05:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953631058] [2021-11-25 19:05:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:53,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:05:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:05:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:56,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:05:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953631058] [2021-11-25 19:05:56,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953631058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:05:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114543787] [2021-11-25 19:05:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:05:56,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:05:56,162 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:05:56,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 19:06:01,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 19:06:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:01,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 258 conjunts are in the unsatisfiable core [2021-11-25 19:06:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:03,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:04,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:04,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:04,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:04,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:04,373 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:06:04,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:06:04,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int)) (v_ArrVal_2392 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2392) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:06:04,405 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:06:04,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:06:04,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:06:04,439 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2390 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2390) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:06:04,448 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:06:04,457 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:06:04,466 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:06:04,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2388 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2388) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:06:04,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:06:04,492 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2387 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2387) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:06:04,501 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:06:04,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2386 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2386) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:06:04,515 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:06:04,525 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2385 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2385) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:06:04,532 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:06:04,538 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2384 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2384) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:06:04,545 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:06:04,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2383 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2383) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:06:04,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:06:04,565 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2382 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2382) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:06:04,572 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:06:04,578 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int)) (v_ArrVal_2381 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2381) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)))) is different from false [2021-11-25 19:06:04,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:06:04,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2380 (Array Int Int)) (v_ArrVal_2393 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2380) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:06:04,615 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2393 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2393) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:06:04,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:04,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:06:04,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:04,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:06:04,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 419 not checked. [2021-11-25 19:06:05,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114543787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812795968] [2021-11-25 19:06:05,011 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:06:05,012 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:05,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:05,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:05,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:05,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:06:05,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:06:05,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:05,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:05,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:05,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:05,256 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:06:05,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:05,345 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:05,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:05,456 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:05,523 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:07,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17145#(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 [2021-11-25 19:06:07,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:07,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:06:07,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 50, 50] total 128 [2021-11-25 19:06:07,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631829322] [2021-11-25 19:06:07,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:07,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-25 19:06:07,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-25 19:06:07,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=11465, Unknown=28, NotChecked=6748, Total=18632 [2021-11-25 19:06:07,363 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 128 states, 128 states have (on average 1.7890625) internal successors, (229), 128 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:11,752 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-11-25 19:06:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-25 19:06:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.7890625) internal successors, (229), 128 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-25 19:06:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:11,754 INFO L225 Difference]: With dead ends: 201 [2021-11-25 19:06:11,754 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 19:06:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 206 SyntacticMatches, 29 SemanticMatches, 166 ConstructedPredicates, 28 IntricatePredicates, 1 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=577, Invalid=18967, Unknown=28, NotChecked=8484, Total=28056 [2021-11-25 19:06:11,756 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:11,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 804 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2071 Invalid, 0 Unknown, 1308 Unchecked, 0.8s Time] [2021-11-25 19:06:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 19:06:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-11-25 19:06:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.094890510948905) internal successors, (150), 138 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-11-25 19:06:11,760 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 94 [2021-11-25 19:06:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:11,760 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-11-25 19:06:11,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.7890625) internal successors, (229), 128 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-11-25 19:06:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 19:06:11,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:11,762 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-25 19:06:11,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:11,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 19:06:11,964 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:06:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1936186138, now seen corresponding path program 24 times [2021-11-25 19:06:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:11,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132828067] [2021-11-25 19:06:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:11,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 169 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:12,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:12,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132828067] [2021-11-25 19:06:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132828067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:12,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132471004] [2021-11-25 19:06:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:06:12,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:12,863 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:12,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 19:06:13,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:06:13,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:13,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 248 conjunts are in the unsatisfiable core [2021-11-25 19:06:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:13,192 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:06:13,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:14,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:06:14,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:14,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:15,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:16,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:06:16,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:16,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:06:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 210 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:17,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:18,988 WARN L838 $PredicateComparison]: unable to prove that (or (and (<= 0 (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) (<= (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|))) (forall ((v_ArrVal_2547 (Array Int Int)) (v_ArrVal_2541 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2541) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2547) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0))) is different from false [2021-11-25 19:06:20,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2547 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_628| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2547) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 14 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_628|)) 0) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_628|) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_628| 0) (<= (+ 16 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_628|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)))) is different from false [2021-11-25 19:06:20,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:06:20,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:06:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 225 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 44 not checked. [2021-11-25 19:06:24,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132471004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062972083] [2021-11-25 19:06:24,055 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:06:24,055 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:24,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:24,056 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:24,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:24,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:06:24,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:06:24,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:24,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:24,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:24,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:24,331 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:06:24,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:24,415 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:24,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:24,533 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:24,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:24,607 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:26,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18288#(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 [2021-11-25 19:06:26,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:26,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:06:26,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 51, 51] total 135 [2021-11-25 19:06:26,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980907467] [2021-11-25 19:06:26,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:26,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-25 19:06:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-25 19:06:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1695, Invalid=18606, Unknown=13, NotChecked=566, Total=20880 [2021-11-25 19:06:26,900 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 136 states, 135 states have (on average 2.1185185185185187) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:34,372 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|))) (and (<= 15 .cse0) (or (not (= |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| .cse0)) (= |c_ULTIMATE.start_cstrcpy_#t~mem4#1| 0)) (<= 15 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) (or (forall ((v_ArrVal_2547 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2547) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|))) (and (<= 0 .cse1) (<= (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2) .cse0))) (<= |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15) (<= .cse1 .cse0))) is different from false [2021-11-25 19:06:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:34,794 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2021-11-25 19:06:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 19:06:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 2.1185185185185187) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 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 96 [2021-11-25 19:06:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:34,810 INFO L225 Difference]: With dead ends: 139 [2021-11-25 19:06:34,810 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 19:06:34,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 180 SyntacticMatches, 15 SemanticMatches, 192 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7580 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=4787, Invalid=31441, Unknown=74, NotChecked=1140, Total=37442 [2021-11-25 19:06:34,813 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 335 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1911 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:34,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 243 Invalid, 4225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1985 Invalid, 0 Unknown, 1911 Unchecked, 1.0s Time] [2021-11-25 19:06:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 19:06:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-25 19:06:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 138 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2021-11-25 19:06:34,818 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 96 [2021-11-25 19:06:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2021-11-25 19:06:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 2.1185185185185187) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2021-11-25 19:06:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 19:06:34,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:34,819 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 15, 15, 1, 1, 1, 1, 1] [2021-11-25 19:06:34,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:35,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:35,032 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:06:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash -452527882, now seen corresponding path program 25 times [2021-11-25 19:06:35,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722129881] [2021-11-25 19:06:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:35,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 531 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:35,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722129881] [2021-11-25 19:06:35,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722129881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162832926] [2021-11-25 19:06:35,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:06:35,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:35,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:35,782 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:35,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 19:06:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-25 19:06:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:36,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:06:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 547 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:37,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 546 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:38,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162832926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999070352] [2021-11-25 19:06:38,744 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:06:38,745 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:38,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:38,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:38,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:38,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:38,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:06:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:06:38,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:38,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:38,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:38,993 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:06:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:39,078 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:39,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:39,220 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:39,310 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:41,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19399#(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 [2021-11-25 19:06:41,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:41,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:06:41,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2021-11-25 19:06:41,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36831088] [2021-11-25 19:06:41,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:41,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-25 19:06:41,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-25 19:06:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=8576, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 19:06:41,116 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 91 states, 91 states have (on average 2.6043956043956045) internal successors, (237), 91 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:43,600 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2021-11-25 19:06:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-25 19:06:43,601 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.6043956043956045) internal successors, (237), 91 states have internal predecessors, (237), 0 states have call successors, (0), 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 104 [2021-11-25 19:06:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:43,602 INFO L225 Difference]: With dead ends: 209 [2021-11-25 19:06:43,602 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 19:06:43,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6041 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3729, Invalid=18621, Unknown=0, NotChecked=0, Total=22350 [2021-11-25 19:06:43,604 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:43,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 244 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:06:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 19:06:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-11-25 19:06:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.079136690647482) internal successors, (150), 140 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2021-11-25 19:06:43,609 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 104 [2021-11-25 19:06:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:43,609 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2021-11-25 19:06:43,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.6043956043956045) internal successors, (237), 91 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2021-11-25 19:06:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 19:06:43,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:43,610 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2021-11-25 19:06:43,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:43,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:43,810 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:06:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash 517335039, now seen corresponding path program 26 times [2021-11-25 19:06:43,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:43,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534371881] [2021-11-25 19:06:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:43,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:46,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534371881] [2021-11-25 19:06:46,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534371881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123216750] [2021-11-25 19:06:46,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:06:46,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:46,590 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:46,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 19:06:53,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-25 19:06:53,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 278 conjunts are in the unsatisfiable core [2021-11-25 19:06:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:53,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:54,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:54,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:56,206 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:06:56,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:06:56,220 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2855 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2855) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:06:56,228 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:06:56,235 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2854 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2854) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:06:56,242 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:06:56,249 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2853 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2853) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:06:56,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:06:56,274 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2852 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2852) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:06:56,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:06:56,288 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2851 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2851) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:06:56,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:06:56,302 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2850 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2850) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:06:56,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:06:56,316 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2849 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2849) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:06:56,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:06:56,330 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2848 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2848) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:06:56,338 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:06:56,344 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2847 (Array Int Int)) (v_ArrVal_2856 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2847) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:06:56,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:06:56,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2846 (Array Int Int)) (v_ArrVal_2856 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2846) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)))) is different from false [2021-11-25 19:06:56,366 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:06:56,373 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2845 (Array Int Int)) (v_ArrVal_2856 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2845) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:06:56,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)))) is different from false [2021-11-25 19:06:56,387 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2844 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2844) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:06:56,394 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:06:56,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2843 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2843) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:06:56,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:06:56,415 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2842 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2842) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:06:56,422 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:06:56,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2841 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_2841) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:06:56,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:06:56,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:56,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:06:56,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:06:56,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:06:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 543 not checked. [2021-11-25 19:06:56,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123216750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:56,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773811406] [2021-11-25 19:06:56,878 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:06:56,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:56,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:56,879 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:56,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:56,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:06:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:06:56,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:06:57,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,151 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:06:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:57,259 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:57,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:57,384 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:06:57,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:06:57,437 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:59,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20629#(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 [2021-11-25 19:06:59,378 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:59,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:06:59,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 56, 56] total 141 [2021-11-25 19:06:59,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731956825] [2021-11-25 19:06:59,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:59,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-25 19:06:59,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-25 19:06:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=13478, Unknown=32, NotChecked=8416, Total=22350 [2021-11-25 19:06:59,382 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 141 states, 141 states have (on average 1.8085106382978724) internal successors, (255), 141 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:04,748 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2021-11-25 19:07:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-25 19:07:04,749 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.8085106382978724) internal successors, (255), 141 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-25 19:07:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:04,750 INFO L225 Difference]: With dead ends: 213 [2021-11-25 19:07:04,750 INFO L226 Difference]: Without dead ends: 144 [2021-11-25 19:07:04,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 237 SyntacticMatches, 35 SemanticMatches, 181 ConstructedPredicates, 32 IntricatePredicates, 0 DeprecatedPredicates, 6070 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=618, Invalid=22128, Unknown=32, NotChecked=10528, Total=33306 [2021-11-25 19:07:04,753 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1697 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:04,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 997 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2701 Invalid, 0 Unknown, 1697 Unchecked, 1.1s Time] [2021-11-25 19:07:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-25 19:07:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-25 19:07:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2021-11-25 19:07:04,757 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 106 [2021-11-25 19:07:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:04,757 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2021-11-25 19:07:04,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.8085106382978724) internal successors, (255), 141 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2021-11-25 19:07:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 19:07:04,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:04,759 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 19:07:04,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:04,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:04,964 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:07:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash 547698888, now seen corresponding path program 27 times [2021-11-25 19:07:04,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134421950] [2021-11-25 19:07:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:04,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 225 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:05,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134421950] [2021-11-25 19:07:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134421950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744466945] [2021-11-25 19:07:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:07:05,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:05,971 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 19:07:06,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:07:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:07:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 272 conjunts are in the unsatisfiable core [2021-11-25 19:07:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:07:06,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:07:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:07,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:07,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:08,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:08,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:09,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:09,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:09,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:10,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:10,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:07:10,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:07:10,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:07:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 272 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:10,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:07:15,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_745| Int) (v_ArrVal_3027 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3027) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 16 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_745|)) 0) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_745|) (<= (+ 18 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_745|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_745| 0))) is different from false [2021-11-25 19:07:15,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:07:15,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:07:15,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:07:15,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:07:15,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 289 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2021-11-25 19:07:19,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744466945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:07:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246054909] [2021-11-25 19:07:19,527 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:07:19,527 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:07:19,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:07:19,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:07:19,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:07:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:07:19,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:07:19,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:19,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:19,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:19,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:19,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:19,789 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:07:19,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:19,887 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:07:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:20,062 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:07:20,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:20,125 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:07:23,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21886#(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 [2021-11-25 19:07:23,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:07:23,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:07:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 57, 57] total 151 [2021-11-25 19:07:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042073469] [2021-11-25 19:07:23,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:07:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-25 19:07:23,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-25 19:07:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2124, Invalid=23302, Unknown=18, NotChecked=316, Total=25760 [2021-11-25 19:07:23,200 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 152 states, 151 states have (on average 2.1324503311258276) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:30,905 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2021-11-25 19:07:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 19:07:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 2.1324503311258276) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 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 108 [2021-11-25 19:07:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:30,906 INFO L225 Difference]: With dead ends: 143 [2021-11-25 19:07:30,907 INFO L226 Difference]: Without dead ends: 143 [2021-11-25 19:07:30,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 219 SyntacticMatches, 10 SemanticMatches, 206 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8797 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=5413, Invalid=37189, Unknown=44, NotChecked=410, Total=43056 [2021-11-25 19:07:30,910 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 398 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1870 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:30,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 398 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1730 Invalid, 0 Unknown, 1870 Unchecked, 0.9s Time] [2021-11-25 19:07:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-25 19:07:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-25 19:07:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 142 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2021-11-25 19:07:30,914 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 108 [2021-11-25 19:07:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:30,914 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2021-11-25 19:07:30,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 151 states have (on average 2.1324503311258276) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2021-11-25 19:07:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:07:30,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:30,915 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 19:07:30,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:31,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-25 19:07:31,124 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:07:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 347802328, now seen corresponding path program 28 times [2021-11-25 19:07:31,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944134079] [2021-11-25 19:07:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:31,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 669 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:32,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:32,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944134079] [2021-11-25 19:07:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944134079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:32,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131184388] [2021-11-25 19:07:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:07:32,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:32,027 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:32,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 19:07:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-25 19:07:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:32,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:07:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 687 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:07:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 686 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:35,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131184388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:07:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039486154] [2021-11-25 19:07:35,611 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:07:35,611 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:07:35,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:07:35,611 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:07:35,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:07:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:35,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:07:35,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:35,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:35,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:35,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:07:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:35,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:35,908 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:07:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:36,030 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:07:36,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:36,170 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:07:36,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:07:36,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:07:38,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23093#(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 [2021-11-25 19:07:38,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:07:38,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:07:38,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2021-11-25 19:07:38,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085054829] [2021-11-25 19:07:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:07:38,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-25 19:07:38,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-25 19:07:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1779, Invalid=10211, Unknown=0, NotChecked=0, Total=11990 [2021-11-25 19:07:38,255 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 101 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:40,109 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2021-11-25 19:07:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-25 19:07:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-25 19:07:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:40,110 INFO L225 Difference]: With dead ends: 221 [2021-11-25 19:07:40,110 INFO L226 Difference]: Without dead ends: 146 [2021-11-25 19:07:40,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5622 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4066, Invalid=17986, Unknown=0, NotChecked=0, Total=22052 [2021-11-25 19:07:40,112 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:40,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 201 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-25 19:07:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-25 19:07:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.062937062937063) internal successors, (152), 144 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 152 transitions. [2021-11-25 19:07:40,116 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 152 transitions. Word has length 116 [2021-11-25 19:07:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:40,116 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 152 transitions. [2021-11-25 19:07:40,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 152 transitions. [2021-11-25 19:07:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-25 19:07:40,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:40,117 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2021-11-25 19:07:40,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:40,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-25 19:07:40,332 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:07:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1086933919, now seen corresponding path program 29 times [2021-11-25 19:07:40,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:40,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317573712] [2021-11-25 19:07:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:40,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:43,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317573712] [2021-11-25 19:07:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317573712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483363938] [2021-11-25 19:07:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:07:43,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:43,678 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:43,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 19:08:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-25 19:08:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:08:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 310 conjunts are in the unsatisfiable core [2021-11-25 19:08:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:01,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:05,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:05,292 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:08:05,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:08:05,306 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3369 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3369) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:08:05,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:08:05,321 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3368 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3368) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:08:05,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:08:05,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3367 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3367) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)))) is different from false [2021-11-25 19:08:05,362 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:08:05,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3366 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3366) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:08:05,382 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:08:05,391 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3365 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3365) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:08:05,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:08:05,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3364 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3364) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:08:05,419 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:08:05,428 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3363 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3363) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:08:05,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:08:05,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3362 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3362) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:08:05,453 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:08:05,461 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3361 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3361) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:08:05,469 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:08:05,476 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3360 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3360) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:08:05,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:08:05,491 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:08:05,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:08:05,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3358 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3358) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:08:05,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:08:05,521 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3357 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3357) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:08:05,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:08:05,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3356 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3356) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:08:05,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:08:05,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3355 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3355) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:08:05,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:08:05,566 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3354 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3354) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:08:05,574 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:08:05,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3353 (Array Int Int)) (v_ArrVal_3370 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3353) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:08:05,589 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3370 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3370) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 18)) 0)) is different from false [2021-11-25 19:08:05,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:08:05,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:08:05,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:08:05,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:08:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 683 not checked. [2021-11-25 19:08:06,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483363938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:06,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351399225] [2021-11-25 19:08:06,082 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:08:06,082 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:08:06,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:08:06,082 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:08:06,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:08:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:08:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:08:06,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:08:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:06,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:06,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:06,349 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:08:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:06,444 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:06,564 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:06,615 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:08:08,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24405#(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 [2021-11-25 19:08:08,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:08:08,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:08:08,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 62, 62] total 157 [2021-11-25 19:08:08,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369238751] [2021-11-25 19:08:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:08,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2021-11-25 19:08:08,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:08:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-11-25 19:08:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=16410, Unknown=36, NotChecked=10476, Total=27390 [2021-11-25 19:08:08,728 INFO L87 Difference]: Start difference. First operand 145 states and 152 transitions. Second operand has 157 states, 157 states have (on average 1.8152866242038217) internal successors, (285), 157 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:16,984 INFO L93 Difference]: Finished difference Result 225 states and 232 transitions. [2021-11-25 19:08:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-25 19:08:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.8152866242038217) internal successors, (285), 157 states have internal predecessors, (285), 0 states have call successors, (0), 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 118 [2021-11-25 19:08:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:16,985 INFO L225 Difference]: With dead ends: 225 [2021-11-25 19:08:16,985 INFO L226 Difference]: Without dead ends: 148 [2021-11-25 19:08:16,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 276 SyntacticMatches, 45 SemanticMatches, 202 ConstructedPredicates, 36 IntricatePredicates, 0 DeprecatedPredicates, 7821 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=688, Invalid=27476, Unknown=36, NotChecked=13212, Total=41412 [2021-11-25 19:08:16,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 5985 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 9303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 5985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3259 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:16,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1144 Invalid, 9303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 5985 Invalid, 0 Unknown, 3259 Unchecked, 2.4s Time] [2021-11-25 19:08:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-25 19:08:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-25 19:08:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.0620689655172413) internal successors, (154), 146 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 154 transitions. [2021-11-25 19:08:16,993 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 154 transitions. Word has length 118 [2021-11-25 19:08:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:16,993 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 154 transitions. [2021-11-25 19:08:16,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.8152866242038217) internal successors, (285), 157 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 154 transitions. [2021-11-25 19:08:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-25 19:08:16,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:16,995 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 19:08:17,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-25 19:08:17,200 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:08:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1183965270, now seen corresponding path program 30 times [2021-11-25 19:08:17,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:08:17,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859738699] [2021-11-25 19:08:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:17,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:08:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:18,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:08:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859738699] [2021-11-25 19:08:18,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859738699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:08:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602085611] [2021-11-25 19:08:18,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:08:18,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:18,283 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:18,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 19:08:18,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:08:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:08:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 300 conjunts are in the unsatisfiable core [2021-11-25 19:08:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:08:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:20,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:08:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:20,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:20,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:21,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:21,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:21,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:21,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:22,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:22,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:22,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:23,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:23,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:23,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:08:24,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:08:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:08:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 342 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:24,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:30,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_874| Int) (v_ArrVal_3560 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3560) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 18 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_874|)) 0) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_874| 0) (<= (+ 20 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_874|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_874|))) is different from false [2021-11-25 19:08:30,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:08:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:08:30,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:08:30,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:08:30,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 361 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 19 not checked. [2021-11-25 19:08:34,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602085611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580739059] [2021-11-25 19:08:34,791 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:08:34,791 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:08:34,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:08:34,792 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:08:34,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:08:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:08:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:08:34,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:34,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:35,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:35,044 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:08:35,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:35,141 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:35,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:35,275 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:35,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:35,367 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:08:38,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25797#(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 [2021-11-25 19:08:38,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:08:38,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:08:38,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 63, 63] total 167 [2021-11-25 19:08:38,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582469185] [2021-11-25 19:08:38,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:38,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2021-11-25 19:08:38,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:08:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-11-25 19:08:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2572, Invalid=28210, Unknown=22, NotChecked=348, Total=31152 [2021-11-25 19:08:38,799 INFO L87 Difference]: Start difference. First operand 147 states and 154 transitions. Second operand has 168 states, 167 states have (on average 2.143712574850299) internal successors, (358), 168 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:50,721 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-11-25 19:08:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-25 19:08:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 2.143712574850299) internal successors, (358), 168 states have internal predecessors, (358), 0 states have call successors, (0), 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 120 [2021-11-25 19:08:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:50,723 INFO L225 Difference]: With dead ends: 147 [2021-11-25 19:08:50,723 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 19:08:50,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 229 SyntacticMatches, 16 SemanticMatches, 237 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11464 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=7548, Invalid=48751, Unknown=111, NotChecked=472, Total=56882 [2021-11-25 19:08:50,727 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 521 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 5067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1970 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:50,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 387 Invalid, 5067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2690 Invalid, 0 Unknown, 1970 Unchecked, 1.4s Time] [2021-11-25 19:08:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 19:08:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-25 19:08:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 146 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2021-11-25 19:08:50,731 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 120 [2021-11-25 19:08:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:50,732 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2021-11-25 19:08:50,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 2.143712574850299) internal successors, (358), 168 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2021-11-25 19:08:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 19:08:50,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:50,733 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 19:08:50,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:50,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-25 19:08:50,950 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:08:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash -978849862, now seen corresponding path program 31 times [2021-11-25 19:08:50,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:08:50,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540965816] [2021-11-25 19:08:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:50,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:08:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 823 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:51,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:08:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540965816] [2021-11-25 19:08:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540965816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:08:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142273833] [2021-11-25 19:08:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:08:51,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:51,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:51,975 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 19:08:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-25 19:08:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:52,307 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:08:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 843 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:54,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 842 proven. 401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142273833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75315971] [2021-11-25 19:08:56,231 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:08:56,231 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:08:56,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:08:56,232 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:08:56,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:08:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:08:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:08:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:08:56,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:56,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:56,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:56,474 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:08:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:56,557 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:56,722 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:08:56,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:08:56,795 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:08:58,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27116#(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 [2021-11-25 19:08:58,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:08:58,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:08:58,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2021-11-25 19:08:58,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306005358] [2021-11-25 19:08:58,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:58,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-25 19:08:58,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:08:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-25 19:08:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1960, Invalid=12320, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 19:08:58,891 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand has 111 states, 111 states have (on average 2.6396396396396398) internal successors, (293), 111 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:02,210 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-11-25 19:09:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 19:09:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.6396396396396398) internal successors, (293), 111 states have internal predecessors, (293), 0 states have call successors, (0), 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 128 [2021-11-25 19:09:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:02,212 INFO L225 Difference]: With dead ends: 233 [2021-11-25 19:09:02,212 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 19:09:02,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8897 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5559, Invalid=27383, Unknown=0, NotChecked=0, Total=32942 [2021-11-25 19:09:02,214 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:02,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 230 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:09:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 19:09:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-11-25 19:09:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0476190476190477) internal successors, (154), 148 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2021-11-25 19:09:02,219 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 128 [2021-11-25 19:09:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:02,219 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2021-11-25 19:09:02,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.6396396396396398) internal successors, (293), 111 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2021-11-25 19:09:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:09:02,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:02,220 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-25 19:09:02,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:02,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-25 19:09:02,429 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:09:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1291021373, now seen corresponding path program 32 times [2021-11-25 19:09:02,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855957532] [2021-11-25 19:09:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:02,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:06,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855957532] [2021-11-25 19:09:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855957532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:09:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729545482] [2021-11-25 19:09:06,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:09:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:09:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:06,456 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:09:06,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-25 19:10:17,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-25 19:10:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 442 conjunts are in the unsatisfiable core [2021-11-25 19:10:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:19,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:19,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:20,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:20,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:20,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:21,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:21,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:22,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:22,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:23,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:24,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:25,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:25,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:25,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:25,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:25,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:10:25,606 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)))) is different from false [2021-11-25 19:10:25,613 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:10:25,622 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:10:25,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3935 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3935) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:10:25,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:10:25,645 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3934 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3934) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:10:25,653 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:10:25,659 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3933 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3933) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:10:25,667 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)))) is different from false [2021-11-25 19:10:25,675 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3932 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3932) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:10:25,683 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:10:25,690 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3931 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3931) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:10:25,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:10:25,706 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3930 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3930) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:10:25,714 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:10:25,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3929 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3929) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:10:25,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:10:25,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3928 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3928) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:10:25,745 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:10:25,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3927 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3927) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:10:25,760 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:10:25,767 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3926 (Array Int Int)) (v_ArrVal_3937 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3926) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:10:25,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:10:25,783 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3925 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3925) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:10:25,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:10:25,798 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3924 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3924) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:10:25,807 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:10:25,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3923 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3923) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:10:25,823 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:10:25,831 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3922 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3922) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:10:25,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:10:25,846 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3921 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3921) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:10:25,854 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:10:25,861 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3920 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3920) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:10:25,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 18)) 0)) is different from false [2021-11-25 19:10:25,876 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3919 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3919) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 18)) 0)) is different from false [2021-11-25 19:10:25,885 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:10:25,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int)) (v_ArrVal_3918 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_3918) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)))) is different from false [2021-11-25 19:10:25,900 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_3937) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 20)) 0)) is different from false [2021-11-25 19:10:25,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:10:25,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:25,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:10:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 401 refuted. 0 times theorem prover too weak. 0 trivial. 839 not checked. [2021-11-25 19:10:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729545482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:28,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561700643] [2021-11-25 19:10:28,322 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:10:28,322 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:28,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:28,322 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:28,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:10:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:10:28,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:10:28,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:10:28,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:10:28,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:28,595 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:10:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:28,717 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:10:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:28,866 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:10:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:28,941 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:32,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28621#(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 [2021-11-25 19:10:32,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:10:32,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:10:32,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 68, 68] total 216 [2021-11-25 19:10:32,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350732861] [2021-11-25 19:10:32,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:10:32,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2021-11-25 19:10:32,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2021-11-25 19:10:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=33472, Unknown=40, NotChecked=16200, Total=50400 [2021-11-25 19:10:32,151 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 216 states, 216 states have (on average 1.7453703703703705) internal successors, (377), 216 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:41,968 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2021-11-25 19:10:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-25 19:10:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 216 states have (on average 1.7453703703703705) internal successors, (377), 216 states have internal predecessors, (377), 0 states have call successors, (0), 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 130 [2021-11-25 19:10:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:41,970 INFO L225 Difference]: With dead ends: 237 [2021-11-25 19:10:41,970 INFO L226 Difference]: Without dead ends: 152 [2021-11-25 19:10:41,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 253 SyntacticMatches, 23 SemanticMatches, 280 ConstructedPredicates, 40 IntricatePredicates, 16 DeprecatedPredicates, 19091 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1086, Invalid=57356, Unknown=40, NotChecked=20760, Total=79242 [2021-11-25 19:10:41,974 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 3123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 6981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3836 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:41,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1637 Invalid, 6981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3123 Invalid, 0 Unknown, 3836 Unchecked, 1.3s Time] [2021-11-25 19:10:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-25 19:10:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-25 19:10:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 150 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-11-25 19:10:41,978 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 130 [2021-11-25 19:10:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:41,978 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-11-25 19:10:41,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 216 states have (on average 1.7453703703703705) internal successors, (377), 216 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-11-25 19:10:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 19:10:41,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:41,980 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1] [2021-11-25 19:10:42,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:42,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-25 19:10:42,196 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:10:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -640132724, now seen corresponding path program 33 times [2021-11-25 19:10:42,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192670901] [2021-11-25 19:10:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:42,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 361 proven. 962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:43,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192670901] [2021-11-25 19:10:43,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192670901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166624221] [2021-11-25 19:10:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:10:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:43,502 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:43,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 19:10:43,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:10:43,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:10:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 332 conjunts are in the unsatisfiable core [2021-11-25 19:10:43,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:43,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:10:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:10:45,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:45,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:46,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:46,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:48,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:48,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:48,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:49,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:49,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:49,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:10:50,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:50,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:10:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 420 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:50,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:57,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4145 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1015| Int)) (or (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1015|) (<= (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1015| 22) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4145) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1015| 20)) 0) (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1015| 0))) is different from false [2021-11-25 19:10:57,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:10:57,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:10:57,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:10:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 441 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2021-11-25 19:11:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166624221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892359206] [2021-11-25 19:11:03,261 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:11:03,261 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:11:03,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:11:03,261 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:11:03,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:11:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:11:03,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:03,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:03,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:03,502 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:11:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:03,638 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:11:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:03,793 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:11:03,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:03,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:11:07,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30125#(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 [2021-11-25 19:11:07,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:11:07,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:11:07,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 69, 69] total 183 [2021-11-25 19:11:07,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337927596] [2021-11-25 19:11:07,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:07,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-11-25 19:11:07,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-11-25 19:11:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=33380, Unknown=19, NotChecked=380, Total=37056 [2021-11-25 19:11:07,477 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 184 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:21,111 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2021-11-25 19:11:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-25 19:11:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 184 states have internal predecessors, (394), 0 states have call successors, (0), 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 132 [2021-11-25 19:11:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:21,112 INFO L225 Difference]: With dead ends: 151 [2021-11-25 19:11:21,112 INFO L226 Difference]: Without dead ends: 151 [2021-11-25 19:11:21,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 262 SyntacticMatches, 12 SemanticMatches, 258 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13698 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=9167, Invalid=57558, Unknown=101, NotChecked=514, Total=67340 [2021-11-25 19:11:21,115 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 428 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:21,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 321 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2356 Invalid, 0 Unknown, 750 Unchecked, 1.3s Time] [2021-11-25 19:11:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-25 19:11:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-25 19:11:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-11-25 19:11:21,119 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 132 [2021-11-25 19:11:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:21,120 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-11-25 19:11:21,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 184 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-11-25 19:11:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 19:11:21,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:21,121 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 21, 21, 1, 1, 1, 1, 1] [2021-11-25 19:11:21,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:21,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-25 19:11:21,340 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:11:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash -46979172, now seen corresponding path program 34 times [2021-11-25 19:11:21,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594014406] [2021-11-25 19:11:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:21,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 993 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:22,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594014406] [2021-11-25 19:11:22,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594014406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272387545] [2021-11-25 19:11:22,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:11:22,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:22,623 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:22,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 19:11:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 169 conjunts are in the unsatisfiable core [2021-11-25 19:11:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:23,051 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:11:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 1015 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:25,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 1014 proven. 485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:27,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272387545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:27,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309625139] [2021-11-25 19:11:27,838 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:11:27,838 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:11:27,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:11:27,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:11:27,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:11:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:11:27,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:27,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:27,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:11:28,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:28,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:28,107 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:11:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:28,201 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:11:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:28,308 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:11:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:11:28,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:11:30,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31549#(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 [2021-11-25 19:11:30,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:11:30,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:11:30,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 121 [2021-11-25 19:11:30,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472428372] [2021-11-25 19:11:30,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:30,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-25 19:11:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-25 19:11:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2557, Invalid=14213, Unknown=0, NotChecked=0, Total=16770 [2021-11-25 19:11:30,035 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 121 states, 121 states have (on average 2.652892561983471) internal successors, (321), 121 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:32,735 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-11-25 19:11:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-25 19:11:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.652892561983471) internal successors, (321), 121 states have internal predecessors, (321), 0 states have call successors, (0), 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 140 [2021-11-25 19:11:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:32,737 INFO L225 Difference]: With dead ends: 245 [2021-11-25 19:11:32,737 INFO L226 Difference]: Without dead ends: 154 [2021-11-25 19:11:32,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7868 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5830, Invalid=25322, Unknown=0, NotChecked=0, Total=31152 [2021-11-25 19:11:32,741 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:32,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 285 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:11:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-25 19:11:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-25 19:11:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.033112582781457) internal successors, (156), 152 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2021-11-25 19:11:32,745 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 140 [2021-11-25 19:11:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:32,745 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2021-11-25 19:11:32,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.652892561983471) internal successors, (321), 121 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2021-11-25 19:11:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 19:11:32,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:32,747 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-25 19:11:32,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:32,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-25 19:11:32,968 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:11:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1197278757, now seen corresponding path program 35 times [2021-11-25 19:11:32,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:32,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277980030] [2021-11-25 19:11:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:32,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:37,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277980030] [2021-11-25 19:11:37,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277980030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604026696] [2021-11-25 19:11:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:11:37,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:37,735 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-25 19:12:17,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 19:12:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 482 conjunts are in the unsatisfiable core [2021-11-25 19:12:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:17,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:20,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:21,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:21,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:22,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:22,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:23,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:24,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:24,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:24,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:25,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:25,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:25,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:26,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:26,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:28,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:28,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:28,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:28,048 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-25 19:12:28,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:12:28,071 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4556 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4556) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-25 19:12:28,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:12:28,091 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4555 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4555) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-25 19:12:28,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:12:28,114 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4554 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4554) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-25 19:12:28,125 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:12:28,135 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4553 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4553) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-25 19:12:28,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-25 19:12:28,156 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4552 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4552) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)))) is different from false [2021-11-25 19:12:28,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)) 0)) is different from false [2021-11-25 19:12:28,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4551 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4551) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 6)))) is different from false [2021-11-25 19:12:28,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:12:28,199 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4550 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4550) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:12:28,211 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:12:28,220 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4549 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4549) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 8)) 0)) is different from false [2021-11-25 19:12:28,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:12:28,237 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4548 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4548) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 9)) 0)) is different from false [2021-11-25 19:12:28,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:12:28,253 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4547 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4547) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 10)) 0)) is different from false [2021-11-25 19:12:28,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:12:28,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4546 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4546) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 11)) 0)) is different from false [2021-11-25 19:12:28,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:12:28,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4545 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4545) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 12)) 0)) is different from false [2021-11-25 19:12:28,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:12:28,312 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4544 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4544) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 13)) 0)) is different from false [2021-11-25 19:12:28,322 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:12:28,330 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4543 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4543) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 14)) 0)) is different from false [2021-11-25 19:12:28,340 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:12:28,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4542 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4542) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 15)) 0)) is different from false [2021-11-25 19:12:28,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:12:28,365 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4541 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4541) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 16)) 0)) is different from false [2021-11-25 19:12:28,374 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:12:28,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4540 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4540) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 17)) 0)) is different from false [2021-11-25 19:12:28,392 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 18)) 0)) is different from false [2021-11-25 19:12:28,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4539 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4539) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 18)))) is different from false [2021-11-25 19:12:28,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:12:28,420 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4538 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4538) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-11-25 19:12:28,430 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 20)) 0)) is different from false [2021-11-25 19:12:28,438 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4537 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4537) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 20)) 0)) is different from false [2021-11-25 19:12:28,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 21)) 0)) is different from false [2021-11-25 19:12:28,455 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int)) (v_ArrVal_4536 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_4536) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 21)) 0)) is different from false [2021-11-25 19:12:28,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4557 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4557) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 22)) 0)) is different from false [2021-11-25 19:12:28,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:28,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:12:28,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:28,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:12:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 485 refuted. 0 times theorem prover too weak. 0 trivial. 1011 not checked. [2021-11-25 19:12:31,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604026696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:31,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265280882] [2021-11-25 19:12:31,408 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:12:31,408 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:12:31,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:12:31,409 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:12:31,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:12:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:12:31,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:12:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:12:31,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:12:31,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:12:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:31,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:31,707 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:12:31,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:31,790 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:12:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:31,926 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:12:31,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:31,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:12:34,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33132#(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 [2021-11-25 19:12:34,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:12:34,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:12:34,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 74, 74] total 236 [2021-11-25 19:12:34,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627707042] [2021-11-25 19:12:34,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:34,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2021-11-25 19:12:34,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:12:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2021-11-25 19:12:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=39584, Unknown=44, NotChecked=19404, Total=59780 [2021-11-25 19:12:34,676 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 236 states, 236 states have (on average 1.75) internal successors, (413), 236 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:47,229 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2021-11-25 19:12:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-25 19:12:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 1.75) internal successors, (413), 236 states have internal predecessors, (413), 0 states have call successors, (0), 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 142 [2021-11-25 19:12:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:47,230 INFO L225 Difference]: With dead ends: 249 [2021-11-25 19:12:47,230 INFO L226 Difference]: Without dead ends: 156 [2021-11-25 19:12:47,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 327 ConstructedPredicates, 44 IntricatePredicates, 39 DeprecatedPredicates, 23638 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=1361, Invalid=79711, Unknown=44, NotChecked=26796, Total=107912 [2021-11-25 19:12:47,234 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 8934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4714 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:47,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1977 Invalid, 8934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4196 Invalid, 0 Unknown, 4714 Unchecked, 1.7s Time] [2021-11-25 19:12:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-25 19:12:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-25 19:12:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 154 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2021-11-25 19:12:47,238 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 142 [2021-11-25 19:12:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:47,238 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2021-11-25 19:12:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 1.75) internal successors, (413), 236 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2021-11-25 19:12:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:12:47,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:47,239 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2021-11-25 19:12:47,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:47,440 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:12:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1366727058, now seen corresponding path program 36 times [2021-11-25 19:12:47,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:12:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335527214] [2021-11-25 19:12:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:47,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:12:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 441 proven. 1146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:49,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:12:49,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335527214] [2021-11-25 19:12:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335527214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:49,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840535118] [2021-11-25 19:12:49,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:12:49,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:49,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:49,055 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:49,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 19:12:49,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:12:49,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 358 conjunts are in the unsatisfiable core [2021-11-25 19:12:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:49,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:49,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:12:51,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:12:51,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:51,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:52,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:52,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:52,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:53,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:53,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:53,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:55,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:56,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:56,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-11-25 19:12:56,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:56,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 19:12:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 506 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:57,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:05,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4782 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1168| Int)) (or (< |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1168| 0) (<= (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1168| 24) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (< |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1168|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_4782) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_1168| 22)) 0))) is different from false [2021-11-25 19:13:05,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:13:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 19:13:05,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:13:05,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 19:13:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 529 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-11-25 19:13:12,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840535118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499697260] [2021-11-25 19:13:12,118 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:13:12,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:13:12,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:13:12,119 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:13:12,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:13:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:13:12,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 19:13:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:12,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:12,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:12,401 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:13:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:12,507 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:13:12,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:12,657 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:13:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:12,737 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:13:16,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34775#(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 [2021-11-25 19:13:16,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:13:16,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:13:16,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 75, 75] total 199 [2021-11-25 19:13:16,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630294861] [2021-11-25 19:13:16,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:16,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2021-11-25 19:13:16,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2021-11-25 19:13:16,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3858, Invalid=39180, Unknown=22, NotChecked=412, Total=43472 [2021-11-25 19:13:16,861 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:35,130 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-11-25 19:13:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-25 19:13:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 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 144 [2021-11-25 19:13:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:35,132 INFO L225 Difference]: With dead ends: 155 [2021-11-25 19:13:35,132 INFO L226 Difference]: Without dead ends: 155 [2021-11-25 19:13:35,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 280 SyntacticMatches, 23 SemanticMatches, 275 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16392 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=10386, Invalid=65369, Unknown=149, NotChecked=548, Total=76452 [2021-11-25 19:13:35,136 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 681 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 8469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3769 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:35,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 703 Invalid, 8469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4047 Invalid, 0 Unknown, 3769 Unchecked, 2.4s Time] [2021-11-25 19:13:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-25 19:13:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-25 19:13:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-25 19:13:35,140 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 144 [2021-11-25 19:13:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:35,140 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-25 19:13:35,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-25 19:13:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-25 19:13:35,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:35,142 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 23, 23, 1, 1, 1, 1, 1] [2021-11-25 19:13:35,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:35,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:35,360 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:13:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1434307970, now seen corresponding path program 37 times [2021-11-25 19:13:35,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:35,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12901948] [2021-11-25 19:13:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:35,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 1179 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:36,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12901948] [2021-11-25 19:13:36,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12901948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:13:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105499203] [2021-11-25 19:13:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:13:36,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:36,804 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:36,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-25 19:13:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 183 conjunts are in the unsatisfiable core [2021-11-25 19:13:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:37,237 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:13:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 1203 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:40,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 1202 proven. 577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:42,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105499203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:42,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1206785664] [2021-11-25 19:13:42,887 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:13:42,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:13:42,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:13:42,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:13:42,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:13:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 19:13:42,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:43,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:43,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:13:43,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:43,192 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 19:13:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:43,302 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:13:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:43,478 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:13:43,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:13:43,552 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:13:45,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36296#(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 [2021-11-25 19:13:45,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:13:45,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:13:45,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 131 [2021-11-25 19:13:45,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420937278] [2021-11-25 19:13:45,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:45,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-25 19:13:45,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:45,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-25 19:13:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3000, Invalid=16460, Unknown=0, NotChecked=0, Total=19460 [2021-11-25 19:13:45,972 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 131 states, 131 states have (on average 2.66412213740458) internal successors, (349), 131 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:49,066 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2021-11-25 19:13:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-25 19:13:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.66412213740458) internal successors, (349), 131 states have internal predecessors, (349), 0 states have call successors, (0), 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 152 [2021-11-25 19:13:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:49,068 INFO L225 Difference]: With dead ends: 257 [2021-11-25 19:13:49,068 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 19:13:49,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9129 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=6832, Invalid=29458, Unknown=0, NotChecked=0, Total=36290 [2021-11-25 19:13:49,070 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:49,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 301 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:13:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 19:13:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-11-25 19:13:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-11-25 19:13:49,075 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2021-11-25 19:13:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:49,075 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-11-25 19:13:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.66412213740458) internal successors, (349), 131 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-11-25 19:13:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 19:13:49,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:49,077 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2021-11-25 19:13:49,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:49,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b5cb8b3-9484-42a9-82c2-54bc606385aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:49,304 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:13:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1122864007, now seen corresponding path program 38 times [2021-11-25 19:13:49,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:49,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960720078] [2021-11-25 19:13:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:49,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat